LiftSets

LiftSets / Exercises / Crunches

Crunches

Works the abdominals.

Crunches, start position, with the working muscles highlighted
Start
Crunches, finish position, with the working muscles highlighted
Finish

Bright blue is the target muscle. Darker blue is helping. The app shows this as a moving demo.

Muscles worked

abdominals

How many reps

GoalReps per set
Strength4-6
Muscle size8-12
Endurance12-20+

Whatever the number, the set should end within a rep or two of the point where you could not do another with good form.

KitBody only
LevelBeginner

What to think about

How to do it

  1. Lie flat on your back with your feet flat on the ground, or resting on a bench with your knees bent at a 90 degree angle. If you are resting your feet on a bench, place them three to four inches apart and point your toes inward so they touch.
  2. Now place your hands lightly on either side of your head keeping your elbows in. Tip: Don't lock your fingers behind your head.
  3. While pushing the small of your back down in the floor to better isolate your abdominal muscles, begin to roll your shoulders off the floor.
  4. Continue to push down as hard as you can with your lower back as you contract your abdominals and exhale. Your shoulders should come up off the floor only about four inches, and your lower back should remain on the floor. At the top of the movement, contract your abdominals hard and keep the contraction for a second. Tip: Focus on slow, controlled movement - don't cheat yourself by using momentum.
  5. After the one second contraction, begin to come down slowly again to the starting position as you inhale.
  6. Repeat for the recommended amount of repetitions.

Other exercises for the abdominals

Track it in LiftSets

Log Crunches with last time's numbers in front of you, a rest timer on your lock screen and a graph of your progress.

Coming soon to the App Store