Or maybe is was the fact they improved lactate threshold, anaerobic threshold, speed endurance, stride frequency/turnover, general fitness, VO2 uptake, lower bodyweight/fat %'s. etc etc.
Or maybe is was the fact they improved lactate threshold, anaerobic threshold, speed endurance, stride frequency/turnover, general fitness, VO2 uptake, lower bodyweight/fat %'s. etc etc.