Hey everyone. I'm 15 and trying to start some serious strength training for tennis. I need to get bigger if I want to play this sport well... ALOT bigger. At the moment, I'm 5'10.5'', and weigh about 120. I'm really lacking in arm, core, and back strength. I'm also clueless about lifting or using machines.
I got a membership to my local rec center to start using the machines there. Can anyone give me some advice for a tennis player?