- Nov 25, 1999
- 7,926
- 43
Riding dirtbikes causes you to use virtually every muscle in your body. Many groups of muscles are used more than others but you probably did realize that some muscles are never used at the same time.
For instance, the muscles that make you smile :) are never used with your sphycter muscle, which makes you pucker up :moon: :yikes:
For instance, the muscles that make you smile :) are never used with your sphycter muscle, which makes you pucker up :moon: :yikes: