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Bicycle or Running – Which is the Better Cardio Workout?

If you are looking to improve your fitness and cardiovascular health, both race cycling and marathon running are excellent forms of exercise to consider. Each sport offers unique benefits and challenges that can help you stay in shape and achieve your fitness goals.

When it comes to fitness, riding a bicycle provides a low-impact workout that can be gentler on your joints compared to running. Cycling not only strengthens your leg muscles but also engages your core and upper body, making it a full-body workout. It is a great way to improve endurance, build strength, and burn calories.

On the other hand, running is a high-impact exercise that primarily targets your lower body muscles, including your calves, thighs, and glutes. It is an intense cardiovascular activity that can improve your endurance, lung capacity, and overall cardiovascular health. Running also promotes weight loss, helps reduce stress, and boosts your mental wellness.

In terms of competition, both sports offer exciting opportunities to challenge yourself and set new goals. Bicycle races often involve strategies and teamwork, requiring a combination of speed, endurance, and tactics. Running marathons, on the other hand, test your mental and physical strength, as you push yourself to complete a long-distance race.

Ultimately, the choice between bicycle riding and running depends on your personal preference, fitness level, and specific goals. Both activities provide effective ways to improve your fitness and cardiovascular health. So whether you love the thrill of cycling or the freedom of running, incorporating either sport into your exercise routine will undoubtedly help you achieve your fitness goals and maintain a healthy lifestyle.

Benefits of Bicycling for Fitness and Cardiovascular Health

When it comes to race between bicycle and running, cycling has proven to be an excellent form of exercise for improving fitness and cardiovascular health. Here are some key benefits of bicycling:

1. Low Impact Exercise

Cycling is a low impact exercise, which means it puts less strain on your joints compared to running. This makes it an ideal choice for individuals with joint issues or those recovering from an injury.

2. Improved Cardiovascular Health

Cycling is a fantastic cardiovascular exercise that helps strengthen your heart, lungs, and circulatory system. Regular cycling can lower the risk of heart disease, high blood pressure, and stroke as it improves the overall health of your cardiovascular system.

Bicycling also helps increase your aerobic fitness, which is vital for endurance and stamina. It improves your body’s ability to utilize oxygen, boosting your overall fitness levels.

Moreover, cycling can help reduce LDL cholesterol levels (bad cholesterol) and increase HDL cholesterol levels (good cholesterol), further improving your cardiovascular health.

In conclusion, bicycling offers several benefits for fitness and cardiovascular health. It provides a low impact exercise option while still offering a high-intensity workout. With regular cycling, you can improve your aerobic fitness, strengthen your cardiovascular system, and lower the risk of various health conditions. So hop on your bike and start pedaling towards a healthier you!

Advantages of Running for Fitness and Cardiovascular Health

Running is an excellent form of exercise for improving fitness and cardiovascular health. Whether you prefer a leisurely jog or are training for a marathon, running offers numerous benefits for your overall well-being.

Here are some advantages of running:

Advantage Description
Improved cardiovascular health Running increases your heart rate, improving the strength and efficiency of your heart and lungs. Regular running can help reduce the risk of heart disease, high blood pressure, and stroke.
Weight loss and maintenance Running is an effective calorie-burning exercise that can help you lose weight and maintain a healthy body weight. It elevates your metabolism and promotes fat burning, leading to a leaner physique.
Stronger muscles and bones Running is a weight-bearing exercise that strengthens your muscles and bones. It helps improve bone density, reducing the risk of osteoporosis, and builds leg muscles, including quadriceps, hamstrings, and calves.
Mental well-being Running releases endorphins, also known as “feel-good” hormones, which can boost your mood, reduce stress, and alleviate symptoms of depression. It can also improve cognitive function and promote better sleep.
Enhanced endurance and stamina Regular running improves your aerobic capacity and increases your endurance, allowing you to engage in other physical activities for longer periods without getting tired easily. It can also help you perform better in sports and races.
Low cost and convenience Running requires minimal equipment, making it a cost-effective workout option. You can run almost anywhere, anytime, without the need for a gym or specialized facilities. It provides the freedom and flexibility to fit exercise into your schedule.

While both running and cycling offer great cardiovascular benefits, running has its own unique advantages. Incorporating running into your fitness routine can contribute to improved physical health and overall well-being.

