Originally Posted By: Powertothepeople
Question - is their another Olympic sport that consistently uses every muscle in your body?

Off the top of my head:

Water Polo
Swimming
Judo
Wrestling
Gymnastics
Kayaking
Pole Vault
High Jump
Long Jump
Triple Jump
Javelin
Discus
Hammer Toss
Shot Put
Hurdles
Volleyball
Basketball
Weightlifting

Rowing is a great and physically grueling sport -- don't get me wrong -- but your extraordinary claim that it is "easily the most difficult sport in the Olympics" requires extraordinary support.