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Jumping jacks have come a long way since middle school.
Scientists reveal 3 strategies to make it all very possible.
Even "moderate" exercise has a big impact.
A new brain-stimulation treatment lessens perceived effort.
Your favorite diversions might be your Achilles heel.
Who needs a gym?
It's just as beneficial as 50 minutes of moderate work.
Preserve your abs with these quick, easy, effective moves.