Originally Posted by
manbeartruck
Not necessarily. Fat and muclemass aren't necessarily related, other than the fact that to GAIN muscle, you need to eat more than your body uses daily and to LOSE fat, you need to eat less. You can't do both effectively at once, at least not for an extended period of time and with a normal schedule.
This means that runners are skinny because they tune their body to handle a different type of stress than a someone who trains for the weightlifting olympics.
And your friend's strength probably has nothing to do with the fact that he plays basketball, but the fact that he is slim.