Differences in Muscle Engagement between Bicycling and Running

When considering which form of exercise is better for overall fitness and cardiovascular health, it is important to understand the differences in muscle engagement between bicycling and running. Both activities provide great cardiovascular benefits and can improve overall fitness, but they do so in different ways.

Bicycling:

When cycling, the muscles primarily engaged are those in the lower body, including the quadriceps, hamstrings, calves, and glutes. These muscles work together to power the pedaling motion and propel the bicycle forward. Additionally, cycling also engages the core muscles, as they help to stabilize the body and maintain proper form on the bike.

Another unique aspect of bicycling is the option for competition and racing. There are various types of cycling races, from sprint events to long-distance races such as marathons. Competing in these races can further increase muscle engagement and overall fitness, as the intensity and duration of the race challenge the body even more.

Running:

In contrast, running engages a wider range of muscles throughout the body. While the lower body muscles are still heavily involved (quadriceps, hamstrings, calves, and glutes), running also engages the muscles in the upper body, including the core, back, and arms. This is because the swinging motion of the arms and the stabilizing role of the core are necessary for maintaining balance and propelling the body forward.

In addition to engaging more muscle groups, running also places a higher impact on the musculoskeletal system compared to cycling. This impact can strengthen bones and muscles, improve joint stability, and increase overall bone density.

It is important to note that both cycling and running provide excellent cardiovascular benefits and improve overall fitness. The choice between the two ultimately depends on personal preferences, goals, and any existing injuries or conditions that may impact the ability to engage in one or the other.

Regardless of whether you choose to cycle or jog, incorporating regular exercise into your routine is essential for maintaining good cardiovascular health and overall fitness.

Impact on Joints: Bicycling vs Running

When it comes to fitness and cardiovascular health, both bicycling and running are popular choices. However, one key factor to consider is the impact on joints.

Running is a high-impact exercise that puts significant stress on the joints, especially the knees and ankles. This is because running involves repeatedly striking the ground with force, which can lead to joint pain and even injury over time. Competitive runners, such as those training for marathons or races, are particularly at risk due to the long durations and intensity of their training.

In contrast, bicycling is a low-impact exercise that is gentle on the joints. When you cycle, your body weight is supported by the bicycle seat, reducing the impact on your knees and ankles. This makes cycling a great option for individuals with joint pain or those looking to avoid the potential joint stress associated with running.

Furthermore, cycling allows you to control the intensity of your workout. Whether you choose to go for a leisurely bike ride or participate in a competitive cycling event, you can customize the level of impact on your joints. This versatility makes cycling an excellent choice for individuals of all fitness levels and ages.

Ultimately, while both bicycling and running offer numerous health benefits, the impact on joints is an important consideration. If you’re looking for a cardiovascular exercise that minimizes the stress on your joints, cycling is a fantastic option to consider.

Caloric Burn: Bicycling vs Running

When it comes to calories burned, there is a fierce competition between bicycling and running. Both activities are excellent forms of exercise and can help improve cardiovascular health and overall fitness.

Bicycling

Bicycling is a popular sport and recreational activity that involves riding a bicycle. It can be done outdoors on roads or trails, or indoors on stationary bikes. Bicycling is a low-impact exercise, which means it puts less stress on the joints compared to running. However, it can still provide a high-intensity workout depending on the speed and terrain.

The number of calories burned while bicycling depends on various factors such as body weight, speed, and intensity. On average, a person weighing around 155 pounds can burn about 298 calories in 30 minutes of moderate-intensity bicycling. If the intensity is increased to vigorous, the calorie burn can go up to 372 calories in the same amount of time.

Running

Running, or jogging, is a popular form of exercise that requires no equipment other than a good pair of running shoes. It is a weight-bearing exercise and engages multiple muscles, making it an excellent choice for burning calories and improving cardiovascular endurance.

The number of calories burned while running depends on factors such as body weight, pace, and terrain. On average, a person weighing around 155 pounds can burn about 372 calories in 30 minutes of running at a moderate pace. If the pace is increased to a faster speed, the calorie burn can go up to 446 calories in the same amount of time.

