Strength Training and Executive Functions: A Randomized Controlled Trial

Study Overview
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Brief Summary
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A group of 50 age-schooled adolescents was randomized into one intervention and another control group of 25 subjects each. After estimating one maximum repetition for all the participants in a previous session, the intervention group performed a resistance training based on a resistance exercise of 3 sets of 3 to 5 repetitions (90% of an estimated 1 RM) whereas the control group performed both stretching and balance exercises. Measures of executive functions ( i.e. a cognitive function associated with academic performance) were taken for all the participants before and after the training. Both independent and paired t-test will serve to check differences between and within groups respectively.

Detailed Description
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A group of 50 age-schooled adolescents was randomized into one intervention and another control group of 25 subjects each. After estimating one maximum repetition for all the participants in a previous session, the intervention group performed a resistance training based on a resistance exercise of 3 sets of 3 to 5 repetitions (90% of an estimated 1 RM) whereas the control group performed both stretching and balance exercises. Measures of executive functions ( i.e. a cognitive function associated with academic performance) were taken for all the participants before and after the training. Both independent and paired t-test will serve to check differences between and within groups respectively. The selected resistance exercise is based on a global muscle involvement.

Official Title
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Acute Effects of Strength Training Over Executive Functions in Adolescents: A Randomized Controlled Trial

Conditions
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Executive Function Disorder, Strength Training, Adolescent Behavior, Academic Achievement

Intervention / Treatment
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* Behavioral: Strength training
* Behavioral: Stretch and balance training


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy age-schooled adolescent Exclusion Criteria: Not healthy, injured age-schooled adolescent

Ages Eligible for Study
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Minimum Age: 15 Years
Maximum Age: 17 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Health Services Research
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Strength Training<br>The intervention group performs a resistance training based on a resistance exercise of 3 sets of 3 to 5 repetitions (90% of an estimated 1 RM) and 3 minutes of resting time between sets. | Behavioral: Strength training<br>* 3 sets of 3 to 5 repetitions with 4 minutes of rest between sets. 90% load of 1 maximum repetition of a resistance exercise<br>* Other names: Resistance training;|
| Placebo Comparator: Stretching<br>The control group performs 3 exercises of stretching and balance during one minute each and three sets. One minute of resting time between sets. | Behavioral: Stretch and balance training<br>* 3 sets of 3 exercises of stretching and balance of one minute each. One minute of resting time between sets.<br>* Other names: Stretching;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time to successfully complete the executive function test | Executive function | up to 24 weeks |