I believe there's a hockey stick there. I too had such experiences regarding exercises a few year back then, but after I decided to stick to it things started t

I believe there's a hockey stick there. I too had such experiences regarding exercises a few year back then, but after I decided to stick to it things started to improve, and now I do get more energetic even after rigorous workouts. I would theorizes that if you don't really exercise that regularly, exercise is indeed more a burden at first, and you need to work on it until it becomes 'profitable' one day.