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| Name | Class |
|---|---|
| National Strength and Conditioning Association | OTHER |
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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Resistance exercise training | Experimental | Participants undergo 8 weeks (3 days/week) of resistance exercise training. |
|
| Control | No Intervention | Participants do not perform 8 weeks of resistance exercise training. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Resistance exercise training | Other | Traditional linear periodization resistance training. |
|
| Measure | Description | Time Frame |
|---|---|---|
| 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. | baseline, following the intervention (9 weeks) |
| Measure | Description | Time Frame |
|---|---|---|
| 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. | baseline, following the intervention (9 weeks) |
| Measure | Description | Time Frame |
|---|---|---|
| Change from baseline in the fatty acid saturation levels of the extramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | The score will reflect a saturation level of fatty acids in the extramyocellular lipid. The higher score, reflects greater fatty acid saturation. | baseline, following the intervention (9 weeks) |
Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hoglund Biomedical Imaging Center | Kansas City | Kansas | 66103 | United States | ||
| Exercise and Human Performance Laboratory |
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| ID | Term |
|---|---|
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001519 | Behavior |
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| ID | Term |
|---|---|
| D055070 | Resistance Training |
| ID | Term |
|---|---|
| D005081 | Exercise Therapy |
| D012046 | Rehabilitation |
| D000359 | Aftercare |
| D003266 | Continuity of Patient Care |
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| 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. |
| baseline, following the intervention (9 weeks) |
| Change from baseline in thigh muscle cross-sectional area. | Scores are measured cross-sectional area from ultrasound images. | baseline, following the intervention (9 weeks) |
| Change from baseline in the fatty acid saturation levels of the intramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | The score will reflect a saturation level of fatty acids in the intramyocellular lipid. The higher score, reflects greater fatty acid saturation. | baseline, following the intervention (9 weeks) |
| Change from baseline in motor unit firing rates during a 35% of maximal voluntary contraction (MVC). | 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. | baseline, following the intervention (9 weeks) |
| Change from baseline in motor unit firing rates during a 35% of maximal voluntary contraction (MVC). | Scores are measured with the slopes from the firing rates versus recruitment threshold relationships from the 35%. The higher slope score reflects greater muscle activation. | baseline, following the intervention (9 weeks) |
| Change from baseline in intramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | The score will reflect a concentration. The higher score, reflects more fat in the fibers. | baseline, following the intervention (9 weeks) |
| Change from baseline in extramyocellular lipids of the vastus lateralis, as measure with magnetic resonance spectroscopy | The score will reflect a concentration. The higher score, reflects more fat in the fibers. | baseline, following the intervention (9 weeks) |
| Overland Park |
| Kansas |
| 66213 |
| United States |
| Metabolic and Body Composition Laboratory | Overland Park | Kansas | 66213 | United States |
| Energy Balance Laboratory | Kansas City | Missouri | 64108 | United States |
| D005791 |
| Patient Care |
| D013812 | Therapeutics |
| D026741 | Physical Therapy Modalities |
| D064797 | Physical Conditioning, Human |
| D015444 | Exercise |
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |