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Crunch (trunk flexion)

The crunch strengthens the trunk flexor muscles. Strengthening the trunk and hip muscles helps to improve gait, which in turn improves the muscle balance around the knee.

 


 

In case you cannot see the video, here is a still sequence -

crunch Lie on your back with your knees bent to support you. Hold a ball between your hands high above your head with the arms straight.
crunch Keeping the ball as high as you can, bend the trunk forwards, lifting the head off the pillow.
crunch Hold the position for a few seconds.
crunch Slowly relax. Repeat 5 times.
Updated: 04 Aug, 2013
ABOUT THE AUTHOR

Dr Sheila Strover

Clinical Editor
Degrees: 
BSc (Hons)
MB BCh
MBA

Dr Sheila Strover is the founder of the KNEEguru website. Although not a knee surgeon, she has a sound understanding of knee surgery and...

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