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Is On Swiss Ball

from Tim Skafidas

Directions
Lying face down on a swiss ball, straighten your arms (thumbs up, shoulders back and down) and lift your upper body, contracting your core and breathing out at the top of the rep. Do this on a rug or other surface, so you can get friction with your feet into the floor.
Helpful tips and Tricks
Add a light weight to make this harder, or do the movement super slow.
Target Muscles
Equipment
None required