Make sure not to strain your neck.
Floor crunches with legs flat.
To do this crunch lie flat on your back with your knees propped up.
Raise your left leg toward your chest and extend your right leg straight as if you were pedaling a bike.
Add bicycle crunches to your ab workout.
Follow this progression to work your way up to the more challenging crunches we discuss today.
Straighten both the knees lifting the feet towards the ceiling.
The foundational exercise is the standard crunch performed face up with your feet flat on the floor and your knees bent.
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Your legs should be at a 90.
You can do dozens of bent leg crunch variations including crunches on your back with your feet in the air on your side with your back on an exercise ball or with your legs in motion.
Repeat it for 8 15 times.
To avoid straining your neck do not fully support your head in your hands.
Take a 15 sec break between.
Start with the crunch i and or the crunch ii.
If you want more resistance you can keep your legs straight out.
Using your core muscles lift the upper part of your body.
Your legs should be at a 90 degree angle to the floor.
Straight leg crunches duration.
Start on your back with your knees bent and feet flat on the floor.
Lift your arms off the floor and extend your legs out.
Do 2 3 sets of 10 repetitions.
Your arms should be above your head.