Briant_Gumble said:I didn't say a marathon distance runner.
In tournaments players spend vast amounts of time running back and forth on the baseline, they don't drop for crunches and press ups during matches. In tournaments they get a max of one day off in between matches, they are not going to lift weights on these days, I've only heard of players using these days to hit with a partner, do some flexibility/mobility exercises and/or get a massage.
They are in tournaments most of the year, it's only between tournaments they could weight train and have enough time to recover.
I dont think you understand the concept of even a moderate amount of weights enable you to bulk up, I know from personnel experience that two moderate weight sessions a week will put on muscle bulk.
Also if you took steroids without weight training you would not bulk up.
I will repeat, I don't know if Murray is on a program or not, but you can not tell by just saying he has put on muscle since he was 17, and if you beleive you can tell from that then you are living in cloud cuckoo land.