Calories Burned (30 Minutes)
Bicycling (Moderate intensity) 298
Bicycling (Vigorous intensity) 372
Running (Moderate pace) 372
Running (Faster pace) 446

Overall, both bicycling and running are effective exercises for burning calories and improving cardiovascular health. The choice between the two depends on personal preference, physical condition, and access to equipment. Some people may find bicycling more enjoyable, while others may prefer running. Ultimately, the most important thing is to engage in regular physical activity to maintain a healthy lifestyle.

Cardiovascular Benefits of Bicycling

Cycling is a popular and effective form of exercise that offers numerous cardiovascular benefits. Whether you’re riding a bicycle for leisure or training for a marathon or race, cycling can greatly improve your cardiovascular health and fitness levels.

  • Improved heart health: Cycling is a great way to strengthen your heart muscles and improve overall heart health. Regular cycling can lower the risk of cardiovascular diseases, such as heart attacks and strokes.
  • Increased endurance: Riding a bicycle regularly can help improve your cardiovascular endurance. This is particularly beneficial for long-distance cyclists who need the stamina to endure hours of riding.
  • Burns calories: Cycling is an excellent calorie-burning exercise. It can help you achieve and maintain a healthy weight, reducing the risk of obesity and related cardiovascular problems.
  • Strengthens leg muscles: Cycling primarily works the muscles in your legs, including the quadriceps, hamstrings, and calves. Strengthening these muscles improves your overall lower-body strength, making everyday activities easier and reducing the risk of injuries.
  • Low impact exercise: Compared to activities like jogging or running, which put stress on the joints, cycling is a low impact exercise that is gentle on the knees and ankles. This makes it an ideal option for people with joint issues or those recovering from injuries.
  • Reduces stress: Cycling outdoors can provide an opportunity to connect with nature and enjoy the surroundings. This can help reduce stress levels and improve mental well-being, which is essential for overall cardiovascular health.

Overall, incorporating cycling into your fitness routine can have significant positive effects on your cardiovascular health. It is a versatile and enjoyable form of exercise that can be adapted to suit any fitness level or goal. So, hop on your bicycle and start pedaling towards better health and fitness!

Cardiovascular Benefits of Running

Running is a popular form of exercise that provides numerous cardiovascular benefits. Whether you are training for a marathon, participating in a race, or simply jogging in the park, running can improve your fitness and overall cardiovascular health.

Improved Heart Health

Running is an aerobic activity that increases your heart rate and strengthens your heart muscles. Regular running helps improve the efficiency of your heart, allowing it to pump blood more effectively. This can lead to a lower resting heart rate and reduced risk of heart disease.

Increased Stamina and Endurance

Running regularly helps improve your stamina and endurance. As you gradually increase your running distance, your body adapts and becomes more efficient at using oxygen. This allows you to sustain prolonged physical activity, such as running a longer distance or participating in a competition.

Running Cycling
Burns more calories Lower impact on joints
Improves cardiovascular fitness Can be done indoors
Builds strong leg muscles Beneficial for cross-training

Overall, running provides a range of cardiovascular benefits that can contribute to improved fitness and overall health. Whether you prefer to run for exercise, competition, or simply the joy of being active, incorporating running into your routine can be a great way to boost your cardiovascular health.

Factors to Consider when Choosing between Bicycling and Running

When deciding between bicycling and running as a form of exercise and cardiovascular fitness, there are several factors to consider. Both activities offer numerous benefits, but they also have their own specific considerations that can help you make a decision based on your goals and preferences.

Factor Bicycling Running
Impact Low impact exercise that reduces stress on joints High impact exercise that can put strain on joints
Muscle Engagement Primarily targets the lower body muscles Engages both upper and lower body muscles
Cardiovascular Fitness Effective for improving cardiovascular health and endurance Great for improving cardiovascular health and endurance
Competition Offers a variety of competitions such as cycling races and tours Can participate in races of varying distances including marathons
Accessibility Requires a functional bicycle and access to cycling routes Can be done anywhere without any special equipment
Time Commitment Tends to cover longer distances, requiring more time Can be done for shorter durations or longer distances
Variety Offers the opportunity to explore new routes and scenery Allows for more flexibility in terms of terrain and routes

Ultimately, the choice between bicycling and running depends on individual preferences, fitness level, and goals. Since both activities offer effective cardiovascular exercise and can improve your fitness, it’s essential to choose the one that you enjoy and can stick to in the long term. Consider your physical condition, accessibility to equipment and routes, personal preferences, and the competitive aspect if it interests you. Remember, the most important factor is consistency and finding a form of exercise that you can maintain regularly.

