Crunches

Crunches
Instructions
  1. Lie on the floor, with your feet flat and the bottom of your back glued to the floor, hands against your temples.
  2. Slightly lift the upper back off the floor (do not pull your head with your arms).
  3. Hold this position for one second and go down without completely touching the ground with your back (so the muscles stay contracted).
Tip!
Never block your legs, it reduces the abs' work.
Muscles
Primary muscles - Abs
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