Browsing by Autor "M. Bedu"

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Effect of anthropometric characteristics and socio-economic status on physical performances of pre-pubertal children living in Bolivia at low altitude
(Springer Science+Business Media, 1996) Róbert de Jonge; M. Bedu; Nicole Fellmann; Stéphen Blonc; Hilde Spielvogel; J Coudert
Effect of anthropometric characteristics and socio-economic status on physical performances of pre-pubertal children living in Bolivia at low altitude
(Springer Science+Business Media, 1996) Róbert de Jonge; M. Bedu; Nicole Fellmann; Stéphen Blonc; Hilde Spielvogel; J Coudert
Evaluation of physical fitness from field tests at high altitude in circumpubertal boys: comparison with laboratory data
(Springer Science+Business Media, 1994) G. Falgairette; M. Bedu; Nicole Fellmann; Hilde Spielvogel; Emmanuel Van Praagh; Philippe Obert; J Coudert
The Effect of Acute Hypoxia at Low Altitude and Acute Normoxia at High Altitude on Performance During a 30-s Wingate Test in Children
(Thieme Medical Publishers (Germany), 1994) Stéphen Blonc; G. Falgairette; M. Bedu; Nicole Fellmann; Hilde Spielvogel; Jérôme D. Coudert
The effect of acute hypoxia (FIO2 = 0.137 +/- 0.001) at Low Altitude (LA: Clermont-Ferrand, 330 m) and acute normoxia (FIO2 = 0.306 +/- 0.006) at High Altitude (HA: La Paz, 3600 m) on performance during a 30-s Wingate test has been investigated in prepubertal children (Tanner stage 1). Twenty five boys (LA, n = 10; HA, n = 15) aged from 10.6 to 12.7 years performed two Wingate tests at random: at LA, one in normoxia (ambient air) and one in acute hypoxia and at HA, one in chronic hypoxia (ambient air) and one in acute normoxia. The subjects performed the two tests using the same calibrated cycle ergometer. Peak Power (PP), Mean Power (MP), O2 uptake during the 30 s (VO2) and blood lactate accumulation (delta [L]s) were measured. Compared to normoxia, acute hypoxia at LA did not alter PP (8.0 +/- 1.1 vs 7.9 +/- 1.3 W.kg-1 BW) and MP (6.1 +/- 0.7 vs 6.1 +/- 1.1 W.kg-1 BW). Similarly, compared to chronic hypoxia, acute normoxia at HA did not modify these parameters (PP: 7.4 +/- 1.5 vs 7.3 +/- 1.8; MP: 5.4 +/- 1.2 vs 5.5 +/- 1.1; W.kg-1 BW). VO2 and delta [L]s were neither significantly changed by acute hypoxia at LA (520 +/- 50 vs 550 +/- 60 ml O2; 5.3 +/- 1.7 vs 4.8 +/- 1.7 mmol.l-1) nor by acute normoxia at HA (530 +/- 110 vs 500 +/- 90 ml O2; 3.4 +/- 1.3 vs 3.3 +/- 1.0 mmol.l-1).(ABSTRACT TRUNCATED AT 250 WORDS)
The importance of socioeconomic and nutritional conditions rather than altitude on the physical growth of prepubertal Andean highland boys
(Informa, 1994) Philippe Obert; Nicole Fellmann; G. Falgairette; M. Bedu; Emmanuel Van Praagh; H.C.G. Kemper; Bertheke Post; Hilde Spielvogel; V. Tellez; A. Qintela
The aim of this work was to study the effect of hypoxic stress on the physical growth of prepubertal Bolivian boys (10-11.5 years of age) of the same socioeconomic and nutritional conditions. The subjects consisted of 143 boys living in La Paz (altitude 3600 m, n = 67) and Santa Cruz de la Sierra (altitude 420 m, n = 76). Among the boys studied at high altitude, 23 were from a high socioeconomic background (HA1) and 44 from a low socioeconomic background (HA2). The group studied at low altitude consisted of 47 boys from a high socioeconomic background (LA1) and 29 from a low socioeconomic background (LA2). A scientific evaluation of the nutritional status of the boys was realized from specific anthropometric characteristics (height, body weight, upper arm muscle circumference, body fat mass and body mass index) and haematological (haematocrit, haemoglobin, serum iron, serum ferritin, red cell protoporphyrin, transferrin saturation) and biochemical (total serum protein, albumin and prealbumin) parameters. At high as at low altitudes, the biometric characteristics of boys from a low socioeconomic background were significantly lower than those of boys from a high socioeconomic background. The physical growth of HA2 and LA2 boys was delayed by approximately 2 years. All the boys had biochemical and haematological parameters within the normal range. Boys from a low socioeconomic background were considered as marginally undernourished and those from a high socioeconomic background as well-nourished. Within the same socioeconomic class there was no nutritional difference between highland and lowland boys. Similarly, and this is the most important feature of this study, there was no difference for the overall biometric characteristics between highland and lowland boys of the same socioeconomic and nutritional status. Therefore, it appears that when socioeconomic and nutritional conditions are taken into account, there is no effect of hypoxic stress on the physical growth of prepubertal Andean highland boys.