"Many cross-country runners suffer from running-related injuries, momentarily restricting their movements and pursuit in racing. Around 53% of collegiate runners suffer from either a second RRI or their first RRI. This is largely due to various of reasons, but the common one is due to the fact that running involves repetitive, high-impact movements of the legs, which affects the bone mineral density. As such, when bone density is at risk, this leads to a greater chance of developing a BSI (bone stress injury)."