3 ms·

Granted, and vice versa: you can do things walking or biking that you can't do on a train. Eg get a regular amount of exercise.

• asdff 8y ago
  Less than 200 calories burned from these activities, not a good source of regular exercise.
  • tasuki 8y ago
    Are calories burned the one and true way to measure whether exercise is "good"? Are you saying biking is not a good exercise?