Safety Considerations for Bicycling

When it comes to choosing between cycling and running for fitness and cardiovascular health, safety is a key consideration. While both activities can provide great exercise and improve cardiovascular fitness, there are certain safety considerations that are unique to cycling.

Importance of Proper Equipment

One of the first safety considerations for cycling is having the proper equipment. A well-maintained bicycle with functioning brakes and lights is essential for ensuring a safe ride. Additionally, wearing a helmet is crucial for protecting the head and preventing serious injury in case of a fall or collision.

Sharing the Road

Unlike jogging or running, cycling often involves sharing the road with vehicles. It is important for cyclists to know and follow the rules of the road, including using hand signals, obeying traffic signals, and yielding to pedestrians. Being aware of one’s surroundings and staying visible through reflective clothing or accessories is also vital for staying safe while cycling.

Additionally, when cycling in a race or competition, it is important to be mindful of other participants and follow the designated route. Collisions or accidents can occur if cyclists do not adhere to the race rules or fail to maintain their own safety.

Proper Training and Conditioning

Cycling requires a certain level of skill and physical conditioning. It is important for cyclists, especially those participating in races or marathons, to undergo proper training and conditioning to ensure they have the necessary strength and endurance to handle the demands of the sport. This includes strengthening the core and leg muscles, improving balance, and practicing proper cycling techniques.

Regular exercise and cross-training can also help improve overall fitness and prevent injuries in cyclists. Incorporating stretching and strengthening exercises into one’s routine can help reduce the risk of strains, sprains, and other injuries commonly associated with cycling.

Overall, while cycling can be a great way to improve fitness and cardiovascular health, it is important to prioritize safety. By following proper equipment guidelines, sharing the road responsibly, and engaging in proper training and conditioning, cyclists can enjoy the benefits of cycling while minimizing the risk of accidents or injuries.

Safety Considerations for Running

Running is a popular form of exercise that offers numerous health benefits, but it’s important to take safety considerations into account. Whether you’re training for a marathon, going for a light jog, or simply enjoying a run around the neighborhood, keeping yourself safe should always be a priority.

1. Proper Footwear

Wearing the right shoes is essential for preventing injuries while running. Invest in a good pair of running shoes that provide adequate support and cushioning to reduce the risk of strains, sprains, and blisters. Properly-fitted shoes can also improve your running technique and help you maintain better balance.

2. Warm Up and Cool Down

Before starting any running session, it’s important to warm up your muscles and gradually increase your heart rate. This can be done through dynamic stretches and light jogging. Similarly, cooling down with static stretches after running can help reduce muscle soreness and prevent injury.

It’s also vital to listen to your body and adjust your pace and distance according to your fitness level and capabilities. Pushing yourself too hard can lead to overexertion and increase the risk of accidents or exhaustion.

Additionally, it’s crucial to be aware of your surroundings while running. Pay attention to traffic, pedestrians, and other potential hazards. Use designated running paths or sidewalks whenever possible, and wear reflective clothing if you’re running in low-light conditions.

While running can be a great way to stay fit and enjoy the cardiovascular benefits, it’s important to prioritize safety. By taking these considerations into account, you can have a safe and enjoyable running experience whether you’re training for a race or simply working towards your fitness goals.

Impact on Mental Health: Bicycling vs Running

Maintaining good mental health is an essential aspect of overall well-being, and both cycling and running can contribute positively to one’s mental health. Engaging in physical activities such as competition, fitness, jogging, running, race, marathon, cycling, or bicycle riding can have various effects on a person’s mental well-being.

The Psychological Benefits of Running

Running has numerous psychological benefits, including stress reduction, improved mood, and enhanced brain function. When a person runs, their body releases endorphins, which are known as “feel-good” hormones. These endorphins can help reduce stress and improve mood, making running an excellent form of therapy for individuals dealing with mental health issues such as anxiety or depression.

Additionallly, the repetitive nature of jogging or running can have a meditative effect on the mind, allowing individuals to clear their thoughts and find a sense of calm and focus. Running can provide mental clarity, act as a form of relaxation, and help individuals gain a fresh perspective on their problems.

