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You don't need sit-ups — 3 ab exercises that build a stronger core using a Swiss ball
Check out the best ab exercises you can do using one Swiss ball. Swiss ball plank alphabets The exercise tests shoulder and core stability, coordination and balance while strengthening the same ...
The Sun1mon
Four at-home ab exercises from a personal trainer to fire up your core
THAT dusty old exercise ... known as Swiss balls, physio balls or stability balls, they can put your balance to the test. And when used correctly, they can help fire up your core muscles.