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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.
Lie faceup on a stability ball, knees bent 90 degrees, feet on floor. Put hands behind head with elbows out to sides and crunch up, then lower.
Source: Study at Barry University in Miami Shores, Florida
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