6:17
[Super effective] 6-minute abdominal training to build a six-pack in the fastest time!
13:49
Ab Exercises Ranked (BEST TO WORST!)
6:27
割れない訳がない腹筋メニュー！超キツイ4分間腹筋トレーニング
9:34
A crazy workout that will make your abs "bumpy" in just one session
8:23