Double Crunch
Lie down on your back with your hands to your temples and your legs about a foot above the ground keeping them straight.
Only have your legs as low as you can without your lower back arching upwards.
Bring your head and shoulders upwards (as you would in a normal crunch) until your shoulder blades are off the ground. At the same time bring your legs up, keeping them straight until they are past vertical and your hips come up off the ground. When you have reached this point lower your legs and shoulders slowly back down to the start position.
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