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Abstract

The aim of this study was to examine whether the sequence in which sprint (S) and endurance (E) races are executed has effects on performance and physiological responses in children. Seventy-seven male pubescent students aged 18 ± 3 years performed two protocols (P 1 and P 2) consisting in 2000m walking to warm-up (W) , followed by S on 100m and E on 1000m; (P 1 = W + S + E and P 2 = W + E + S). Heart rate (HR) was monitored continuously. Systolic blood pressure (SBP) and skin temperature (Tsk) were measured at the beginning and at the end of protocol. Two resting electrocardiogram (ECG) were registered before and after protocols. Performances of W (1183 ± 119 vs 1186 ± 130 s); E (389 ± 59 vs 355 ± 104s); S (21 ± 3 vs 21 ± 5s) during P 1 and P 2 respectively were similar. HR, Tsk were lower after E than S (p <0.01). SBP were higher after E than S (p <0.01). No significant differences were found in ECG between P 1 and P 2. In conclusion, the sequence in which S and E are executed induces different physiological responses and has no effect on physical performance in children.

Post-exercise heart rate variability recovery after 800-m endurance run load among Cameroonian adolescent's males

“…In practice, during evaluation and teaching session endurance races are perceived by schoolchildren as physically-exhausting and strenuous, and thus are generally performed at the end of PE session. 16 Occurrence of deleterious cardiovascular events, such as sudden cardiac death, in schoolchildren during PE related endurance races have been noticed these last years in the Cameroon. It is commonly known that cardiovascular events mostly arise during post-exercise recovery phase.…”