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Fitness

Go Hard Core: 5 Ab Exercises for a Faster Run

Get a whittle faster. In a study, runners who did these moves four times weekly shaved a minute off their 5K times in six weeks. Try two sets of 12 reps each.
101400186c Back Extension

Lie facedown on ball, knees bent and feet on wall behind you, toes on floor. Bend elbows by sides, bringing fists in front of shoulders. Lift upper body; lower.

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