my uncle says that poeple who training free exercises have long muscles and they have more strength than body builders who have short muscles. i practice body building and my uncle advised me to play the repetitions fast (and not slow) to make my muscles long to gain strength, is that right? i'm interested mainly to gain strength much more than mass which i don't care for. i read some articles about strength where they talked about long and short muscles fast twitch slow twitch and some other things but i still feel that i'm blind on how to gain strength, any one can help? thanks.