So I finished up last season at 6'4" and a shade under 200 pounds. At that point, I made the decision to work hard at getting bigger and stronger in the off season. After 10 weeks, I'm now 220. I used Rippetoe's novice program and added 75 pounds to my back squat, 60 pounds to my deadlift, and 30 pounds to my overhead press. I've been getting back into hitting the last few weeks and I definitely feel a ton stronger. I'm hitting serves and groundstrokes harder than I ever have and can maintain pace for a long time into hitting sessions, but my movement and agility is definitely less than what it was 10 weeks ago. In all fairness, I really can't be sure if this is because I've gained size or because I haven't played much tennis at all in the past 2 and a half months. I'm guessing it's more of the latter, but probably a combo of the two. It just brings up an interesting question; how strong is 'strong enough' for tennis? Without a doubt, an increase in overall strength is a good thing for sports in general, but increasing strength usually means increasing muscle and bodyweight. And in tennis an increase in bodyweight can be a serious hindrance and that negative may outweigh the benefits you get from a strength increase. The two guys I'd look at for comparison are Del Potro (6'6" 185) and Tsonga (6'4" 215). The question is, would Tsonga be better, worse, or the same if he dropped 20 pounds and would Delpo be better, worse, or the same if he gained 20 pounds? I've always been in the camp that adding muscle mass is always better with all else equal. This seems to be the case with Murray, who is certainly bigger now and has elevated his game from a few years ago. But then there are guys like Cilic and Davydenko who crush the ball and are durable despite their lean frames. Maybe it wouldn't matter as much for pros since they're at such a high level already, but I'm curious what people's personal experience is with this. Have you guys always played at the same weight or have you tried leaning out significantly or bulking up to imiprove? What were the effects of this for you on the court?