A simple test: sit in a chair and swing your arms back as far as you can without moving your lower body. This gives you a ...
3hon MSN
Ditch sit-ups and crunches — blast your abs in 10 minutes with this 4-move standing core workout
If you’re not a fan of sit-ups and crunches then you can stay standing with this 10-minute, 4-move abs workout that uses a ...
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