Y. Kumazaki

Adjustments of cardiac function during prolonged exercise relative to lactate threshold.

M. Takeda, K. Maeda, K. Asano, 1995, Applied human science : journal of physiological anthropology.

Walking velocity measured over 5 m as a basis of exercise prescription for the elderly: preliminary data from the Nakanojo Study

F. Togo, R. Shephard, S. Inoue, 2004, European Journal of Applied Physiology.