Leg Muscle Power in 12-Year-Old Black and White Tunisian Football Players

Ayed, Karim Ben; Latiri, Imed; Eric, Doré; Tabka, Zouhaïr

doi:10.1080/15438627.2011.556527

Cited by 11 publications

(24 citation statements)

References 33 publications

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“…A frequent opinion in American basketball is that “White men can't jump” in agreement with some data in the literature collected in children (Ghesquière & Eeckels, ; Malina, ; Ben Ayed et al., ) and adults (Hunter, ; Seck, ; Zajac et al., ). In schoolboys of Kinshasa, it was observed that the better results in vertical jump in boys of African origins were the main differences with boys from European origins (Ghesquière & Eeckels, ).…”

Section: Discussionsupporting

confidence: 79%

Relationship between vertical jump and maximal power output of legs and arms: Effects of ethnicity and sport

Rouis

Attiogbé

Vandewalle

et al. 2014

Scandinavian Med Sci Sports

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The hypothesis that ethnicity and sport practice influence the relationship between maximal power in cycling (P(max)) and countermovement jump (CMJ) has been studied by relating CMJ and P(max) in two groups (volleyball players, VB, and physical education students, PES) including subjects with Caucasian (67 C) or West African (39 WA) origins. Maximal power of the arms (P(max) Arms) was also measured. A two-way analysis of variance (groups × ethnicity) showed significant effects of both factors upon CMJ, which was higher in WA and VB, P = 0.002 and P < 0.001, respectively. Within WA, CMJ was significantly higher in VB (0.732 ± 0.057 m) than in PES (0.661 ± 0.082 m), although there was no difference in P(max) (14.7 ± 1.7 vs 14.7 ± 1.9 W/kg). CMJ was significantly higher in WA (0.69 ± 0.08 vs 0.65 ± 0.09 m in C, P = 0.002) without significant interethnic difference in P(max) (14.7 ± 1.8 in WA, and 14.8 ± 1.9 W/kg in C). The CMJ-P(max) relationships were different in C and WA (P = 0.003). Therefore, CMJ predicted from P(max) would be underestimated in WA. The same difference was observed for the relationship between CMJ and P(max) Arms. These results were confirmed by the comparison with previous P(max) -CMJ relationship in the literature, collected in Caucasian and African subjects with the same protocols.

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Section: Discussionsupporting

confidence: 79%

Relationship between vertical jump and maximal power output of legs and arms: Effects of ethnicity and sport

Rouis

Attiogbé

Vandewalle

et al. 2014

Scandinavian Med Sci Sports

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“…In this latter study, the Afro-Caribbean group’s performance in Pmax was 6.1% higher than that of the Caucasian group. In contrast, in the studies of Ben Ayed et al (2011) and Rouis et al (2015), Pmax of Afro-Caribbean participants was lower than that of their Caucasian counterparts. Moreover, the study of Burfoot (1992) found no ethnic difference in Pmax.…”

Section: Discussionmentioning

confidence: 56%

“…However, it is interesting to note that whereas all studies showed higher vertical jump performance for Afro-Caribbean participants compared with Caucasians (Ben Ayed et al, 2011; Burfoot, 1992; Zajac et al, 2000), divergent results were obtained for maximal power. Considering Pmax, the results of the present study are consistent with those obtained in the study of Zajac et al (2000).…”

Section: Discussionmentioning

confidence: 99%

“…All of these studies found that Afro-Carribean males (Rouis et al, 2015; Zajac et al, 2000), young boys (Babel et al, 2005; Ben Ayed et al, 2011; Ghesquière and Eeckels, 1984; Malina, 1988), and adolescents (Burfoot, 1992) jumped higher than their white counterparts. In addition, a greater ability of Afro-Carribean participants has been extended more generally to locomotor skills in preschool children, for activities such as running, hopping, leaping or sliding (Goodway et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…While some studies showed that Pmax of Afro-Carribean participants was lower than that of their Caucasian counterparts (Ben Ayed et al, 2011; Rouis et al, 2015), others found that Pmax was similar in both ethnic groups (Burfoot, 1992) or higher for Caucasian compared with Afro-Carribean participants (Zajac et al, 2000). Since cycling is a complex cyclical activity requiring a specific coordination of the lower limb muscles, few authors have suggested that the contrasting results obtained on Pmax performance might stem from a practice effect (Ben Ayed et al, 2011; Vandewalle et al, 1987). Nevertheless, this hypothesis has not yet been truly tested.…”

Section: Introductionmentioning

confidence: 99%

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Effects of ethnicity on the relationship between vertical jump and maximal power on a cycle ergometer

Rouis

Coudrat

Jaafar

et al. 2016

Journal of Human Kinetics

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The aim of this study was to verify the impact of ethnicity on the maximal power-vertical jump relationship. Thirty-one healthy males, sixteen Caucasian (age: 26.3 ± 3.5 years; body height: 179.1 ± 5.5 cm; body mass: 78.1 ± 9.8 kg) and fifteen Afro-Caribbean (age: 24.4 ±2.6 years; body height: 178.9 ± 5.5 cm; body mass: 77.1 ± 10.3 kg) completed three sessions during which vertical jump height and maximal power of lower limbs were measured. The results showed that the values of vertical jump height and maximal power were higher for Afro-Caribbean participants (62.92 ± 6.7 cm and 14.70 ± 1.75 W∙kg-1) than for Caucasian ones (52.92 ± 4.4 cm and 12.75 ± 1.36 W∙kg-1). Moreover, very high reliability indices were obtained on vertical jump (e.g. 0.95 < ICC < 0.98) and maximal power performance (e.g. 0.75 < ICC < 0.97). However, multiple linear regression analysis showed that, for a given value of maximal power, the Afro-Caribbean participants jumped 8 cm higher than the Caucasians. Together, these results confirmed that ethnicity impacted the maximal power-vertical jump relationship over three sessions. In the current context of cultural diversity, the use of vertical jump performance as a predictor of muscular power should be considered with caution when dealing with populations of different ethnic origins.

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