Sliding Straight Arm Jackknife Plank

General and Specifics

• this fitness exercise is comparable with the Sliding Mountain Climbers and Jackknife On Exercise Ball
• it is not about endurance so much
• target areas: hip flexor and core musculature, lower abs

Starting Position

• place the feet hip width apart on a towel
• bring your body into the Push-up position
• the hands are directly under the shoulders (also during the execution), the legs are stretched out backwards
• now only the balls are on the towel
• hold the hips up, so that your body is in a line from head to feet

Correct Execution

• brace the abs and pull the feet forward with bent legs
• if your thighs are vertical to the ground, you have reached the final position
• you can hold the position for a moment, to make the exercise more effective
• let the feet slide back to where you started
• the upper body is inactive during the whole exercise
• do this several times