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.
How To:
Exercise with a thigh master
How To:
Do bench-dip exercises to increase your arm strength and size
How To:
Start a wrist powerball using the thumb technique
How To:
Use a kettlebell for a sumo dead lift high pull
How To:
Do ab rockers
How To:
Have sex on a Swiss Gym Fit-Ball (sexercise)
How To:
Use a stability ball for seated alternate cable rows
How To:
Practice proper chest focused Gravitron machine dips
How To:
Do alternate power stability ball pikes and knee tucks
How To:
Do a medicine ball squat thrust with a wall rebound
How To:
Perform inner thigh extensions with an exercise ball
How To:
Do advanced side-lying leg work on a Pilates Reformer
How To:
Build an Exercise Machine
How To:
Do a standing incline fly
How To:
Make a quick and easy homemade wrist roller
How To:
Do neutral grip pull ups to build upper body strength
How To:
Do a Gravitron tricep dips drop set
How To:
Do an exercise routine with a Functional Footprint
How To:
Work your chest with medicine ball chest passes
How To:
Sculpt your shoulders with medicine ball scoop tosses
How To:
Exercise with a thigh master
How To:
Do bench-dip exercises to increase your arm strength and size
How To:
Start a wrist powerball using the thumb technique
How To:
Use a kettlebell for a sumo dead lift high pull
How To:
Do ab rockers
How To:
Have sex on a Swiss Gym Fit-Ball (sexercise)
How To:
Use a stability ball for seated alternate cable rows
How To:
Practice proper chest focused Gravitron machine dips
How To:
Do alternate power stability ball pikes and knee tucks
How To:
Do a medicine ball squat thrust with a wall rebound
How To:
Perform inner thigh extensions with an exercise ball
How To:
Do advanced side-lying leg work on a Pilates Reformer
How To:
Build an Exercise Machine
How To:
Do a standing incline fly
How To:
Make a quick and easy homemade wrist roller
How To:
Do neutral grip pull ups to build upper body strength
How To:
Do a Gravitron tricep dips drop set
How To:
Do an exercise routine with a Functional Footprint
How To:
Work your chest with medicine ball chest passes
How To:
Sculpt your shoulders with medicine ball scoop tosses
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