PHYSIOLOGICAL DIFFERENCES BETWEEN BLACK-AND-WHITE RUNNERS DURING A TREADMILL MARATHON

被引:75
作者
BOSCH, AN
GOSLIN, BR
NOAKES, TD
DENNIS, SC
机构
[1] UNIV CAPE TOWN,SCH MED,DEPT PHYSIOL,MRC,BIOENERGET RES UNIT,CAPE TOWN 7925,SOUTH AFRICA
[2] RHODES UNIV,DEPT HUMAN MOVEMENT STUDIES & PHYS EDUC,GRAHAMSTOWN 6140,SOUTH AFRICA
来源
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY | 1990年 / 61卷 / 1-2期
关键词
Marathon running; Maximum oxygen consumption; Race; Running economy;
D O I
10.1007/BF00236696
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
To determine why black distance runners currently out-perform white distance runners in South Africa, we measured maximum oxygen consumption (VO2max), maximum workload during a VO2max test (Lmax), ventilation threshold (VThr), running economy, inspiratory ventilation (VI), tidal volume (VT), breathing frequency (f) and respiratory exchange ratio (RER) in sub-elite black and white runners matched for best standard 42.2 km marathon times. During maximal treadmill testing, the black runners achieved a significantly lower (P<0.05) Lmax (17 km h-1, 2% grade, vs 17 km h-1, 4% grade) and VI max (6.21 vs 6.821 kg-2/3 min-1), which was the result of a lower VT (101 vs 119 ml kg-2/3 breath-1) as fmax was the same in both groups. The lower VT in the black runners was probably due to their smaller body size. The VThr occurred at a higher percentage VO2max in black than in white runners (82.7%, SD 7.7% vs 75.6%, SD 6.2% respectively) but there were no differences in the VO2max. However, during a 42.2-km marathon run on a treadmill, the black athletes ran at the higher percentage VO2max (76%, SD 7.9% vs 68%, SD 5.3%), RER (0.96, SD 0.07 vs 0.91, SD 0.04) and f (56 breaths min-1, SD 11 vs 47 breaths min-1, SD 10), and at lower VT (78 ml kg-2/3 breath-1, SD 15 vs 85 ml kg-2/3 breath-1, SD 19). The combination of higher f and lower VT resulted in an identical VI. Blood lactate levels were lower in black than in white runners (1.3 mmol l-1, SD 0.6 vs 1.59 mmol l-1, SD 0.2 respectively). It appeared that the only physiological difference that may account for the superior performance of the black runners was their ability to run at a higher percentage VO2max max during competition than white runners. © 1990 Springer-Verlag.
引用
收藏
页码:68 / 72
页数:5
相关论文
共 21 条
[1]   THERMOREGULATION DURING MARATHON RUNNING IN COOL, MODERATE, AND HOT ENVIRONMENTS [J].
ADAMS, WC ;
FOX, RH ;
FRY, AJ ;
MACDONALD, IC .
JOURNAL OF APPLIED PHYSIOLOGY, 1975, 38 (06) :1030-1037
[2]  
Armstrong RB, 1979, SPORTS MED PHYSL, P3
[3]  
Astrand PO, 1977, TXB WORK PHYSL
[4]  
BERGMEYER HU, 1981, METHOD ENZYMAT AN, V1, P1464
[5]   EXERCISE BREATHING PATTERN IN BLACK AND WHITE-CHILDREN AND YOUNG-ADULTS [J].
CERNY, FJ ;
HOLMES, J ;
SILLS, R .
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 1982, 14 (02) :131-131
[6]  
Consolazio CF., 1963, HDB PHYSL, P313
[7]  
Costill D., 1969, MED SCI SPORT, V1, P81, DOI DOI 10.1249/00005768-196906000-00005
[8]  
Costill D L, 1970, Arch Phys Med Rehabil, V51, P317
[9]  
COSTILL DL, 1971, INT Z ANGEW PHYSIOL, V29, P249
[10]  
DAWSON B, 1984, AUST J SCI MED SPORT, V16, P3