Effect of long duration exercise on the ratings of perceived exertion and perceived diffculty of walking and running at the ventilatory threshold - Grego, F.; Collardeau, M.; Vallier, J. M.; Delignieres, D.; Brisswalter, J. (The Journal of Sports Medicine and Physical Fitness, 2004)
Keywords: ventilation threshold; running; race walking; long distance running; sport physiology; load; load duration; relation; Italy; biological and medical sciences; endurance sports