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Why Exercise?
- to experience the pleasure of an euphoric state
 - to improve your daily mood
 - to improve your energy levels
 - to enjoy the skill acquisition/challenge
 - to postpone your death
 - to enable yourself to participate in other cool activities, such as:
- hiking
 - surfing
 - rowing
 - etc
 
 - to age well, maintaining independence rather than becoming disabled
 - to increase your attractiveness
 
You likely find value in all or some of these benefits, which are difficult to obtain without regular exercise.
Additionally, you can have them in exchange for 1 hour or less of daily exercise.