Mostly no, which appears to be the minority so I'll share. Adding exercise is adding stress, you need to find time, expend energy, you are physically tired afterwards, you feel guilt when you skip, muscle aches... It's all just terrible, but your body typically rewards you with endorphins to make it feel worthwhile, and more importantly it gives you a lot more opportunities. When you are in shape your perceived charisma goes up significantly, mostly because you are more attractive.

Reward needs to balance with effort. You'll have a lot more fun with concrete commitments, or if you actually enjoy the activity and want to do it. Going to the gym is depressing, but showing up for the weekly sportsball game will make sure you run a little every week and you might make some active friends that will introduce you to more things. Pickleball and indoor rock climbing are two entry friendly activities.