The Psychological Benefits of Cycling

Cycling also has significant psychological benefits. Being outdoors, enjoying the scenery, and feeling the wind against one’s face can be incredibly uplifting. Cycling can provide a sense of freedom and adventure, allowing people to explore new places and push themselves to achieve new goals.

Similar to running, cycling also encourages the release of endorphins, improving mood and reducing stress. Furthermore, cycling can be a social activity, offering opportunities for connection and camaraderie with other cyclists through organized group rides, races, or cycling clubs.

A unique advantage of cycling is that it can be less impact on the joints compared to running. This can make it a more sustainable and enjoyable activity for individuals who may have joint issues or are looking for a low-impact alternative to running.

Ultimately, the impact on mental health from bicycling versus running can vary from person to person. Some individuals may find solace and balance in the rhythmic movements of running, while others may find joy and freedom in the exhilarating experience of cycling. It’s important to find the activity that resonates with you and brings you the most joy, as this will likely lead to the greatest mental health benefits.

Incorporating Variety into Your Fitness Routine: Bicycling and Running

When it comes to staying fit and keeping your cardiovascular health in check, incorporating variety into your fitness routine is key. While both cycling and running are effective forms of exercise, each offers its own unique benefits. By alternating between the two, you can challenge your body in different ways and avoid hitting a plateau in your fitness goals.

The Thrill of Competition

One of the great aspects of sports like cycling and running is the opportunity to participate in races and events. Whether it’s a local 5K or a marathon, these events not only give you a chance to test your skills but also help you stay motivated in your fitness journey. If you prefer the adrenaline rush of competition, signing up for cycling races or running events can add a whole new level of excitement to your routine.

Enjoying the Outdoors

Both cycling and running provide an excellent opportunity to enjoy the great outdoors. Whether you prefer the wind in your hair as you pedal through scenic routes or the freedom of jogging in nature, taking your workout outside can boost your mood and overall well-being. Additionally, outdoor exercise offers a change of scenery from the monotony of indoor gym workouts, making it easier to stay motivated and committed to your fitness routine.

Ultimately, the choice between cycling and running depends on your personal preferences and fitness goals. By incorporating both into your routine, you can enjoy the benefits of each and have a well-rounded approach to your fitness journey. So grab your bicycle or put on your running shoes and start exploring the endless possibilities of incorporating variety into your fitness routine!

Cross-training with Bicycling and Running

When it comes to fitness and cardiovascular health, both cycling and running are excellent forms of exercise. Each sport offers unique benefits, but combining the two through cross-training can take your fitness to the next level.

Engaging in both cycling and running allows you to work different muscle groups and challenge your body in various ways. Cycling primarily targets the lower body, specifically the quadriceps, hamstrings, and calf muscles. Running, on the other hand, engages more of the upper body, including the core, arms, and shoulders. By alternating between the two activities, you can develop a well-rounded physique and improve overall strength and endurance.

The Benefits of Cross-training

One of the main advantages of cross-training with cycling and running is injury prevention. Overuse injuries are common in sports that involve repetitive movements, such as cycling and jogging. By incorporating both activities into your routine, you can minimize the risk of developing these injuries by giving certain muscles a break while still maintaining your cardiovascular fitness.

In addition to injury prevention, cross-training with cycling and running can also enhance your performance in both sports. The different demands placed on your muscles during each activity can lead to improved strength and speed. For example, cyclists who incorporate running into their training regimen may find that their leg muscles become stronger, helping them pedal with more power and efficiency during a race or competition.

Tips for Cross-training with Bicycling and Running

When incorporating cycling and running into your cross-training routine, it’s important to listen to your body and gradually increase the intensity and duration of each activity. Start by alternating between shorter cycling and running sessions, and gradually increase the duration as your fitness improves. This will help prevent overexertion and reduce the risk of injury.

Additionally, be sure to include rest days in your cross-training schedule to allow your body to recover and adapt to the new demands placed upon it. Rest is just as important as exercise when it comes to improving fitness and preventing injuries.

In conclusion, cross-training with cycling and running can be a highly effective way to improve fitness and cardiovascular health. By incorporating both activities into your routine, you can work different muscle groups, reduce the risk of overuse injuries, and enhance your performance in both sports. So grab your bicycle and jogging shoes and start reaping the benefits of this dynamic cross-training combination!

