The back is arched in an unsafe position and momentum is what finishes the movement.
Abmat sit ups without abmat.
Jason talks about the benefits of using the abmat during a situp.
Without an abmat the back is arched and in an unsafe position.
An improper device will not give the proper support bend the knees about 45 with heals on the floor.
Crossfit seminar staff member julie foucher demonstrates the abmat situp.
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The lumbar spine should be extended fifteen to thirty degrees and the pelvis should be in an anterior tilt of ten to fifteen degrees.
3 full extension full contraction.
For those who are used to ab exercises such as standard crunches sit ups the abmat will make it feel like a new exercise.
Without an abmat the flat surface of the floor doesn t allow for the spine to fully extend making it impossible to obtain full range of motion.
With the abmat a proper sit up can be done with a neutral spine and without momentum for a more complete range of motion and more effective conditioning.
To get the most out of a sit up the abdominals must go from a position of maximal length to a position of minimal length.
Let us now examine the sit up redefined.
To do the correct movement lay flat on your back with an abmat or rolled up towel under your lower back.
Like every pad with the abmat name the wise crack is contoured to tilt the spine and enable a full extension of the abdominals at the beginning of a sit up not possible on a flat surface alone.
In my experience so far i can say the number of repetitions with the abmat versus standard crunches sit ups is about half at least in the beginning.
This is achieved by creating two pivot points one in the spine and another in the pelvis.
None the abmat sit ups as the name suggests is a simple sit ups variation performed by placing the abmat a core training accessory under your lower back.
Momentum not a legitimate contraction is what finishes the movement in a traditional sit up.
It can even be used for exercising the obliques.
It s a great tool for a variety of exercises that isolate the upper and or lower abs as well as the oblique s and lower back muscles.