How are boxers so light?

Question

How are boxers so light but muscley

I was Looking at Floyd Mayweather when he weighs 140 pounds and he looks so musely

I'm a little taller than him, I look really skinny but i'm 155-160pounds

Answer 1

boxers usually focus more on cardio then strength training

Answer 2

you have to work out man! the more you work out the more weight you lose,your skin becomes tighter and your muscles develope.

Answer 3

then you got a lot of fat

Answer 4

Pro Boxers train harder, or at least as hard as, any other pro athletes in the world.  

Answer 5

well none of the answeres youve been givin are really right. im a pro super middle weight boxer and most boxers aint walking around everyday at the weight you hear announced on tv.if you hear 140 they probally walk around at 160 normally. they slow there eating a few days before a fight then  24 hours before weigh in which is usually 24hrs before the fight they stop drinking and get in the sauna or a wet suit to sweat off another 5-15lbs to try to have a size advantage at fight time