Rebuttal from Jonatan R. Ruiz, Michael Joyner and Alejandro Lucia

摘要

Guash and Nattel argue that a 'safety threshold' exists for endurance training, above which the risk of developing pathological cardiovascular conditions increases (Guash & Nattel, 2013). We make five points in rebuttal:(1) Epidemiological data in more than 50,000 Swedes who completed a 90 km cross-country ski race showed a 52% decrease in overall mortality and a 57% reduction in cardiovascular mortality (Farahmand et al. 2003). More protection was seen in individuals who completed more than one race suggesting that exercise-related cardiovascular benefits extend to extreme endurance exercisers. The uniformity of the Swedish medical care and records system makes these data convincing.