Pocket : Can You Swing It?

Pocket : Can You Swing It?: "Crank up the intensity of a classic move to carve a strong core
Doing 100 kettlebell swings in a row is tough.

Doing them on one leg at a time—as this month's challenge, the kettlebell spider swing, requires—will light your muscles on fire and strain your willpower. "The instability of the exercise calls more muscles into play, increasing the intensity of the workout," says BJ Gaddour, C.S.C.S., creator of the new DVD series, 10-Minute Torchers. "To complete 100 reps, you'll need not only strength and stamina but also total-body coordination.""

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