blinkx

  • Ab Exercises - Jackknife Crunch on Aerobic Step

  • 00:00:45
  • Workoutz
    • Browse

Ab Exercises - Jackknife Crunch on Aerobic Step

Jackknife Crunch on Aerobic Step 09/16/2007 Fitness Are you tired of doing the same exercises for abs? The jackknife crunch may be the answer to your problems. This exercise effectively works the core muscles. It should be noted that whenever the knees move toward the chest (the jackknife motion), the hip flexors are involved. The hip flexor muscles ...

Workoutz | September 15, 2007Watch more videos from Workoutz

Tags:. .exhale. .abdomen. .abdominal. .simultaneously. .aerobic











Abdomen   Abdominal   Abs   Actually   Aerobic   Allow   Alternatives   Answer   Ball   Bring   Chest   Contract   Core   Crunch   Edge   Effectively   Exercises   Exhale   Extended   Fitness   Hip   Instructions   Involved   Isolate   Kick   Knees   Lean   Leg   Legs   Lift   Motions   Muscles   Noted   Position   Problems   Same   Simultaneously   Sit   Stability   Standing   Step   Sure   Thus   Tired   Toward   Upper   Whenever