Why The Seated Ab Crunch Machine Is Terrible!

Warning! Ab Crunch Machine Can Cause A Bulging Disc / Prolapsed Disc

使用をやめるべき8つのジムマシン

STOP doing this Crunch Machine at the gym❗️ try this alternative. #heydrrob #corestrength #abs

MBB Ab Crunch Machine,Exercise Equipment for Home Gym Equipment for Strength Training with Resistanc

ジムでこの AB/CRUNCH MACHINE を使用していますか?やめて、腰が折れるよ！代わりにこれを試してみてください!

腹筋トレーニングが時間の無駄である理由 (代わりにこれを実行してください!)

フルクランチマシン - 腹筋運動

最悪のエクササイズマシン5選とその代わりに何をすべきか

The TRUTH About Ab Wheels

Why Your Back Hurts When Doing Abs & What To Do About It

The ONLY 2 Ab Exercises You Need (NO, SERIOUSLY!)

STOP Doing Back Extensions Like This!

Cardio After Weight Training MISTAKE #shorts

Doctor Reacts to Electric Ab Stimulator! #shorts #abs

How to ACTUALLY do CABLE ab crunches #abs #absworkout

I Wore An Electric Ab Belt For A Week... Effortless 6-pack?

ABS Workouts Are WASTE OF TIME. DO THIS INSTEAD

Advanced Double Ab Crunch - Workout Anywhere

10 Exercises All Men Should AVOID!