I was never able to exercise just for exercise's sake. Have to have active hobbies - old boat motors, workshop, yard projects.
Best thing i did in recent years is buy this '76 Ford pickup. Climbing under it, pulling motor and horsing around cylinder heads & crankshaft, sanding and painting has taken a double handful off my waistline and raised my endurance !
We do need exercise.
I look at exercise as paying the piper for freedom and quality of life in the old age. Who like to exercise? It's the benefit and the good feeling afterwards. I saw my mother-in-law living freely at home till 85. Her mind was still very clear. Then she became disable due to Parkinson disease, she can't keep the balance.The main problem is she never exercise, she was too weak to grab onto the railing and support herself. She had to move to a group home, the last few years, she was just in bed starring at the ceiling. Her mind just went and died.
On the other extreme, my sister's mother-in-law is strong like a bull, but she never work. She is still healthy, but her mind is gone.
Leason learn, there is no free ride. You pay now or you pay later!!! That's the reason even I am not working anymore, I spent the last 5 to 6 years studying hard to keep my mind "lubricated"!!!! Still here, kicking.