Fitness, fatness, and the effect of training assessed by magnetic resonance imaging and skinfold-thickness measurements in healthy adolescent females

被引:36
作者
Eliakim, A [1 ]
Burke, GS [1 ]
Cooper, DM [1 ]
机构
[1] UNIV CALIF LOS ANGELES,HARBOR MED CTR,DEPT PEDIAT,DIV RESP & CRIT CARE,TORRANCE,CA 90509
关键词
magnetic resonance imaging; body fat; fitness; adiposity; skinfold thickness; adolescent females;
D O I
10.1093/ajcn/66.2.223
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
The relation between fitness and adiposity is particularly relevant to adolescent females in whom fitness is known to decrease and fatness to increase. However, little is known about the interaction of these variables in normally active, nonobese subjects. Our major hypotheses were that adiposity would be inversely correlated with physical fitness and that even a relatively brief intervention would lead to measurable, site-specific changes in body fat. We used a cross-sectional protocol to correlate body adiposity with indexes of fitness and a prospective study design to examine body adiposity before and after a 5-wk period of endurance training in 44 nonobese females aged 15-17 y (control group, n = 22; training group, n = 22). Adiposity was assessed by magnetic resonance imaging of the abdomen and thigh as well as by standard skinfold-thickness measuring techniques. Fitness was assessed by using cycle ergometer measurements of maximal oxygen uptake (VO2 max). There were significant negative correlations between VO2 max normalized to body weight and subcutaneous abdominal, thigh, and skinfold estimates of fat. However, when VO2 max was normalized to muscle volume these correlations were not significant. Abdominal fat increased in direct proportion to body weight (scaling factor = 1.14 +/- 0.16) but thigh fat increased proportionately less (scaling factor = 0.38 +/- 0.12, P < 0.05). Training increased thigh muscle mass significantly only in the midmuscle region and prevented the observed fat increase in the distal thigh of the control subjects. Body fat distribution in adolescent females appeared to be affected by many factors, including overall body weight and the level of physical activity.
引用
收藏
页码:223 / 231
页数:9
相关论文
共 31 条
[1]  
ABATE N, 1994, J LIPID RES, V35, P1490
[2]  
ALEXANDER HG, 1992, EUR J CLIN NUTR, V46, P903
[3]   BREATH-BY-BREATH MEASUREMENT OF TRUE ALVEOLAR GAS-EXCHANGE [J].
BEAVER, WL ;
LAMARRA, N ;
WASSERMAN, K .
JOURNAL OF APPLIED PHYSIOLOGY, 1981, 51 (06) :1662-1675
[5]   Fat distribution and cardiovascular risk factors in obese adolescent girls: Importance of the intraabdominal fat depot [J].
Caprio, S ;
Hyman, LD ;
McCarthy, S ;
Lange, R ;
Bronson, M ;
Tamborlane, WV .
AMERICAN JOURNAL OF CLINICAL NUTRITION, 1996, 64 (01) :12-17
[6]  
*CDCP, 1992, MMWR-MORBID MORTAL W, V41, P33
[7]   AEROBIC PARAMETERS OF EXERCISE AS A FUNCTION OF BODY SIZE DURING GROWTH IN CHILDREN [J].
COOPER, DM ;
WEILERRAVELL, D ;
WHIPP, BJ ;
WASSERMAN, K .
JOURNAL OF APPLIED PHYSIOLOGY, 1984, 56 (03) :628-634
[8]   ARE OBESE CHILDREN TRULY UNFIT - MINIMIZING THE CONFOUNDING EFFECT OF BODY SIZE ON THE EXERCISE RESPONSE [J].
COOPER, DM ;
POAGE, J ;
BARSTOW, TJ ;
SPRINGER, C .
JOURNAL OF PEDIATRICS, 1990, 116 (02) :223-230
[9]  
COOPER DM, 1989, ADV PEDIATRIC SPORT, V3, P67
[10]  
DAVIES CTM, 1972, HUM BIOL, V44, P195