Both running and indoor cycling can be effective forms of cardiovascular exercise that can help to improve endurance and burn calories. The number of calories burned during these activities will depend on a variety of factors, including the intensity of the workout, the individual’s weight, and the duration of the activity.

In general, running tends to burn more calories than indoor cycling, especially at higher intensities. According to the Centers for Disease Control and Prevention (CDC), a 155-pound person can expect to burn about 606 calories per hour running at a pace of 5 mph, while the same person would burn about 606 calories per hour cycling at a moderate intensity (12-13.9 mph). However, it is important to note that the number of calories burned can vary significantly based on individual differences.

It is also worth noting that indoor cycling can be a low-impact exercise, which may be easier on the joints compared to running. This can make it a good option for people who may be prone to injuries or have existing joint issues.

Ultimately, the best exercise for burning calories will depend on your individual fitness goals and preferences. It is important to choose activities that you enjoy and that are appropriate for your fitness level to help you stay motivated and consistent with your workouts.