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Bone of Contention: What Exercises Increase Bone Strength?.

Riewald, Scott PhD,CSCS; Roetert, E. Paul PhD, FACSM
Strength & Conditioning Journal:
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summary: Short, intense bouts of load-bearing exercise are more effective at increasing bone mass than are bouts of long-duration, low-intensity exercise.

(C) 2004 National Strength and Conditioning Association