Abstract:
PURPOSE:The purpose of this study was to investigate the physiological adaptations of resistance training (RT) in prepubertal boys. METHODS:Eighteen healthy boys were divided into RT (n = 9, Mage = 10.4 ± 0.5 years) and control (CTR; n = 9, Mage = 10.9 ± 0.7 years) groups. The RT group underwent a resistance training during 12 weeks, 3 times per week, performing 3 sets of 6 to 15 repetitions at intensities ranging from 60% to 80% of maximal dynamic strength (1-repetition maximum [1-RM] values). Before and after the training, the groups were assessed in their body mass and composition (dual-energy X-ray absorptiometry), isokinetic dynamometry, 1-RM, and ergoespirometry. Moreover, force per unit of muscle volume was calculated by the quotient between 1-RM and lean mass. RESULTS:Both groups presented statistically significant (p < .05) increases in the 1-RM and force per unit of muscle volume in the knee extension and elbow flexion, but these strength increases were statistically significantly greater in the RT group (effect size [ES] = 2.83-9.00) than in the CTR group (ES = 0.72-1.00). Moreover, both groups statistically significantly increased in lean body mass variables (ES = 0.12-0.38). However, increases in the fat mass variables occurred only in the CTR group (ES = - 0.01-0.50), whereas no changes were observed in the RT group. Furthermore, there were statistically significant increases in all bone mineral content variables (ES = 0.13-0.43), without differences between groups. No cardiorespiratory changes were observed. CONCLUSION:Twelve weeks of RT was effective in improving strength and force per unit of muscle volume and prevented fat mass increases in boys.
journal_name
Res Q Exerc Sportjournal_title
Research quarterly for exercise and sportauthors
Cunha Gdos S,Sant'anna MM,Cadore EL,Oliveira NL,Santos CB,Pinto RS,Reischak-Oliveira Adoi
10.1080/02701367.2014.982782subject
Has Abstractpub_date
2015-06-01 00:00:00pages
172-81issue
2eissn
0270-1367issn
2168-3824journal_volume
86pub_type
杂志文章abstract::This study was designed to determine the number of days of pedometer monitoring necessary to achieve reliable and valid estimates of a 1-year average of step counts in adults based on either consecutive days (CD) or random days (RD) of data collection. Twenty-three participants (16 women; M age = 38 years, SD = 9.9) w...
journal_title:Research quarterly for exercise and sport
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更新日期:2009-09-01 00:00:00
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
pub_type: 杂志文章,随机对照试验
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
pub_type: 杂志文章,随机对照试验
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
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journal_title:Research quarterly for exercise and sport
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doi:10.1080/02701367.2011.10599774
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journal_title:Research quarterly for exercise and sport
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Research quarterly for exercise and sport
pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,随机对照试验
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