Evaluation of physical fitness from field tests at high altitude in circumpubertal boys: comparison with laboratory data.
Field tests of running and laboratory tests were performed in La Paz [high altitude (HA), 3700 m] and in Clermont-Ferrand [low altitude (LA), 300 m] to investigate their validity at HA. Prepubertal boys of mean ages 10.6 years (HA1, n = 16; LA1, n = 28) and pubertal boys of 13.7 years (HA2, n = 12; LA2, n = 41) took part in the study. All the boys performed a 30-m sprint (V30m), a 30-s shuttle run (V30s) and a progressive shuttle run test until their maximal aerobic velocity (VmaxSRT). Maximal oxygen consumption was extrapolated from the last test (VO2maxSRT). In the laboratory, the boys performed a force-velocity test (Pmax), a Wingate test (PWing) and a graded test to measure maximal oxygen consumption (VO2maxB; direct method) on a cycle ergometer. At similar ages, there was no significant difference between HA and LA boys for V30m and Pmax. The V30s of HA boys was 3%-4% lower than those of LA boys (P < 0.05); there was no significant difference for PWing. Significant relationships were observed at both altitudes between Pmax (watts per kilogram) and V30m (HA: r = 0.76; LA: r = 0.84) and between PWing and V30s (HA: r = 0.67; LA: r = 0.77); the slopes and the origins were the same at HA and LA. The VO2max, VmasSRT and VO2maxB were lower by 9%, 12% and 20%, respectively, at HA than at LA (P < 0.05). However, the relationships between VO2maxB and VO2maxSRT (litres per minute) at HA (r = 0.88) and at LA (r = 0.93) were identical.(ABSTRACT TRUNCATED AT 250 WORDS)
Laboratoire de Biomécanique et de Biologie de l'Exercice, Université de Nice, France.
G
G
Falgairette
M
M
Bedu
N
N
Fellmann
H
H
Spielvogel
E
E
Van Praagh
P
P
Obert
J
J
Coudert
D000293:Adolescent; D000531:Altitude; D015308:Anaerobic Threshold / Q000502:physiology; D001827:Body Height; D001835:Body Weight; D002648:Child; D015444:Exercise / Q000502:physiology; D006801:Humans; D007773:Lactates / Q000097:blood; D019344:Lactic Acid; D008297:Male; D010100:Oxygen / Q000502:physiology*; D010101:Oxygen Consumption; D010809:Physical Fitness / Q000502:physiology*; D011627:Puberty
D007773:Lactates; D019344:Lactic Acid; D010100:Oxygen