Heart rate-running speed index may be an efficient method of monitoring endurance training adaptation - Vesterinen, V.; Hokka, L.; Hynynen, E.; Mikkola, J.; Häkkinen, K.; Nummela, A. (The Journal of Strength and Conditioning Research, 2014)
Keywords: endurance events; endurance; training; adaptation; investigation method; measuring procedure; heart rate; velocity; USA; endurance sports