Bicycling vs Running: Which is Suitable for Different Age Groups

Exercise is important for people of all ages, but the type of exercise that is most suitable can vary depending on age and physical condition. When it comes to choosing between bicycling and running, different age groups may have different preferences and needs.

Jogging is a popular choice for many adults of all ages. It is a simple and effective way to improve cardiovascular fitness and burn calories. Running can also be a great option for those who enjoy participating in marathons or races, as it provides a sense of competition and achievement.

However, as we age, our joints and bones may become more prone to injuries and strain. This is where bicycling can be a fantastic alternative. Riding a bicycle is a low-impact exercise that puts less stress on the joints, making it a suitable option for older adults.

For younger individuals, both jogging and cycling can offer excellent benefits for cardiovascular health and fitness. It ultimately comes down to personal preference and goals. Some people may enjoy the sense of freedom and speed that comes with cycling, while others may prefer the intensity and challenge of running.

It is worth mentioning that cycling is also a versatile exercise that can be adjusted to different fitness levels. Beginners can start with leisurely rides and gradually increase the intensity, while more experienced cyclists can push themselves in challenging races or competitions.

In conclusion, both jogging and cycling can be beneficial for cardiovascular health and fitness, but the suitability for different age groups may vary. Older adults may find bicycling to be a more joint-friendly option, while younger individuals can enjoy the versatility and intensity of both activities. The most important thing is to choose an exercise that you enjoy and can stick to in the long run.

Questions and answers:

What are the benefits of cycling for fitness and cardiovascular health?

Cycling is a low-impact aerobic exercise that helps improve cardiovascular health by increasing the heart rate and improving blood circulation. It also helps build leg and core muscles, improves balance and coordination, and is a great way to burn calories and maintain a healthy weight.

Is running a better exercise than cycling for cardiovascular health?

Running is another excellent aerobic exercise that offers similar benefits to cycling. It increases heart rate, burns calories, improves cardiovascular health, and builds leg muscles. However, running is a high-impact exercise that puts more stress on the joints, so it’s important to listen to your body and choose the exercise that works best for you.

How often should I cycle or run to improve my cardiovascular health?

To improve cardiovascular health, it is recommended to engage in aerobic exercise, such as cycling or running, for at least 150 minutes per week. This can be divided into several sessions of 30 minutes or more. It’s important to gradually increase the duration and intensity of your workouts to prevent injury and maximize the benefits.

Can I lose weight by cycling or running?

Both cycling and running are effective exercises for weight loss. They burn calories, increase metabolism, and help create a calorie deficit, which is essential for losing weight. However, it’s important to combine regular exercise with a healthy diet to achieve the best results.

I have knee pain. Is cycling or running a better option for me?

If you have knee pain, cycling is generally considered a better option than running. Cycling is a low-impact exercise that puts less stress on the joints, making it suitable for people with knee or joint issues. However, it’s always best to consult with a healthcare professional before starting any new exercise routine, especially if you have existing injuries or medical conditions.

What are the benefits of cycling for fitness and cardiovascular health?

Cycling is an excellent form of exercise that offers numerous benefits for fitness and cardiovascular health. It is a low-impact exercise that puts less stress on the joints compared to running. Regular cycling can help improve cardiovascular endurance, strengthen the leg muscles, and increase overall fitness levels. Additionally, it can aid in weight loss, improve mental health, and reduce the risk of heart disease and other chronic illnesses.

Is running more effective than cycling for weight loss?

When it comes to weight loss, both running and cycling can be effective. The number of calories burned during exercise depends on factors such as intensity, duration, and individual body composition. Running generally burns more calories per minute compared to cycling due to its higher impact and the involvement of more muscle groups. However, cycling can be sustained for longer periods, allowing for greater calorie burn over time. Ultimately, the best exercise for weight loss is the one that you enjoy and can consistently incorporate into your routine.

Which is better for cardiovascular health, cycling or running?

Both cycling and running are excellent forms of cardiovascular exercise and offer similar benefits for cardiovascular health. They help increase heart rate, improve circulation, strengthen the heart muscle, and lower the risk of cardiovascular diseases. The choice between the two depends on individual preferences, fitness level, and any pre-existing joint or musculoskeletal conditions. Cycling is generally gentler on the joints and may be a better option for those with joint issues, while running provides a higher impact workout and may lead to greater improvements in cardiovascular fitness.