Effect of training on peak oxygen uptake and blood lipids in 13 to 14‐year‐old girls

Abstract

The aim of this study was to investigate the effects of exercise training on the peak oxygen uptake (peak VO2) and blood lipid profile of 13 to 14‐y‐old postmenarcheal girls. Treadmill determined peak VO2, total cholesterol, high density lipoprotein cholesterol, low density cholesterol, and triglycerides were the outcome measures assessed at baseline and following exercise training. Twenty girls completed a 20‐wk programme of exercise training which involved maintaining the heart rate at 75–85% maximum for 20 min, three times per week. Heart rate was rigorously monitored using telemetry throughout each training session. Eighteen girls acted as the control group. There were no significant (p≫ 0.05) changes in the outcome measures following the training programme. Conclusions: These findings suggest that exercise training of this frequency, intensity and duration for a period of 20 wk has no significant effect on either the peak VO2 or blood lipid and lipoprotein profile of normolipidaemic, postmenarcheal girls.

Effects of Sex, Training, and Maturity Status on the Cardiopulmonary and Muscle Deoxygenation Responses during Incremental Ramp Exercise

“…In the current study, boys had a significantly higher peak compared to girls (23.7%), even after allometrically scaling for body mass (21.1%). These findings are congruent with previous research in which boys of varying training statuses had a 12.8–22.5% higher peak whether expressed in absolute [ 12 , 13 , 14 , 18 ] or allometrically scaled [ 6 , 7 , 8 , 15 , 18 ] terms, compared to maturity matched girls. The mechanisms underpinning these sex differences in peak however remain to be fully elucidated [ 4 , 19 ].…”

“…Puberty is highly sexually dimorphic, with significant differences in the timing and tempo of maturity-onset and hormonal milieus [ 10 , 11 ]. Whilst no studies have specifically sought to compare the influence of training in boys and girls, marked differences are apparent in the literature suggesting that, in contrast to boys [ 12 , 13 ], training was not associated with significant gains in pre-pubertal girls [ 14 ].…”

Is supervised exercise training safe in patients with anorexia nervosa? A meta-analysis

“…Exercise training appeared to have other benefits such as a significant increase in muscle strength [23] and cardiovascular endurance [27] without compromising body weight. The improvement in cardiovascular fitness (approximately 46%) for patients with anorexia nervosa [27] was much higher than that reported in similar aged females [36]. However, one study found that resistance exercise had no effect on muscular strength [24], probably because the intensity was inadequate (only one set of 10 to 15 repetitions) and the type of exercise was isometric instead of isokinetic.…”

Physical activity and cardiovascular risk factors in children

“…Two further studies have been published since this review 27 28. Overall, studies including clinical or school-based trials (randomised and non-randomised) show a weak beneficial effect on HDL-C and triglyceride levels, but no effect on total cholesterol or LDL-C levels 29–31. School-based interventions have generally not been effective in improving lipid and lipoprotein levels, but many of these interventions have also failed to increase PA or fitness 24 32.…”

“…Experimental training studies with children aged 8 years and older indicate improvements in aerobic fitness 24 28 30 32 79–81. Some intervention studies have used high-intensity aerobic sports, but it is interesting that differences in fitness were also found in relation to everyday activities such as cycling to school, and the differences seem not to be caused by selection 82–85.…”