maratoolWeighted Crunches
How to do the weighted crunches
- 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.
- Hold a weight to your chest, or you may hold it extended above your torso. This will be your starting position.
- Now, exhale and slowly begin to roll your shoulders off the floor. Your shoulders should come up off the floor about 4 inches while your lower back remains on the floor.
- At the top of the movement, flex your abdominals and hold for a brief pause.
- Then inhale and slowly lower yourself back down to the starting position.
Muscles worked
The prime movers are the rectus abdominis and the obliques, which flex the trunk forward and resist it being pulled into extension or twisted out of line.
Every exercise for:Abdominals
How this movement works
One joint changes angle and the resistance travels toward you along a single arc. Nothing is positioned to help, so tension stays where you aimed it and the usable load drops sharply against a multi-joint pull for the same muscle. Protect the range of motion; buying weight by shortening the arc defeats the point.
It is filed under strength: produce force against resistance for a countable number of repetitions, and progress the resistance over time.
What you need
A medicine ball can be thrown and caught, which suits movements where you keep accelerating the load all the way through instead of decelerating it to spare a joint.
Every exercise using:Medicine ball
These train the abdominals too, using equipment this one does not:
- Wind Sprintsbody only
- Ab Crunch Machinemachine
- Ab Rollout on Knees with Barbellbarbell
- Advanced Kettlebell Windmillkettlebell
- Bosu Ball Cable Crunch With Side Bendscable
Difficulty
Listed at beginner level: the pattern is simple enough to pick up without coaching, and a position that goes wrong mid-set is obvious enough to correct on the next repetition.
Of the 97 abdominals exercises in this database, 69 are listed at beginner level.
Photos: free-exercise-db — public domain (Unlicense) Full attribution →
ⓘ Informational only — not a substitute for professional fitness or medical advice.