The influence of two calculation methods on relative energy  contribution of men’s wheelchair racing T54 events

doi:10.12047/j.cjap.5895.2020.006

Abstract

Abstract: Objective:To study whether the two methods of energy calculation affects the value of relative energy contribution in men’s T54 wheelchair racing events. Methods: Ten men’s T54 wheelchair racers (age (22.9±5.2) yrs、sitting height (90.9±3.2) cm、body mass (59.3±8.3) kg) participate in 1 incremental test and 4 time trials (400 m、800 m、1 500 m、5 000 m). A portable gas analyzer, polar heart rate belt and a blood lactate analyzer were used to measure VO₂ at every breath, HR and blood lactate changes. The energetic contribution was measured with phosphocreatine-lactate-oxygen(PCr-La-O₂) and maximal accumulated oxygen deficit(MAOD) methods.Results: The anaerobic and total energy portions from MAOD were lower than those from PCr-La-O₂ ( especially in 400 m: W_TOT (50.8 ±12.7) KJ vs (65.2±13.5) KJ、W_ANA (31.0±9.0) KJ vs (45.4±11.4) KJ, P＜0.05), resulting in W_AER% calculated by MAOD was generally higher than PCr-La-O₂ method (especially in 400 m : W_AER% 39.0% ±1.2% vs 30.4%±8.4 %,P＜0.05).Conclusion: The study proves that the two-calculation method causes W_AER% difference. MAOD method does lead to an overestimate of W_AER%. Recommend to use the same calculation method for diagnosis and monitoring in the longitudinal study of long-term scientific research (such as the 4-year Olympic Games),to avoiding the difference in results caused by different calculation methods, which will further influence the development of coaches’ training plans and training implementation effect.

Key words: wheelchair racing, energy contribution, calculation method, overestimate

ZHANG Ling-ling, HUANG Peng, WU Xue-ping, JIN Lu, LI Xiao-tian , LI Yong-ming. The influence of two calculation methods on relative energy contribution of men’s wheelchair racing T54 events[J]. CJAP, 2020, 36(1): 27-32.

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The influence of two calculation methods on relative energy contribution of men’s wheelchair racing T54 events

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