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Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Assomo Ndemba P. B. 1, Mandengue S. H. 1, Guessogo W. R. 2, Temfemo A. 1, Mekoulou Ndongo J. 1, Gassina G. 1, Etoundi-Ngoa S. L. 3
1 Exercise and Sport Physiology Unit, Faculty of Science, University of Douala Douala, Cameroon;
2 National Institute for Youth and Sports, Yaounde, Cameroon;
3 Department of Biological Sciences, ENS Yaounde, Yaounde, Cameroon
AIM: The aim of this study was to compare the physiological responses and the performance of athletes during twelve minutes run test (12-MRT) on a linear track compared to a closed track.
METHODS: Twelve healthy men and 10 healthy women took part in a 12-MRT either on a closed track (CLO) or a linear track (LIN) in random order. In both variants, distance covered, post-exercise blood lactate concentration ([La]) and Borg scale (RPE) were measured.
RESULTS: Distance covered was not significantly different (P>0.05) between the two variants in males and females; a decrease of 6.9% vs. 5.8% in LIN compared to CLO was respectively observed in males and females. This decrease was significant (P<0.05) in subjects with high performance (≥3000 m) and not significant (P>0.05) in subjects with low performance (<3000 m) in males; no significant variation (P>0.05) was observed in females whatever the performance class (<2500 m or >2500 m). There was a significant decrease of [La] (P<0.05) during the LIN compared to CLO in females. No significant difference (P>0.05) was found in RPE in males and females. A negative correlation (r=-0.62, P=0.03) was found between RPE and [La] during the LIN in females.
CONCLUSION: It appears that the linear track limits the performance of the subjects. This might be explained by the high variability of running economy in the two halves of running time.