[Metabolic states at athletes in the strenuous muscular activity of variable character]

Investigated dynamics of metabolic conditions at athletes in strenuous muscular activity of variable character. The sportsmen of high qualification specializing in bicycle and skating sports, performed in vitro work on a bicycle ergometer at level of critical power at the maximum consumption of oxygen. In two additional series of experiences each of examinees has performed work on critical power by the initial accelerations making 28% from limiting duration of exercise of 45 and 108 seconds. At work on critical power on a course of performance of exercise consecutive change of metabolic conditions with a phase initial a log-period, fast exponential increase to level of the critical power, the subsequent maintenance of critical power and final dissociation of functions of an aerobic metabolism at increase of local exhaustion was traced. It is established that the most effective concerning work maintenance at level of critical power are short-term (no more than 10 s) initial accelerations on the power corresponding to 45-second limiting exercises: these accelerations stimulate development of functions of an aerobic metabolism and don't lead to exhaustion anaerobic resources and to development of the expressed local exhaustion in the end of work.