When I'm in the gym, I ocassionally see people who are smaller than me lifting much heavier. Whilst I'm smart enough to ignore what other people can lift and concentrate on how the weight I'm lifting feels for me, I've often wondered what the connection is between size and strength. I don't find it so hard accepting that people smaller than me can lift more - they are simply stronger - but what I can't understand is why, if they can lift more, aren't they bigger than me? Or, alternatively, why when I'm lifting less am I bigger than them?