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Machine crunches are a good way
to isolate your lower abase, but just as any AB machine they can
cause unnecessary back problems.
Here's the correct way to perform
this exercise.
1. Sit down on the seat and if there is a seat belt fasten it.
2. Now place your arms on the arm pad
3. Now slowly begin to tighten the AB muscles, while curling into
a ball, this will bring the arm pad to your thighs. Remember this
is an AB exercise not an arm exercise, make sure your not pushing
the pad down with your arms.
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