Author(s): Dr. Vivek Pandey

Abstract:
Physiological study in relation to exercise and actual physical demand during event is very important to critically understand physiological basis of performance. The fatigue causing factors workload, recovery pattern from fatigue etc. should be very specifically understood in real terms. For the purpose of this study 20 male Junior National level Long distance runners (10 athletes each of 5,000mts and 10,000mts) from Tata Athletics Academy, Jamshedpur (Jharkhand) were selected. The age of the subjects ranged between 16-20 years. For the purpose of this study Heart rate, Respiratory rate and VO₂ max. were chosen as the Indicators of physiological responses and fatigue of long distance runners. The cardio-respiratory parameters were indicators as well as basis of aerobic and anaerobic performance capacity. Comparison of maximum oxygen consumption (vo₂ max.) of 5000m and 10000m distance For assessing the Maximum Oxygen Consumption (VO₂ max.) Cooper’s 12-minutes run/walk test was administered and the distance covered in 12-minutes was recorded and put in the formula to calculate the VO₂ Max. in ml/kg/min. (VO₂ max.)= (D12 -505)/45. where D12 = distance run in 12- minutes. In order to analyze the data descriptive statistics and independent- test was applied and level of significance was set at 0.05 level.it is evident that t-value is 1.32 which is not significant at 0.05 level with 18 degree of freedom. It indicates that mean scores of maximum oxygen consumption (VO₂ max) of 5000 mts and 10,000 mts runners do not differ significantly. Thus, it implies statistically the difference between the mean scores of VO₂ max of both the groups 74.22 and 75.56 were insignificant. The long distance running events like 5000mts and 10,000mts are not absolutely aerobic event. The anaerobic proportion of Long distance running 5000mts and 10,000mts is of significant level and fatigue caused in these events are due to anaerobic glycolysis and lactate accumulation is also in significant proportion along with aerobic part of the activity. The anaerobic lactate threshold of 5000mts and 10,000mts runners normally starts at 75-80% of VO₂ max. Heart rate assessment is one of the most effective and comprehensive method to examine load intensity, load factor or fatigue evaluation. A typical 5,000mts and 10,000mts events places workload demand intensity between 80-85% of maximum when observed in terms of heart rate at the end of the event.

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