For you to dramatically improve , you are gonna have to get lighter. Not 100 lbs lighter but maybe 40 60 lbs. my hitting partner now lost 160 lbs in 18 months of regular tennis and changing his eating Habits. You can do it. He went from 360 to 200 by I playing tennis 3-4 times per week and eating 6 smaller meals daily. Only snacks on fruit and granola and water.
Exercising is no problem. Finding time to do it is the problem. Eating healthier and smaller meals is also a problem too. I'm not going to deny that.
JYY; Volkl Power Bridge 10 (stock); AGE: 19