The purpose of this study is examine the effects of 8 weeks (3 days/week) of resistance exercise training in children 8 to 10 years of age on muscle strength, activation, and lipids of the vastus lateralis.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
32
Traditional linear periodization resistance training.
Hoglund Biomedical Imaging Center
Kansas City, Kansas, United States
Exercise and Human Performance Laboratory
Overland Park, Kansas, United States
Metabolic and Body Composition Laboratory
Overland Park, Kansas, United States
Energy Balance Laboratory
Kansas City, Missouri, United States
Change in the muscular strength of leg extensors, as measured with isometric strength.
The score will reflect the strength of the leg extensors. The higher score, reflects greater muscular strength.
Time frame: baseline, following the intervention (9 weeks)
Change from baseline in motor unit firing rates during a 60% of maximal voluntary contraction (MVC).
Scores are measured with the y-intercept from the firing rates versus recruitment threshold relationships from the 60%. The higher y-intercept score reflects greater muscle activation.
Time frame: baseline, following the intervention (9 weeks)
Change from baseline in motor unit firing rates during a 60% of maximal voluntary contraction (MVC).
Scores are measured with the slope from the firing rates versus recruitment threshold relationships from the 60%. The higher slope score reflects greater muscle activation.
Time frame: baseline, following the intervention (9 weeks)
Change from baseline in thigh muscle cross-sectional area.
Scores are measured cross-sectional area from ultrasound images.
Time frame: baseline, following the intervention (9 weeks)
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