The Knee Tuck or Jackknife is a challenging exercise that works your body from head to toe. The exercise is somewhat similar to Rollouts, requiring your lower abdominals to contract isometrically, stabilizing your spine.
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How To:
Start a wrist powerball using the thumb technique
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How To:
Do alternate power stability ball pikes and knee tucks
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How To:
Have sex on a Swiss Gym Fit-Ball (sexercise)
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How To:
Do a bent knee bridge on a swiss ball
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How To:
Do a Gravitron tricep dips drop set
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How To:
Do an exercise routine with a Functional Footprint
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How To:
Get a flat stomach with a fitness ball workout
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How To:
Start a powerball with the palm of your hand
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How To:
Exercise with a thigh master
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How To:
Make a quick and easy homemade wrist roller
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How To:
Use the control panel to set up your Power Plate
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How To:
Do advanced side-lying leg work on a Pilates Reformer
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How To:
Do a standing incline press
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How To:
Use a broom handle to get fit with SELF Magazine
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How To:
Practice proper chest focused Gravitron machine dips
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How To:
Do one arm medicine ball push ups
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How To:
Do stability ball backbend holds
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How To:
Do a hand to foot stability ball pass
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How To:
Do bench-dip exercises to increase your arm strength and size
-
How To:
Do fast alternate gut punches on a heavy boxing bag
-
How To:
Start a wrist powerball using the thumb technique
-
How To:
Do alternate power stability ball pikes and knee tucks
-
How To:
Have sex on a Swiss Gym Fit-Ball (sexercise)
-
How To:
Do a bent knee bridge on a swiss ball
-
How To:
Do a Gravitron tricep dips drop set
-
How To:
Do an exercise routine with a Functional Footprint
-
How To:
Start a powerball with the palm of your hand
-
How To:
Get a flat stomach with a fitness ball workout
-
How To:
Use the control panel to set up your Power Plate
-
How To:
Make a quick and easy homemade wrist roller
-
How To:
Exercise with a thigh master
-
How To:
Do bench-dip exercises to increase your arm strength and size
-
How To:
Do advanced side-lying leg work on a Pilates Reformer
-
How To:
Use a broom handle to get fit with SELF Magazine
-
How To:
Do a standing incline press
-
How To:
Do fast alternate gut punches on a heavy boxing bag
-
How To:
Practice proper chest focused Gravitron machine dips
-
How To:
Do alternate lockout push ups on dumbbells
-
How To:
Do one arm medicine ball push ups
-
How To:
Do a hand to foot stability ball pass
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