Resistance Training
Conditions
Keywords
exercise, muscle cross-sectional area, intramyocellular lipids, extramyocellular lipids, strength
Brief summary
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.
Interventions
OTHERResistance exercise training
Traditional linear periodization resistance training.
Sponsors
National Strength and Conditioning Association
University of Kansas Medical Center
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
8 Years to 10 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy volunteer males and females ages 8 - 10 years.
Exclusion criteria
* No history or ongoing neuromuscular diseases, musculoskeletal injuries, or a disease that effects metabolism.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in the muscular strength of leg extensors, as measured with isometric strength. | baseline, following the intervention (9 weeks) | The score will reflect the strength of the leg extensors. The higher score, reflects greater muscular strength. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in motor unit firing rates during a 60% of maximal voluntary contraction (MVC). | baseline, following the intervention (9 weeks) | 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. |
| Change from baseline in thigh muscle cross-sectional area. | baseline, following the intervention (9 weeks) | Scores are measured cross-sectional area from ultrasound images. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in intramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | baseline, following the intervention (9 weeks) | The score will reflect a concentration. The higher score, reflects more fat in the fibers. |
| Change from baseline in the fatty acid saturation levels of the extramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | baseline, following the intervention (9 weeks) | The score will reflect a saturation level of fatty acids in the extramyocellular lipid. The higher score, reflects greater fatty acid saturation. |
| Change from baseline in extramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | baseline, following the intervention (9 weeks) | The score will reflect a concentration. The higher score, reflects more fat in the fibers. |
| Change from baseline in the fatty acid saturation levels of the intramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | baseline, following the intervention (9 weeks) | The score will reflect a saturation level of fatty acids in the intramyocellular lipid. The higher score, reflects greater fatty acid saturation. |
| Change from baseline in motor unit firing rates during a 35% of maximal voluntary contraction (MVC). | baseline, following the intervention (9 weeks) | Scores are measured with the y-intercepts from the firing rates versus recruitment threshold relationships from the 35%. The higher y-intercept score reflects greater muscle activation. |
Countries
United States
Outcome results
None listed