Staying Fast by Strengthening Your Lower Leg Muscles
http://www.runnersworld.com/speed/stay-fast-as-you-age
Considering that achilles and calf strain are pretty typical complaints among older runners, this study makes some pretty good points. Although the authors admit that they’re not strength and conditioning coaches and therefore don’t make any specific recommendations, they concluded that masters runners might be able to run faster if they do more lower-leg strength and power training.