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Amino Acid Supplements and Recovery From High-Intensity Training

Amino Acid Supplements and Recovery From High-Intensity Training. Grant Alex Curtis. Why?. The purpose of this study was to examine the net hormonal effect of amino acid supplementation on the overreaching resistance training-induced hormonal stress response. Variables.

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Amino Acid Supplements and Recovery From High-Intensity Training

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  1. Amino Acid Supplements and Recovery From High-Intensity Training Grant Alex Curtis

  2. Why? • The purpose of this study was to examine the net hormonal effect of amino acid supplementation on the overreaching resistance training-induced hormonal stress response.

  3. Variables • Independent variable- Amino acid (BCAA) supplementation • Dependant variables- Testosterone, Creatinekinase, and Cortisol levels

  4. Brief Summary • Amino acid supplement or placebo was taken twice daily for 4 weeks. • During Week 4, high-intensity resistance training was added throughout that week. • Blood draws were taken 5 times for each 4-week period. • Testosterone, cortisol, and creatinekinaselevels were assessed before, during, and after.

  5. Hypothesis • Amino acid supplementation during overreaching would result in a net anabolic hormonal profile as a response to reduced skeletal muscle damage or enhanced recovery.

  6. Structure A balanced, cross-over, placebo-controlled, double-blind, repeated-measures design.

  7. Relationships • Key relationships to understand: • Testosterone when there is enhanced skeletal muscle repair • Cortisol when hormonal stress response is reduced • Creatinekinasewhen skeletal muscle repaired is enhanced

  8. Results

  9. External Validity • Is this experiment generalizing to a specific group or population? • Generalized to healthy active males with previous resistance training, to be exact athletes would be the correct term. • Positive relationship is the increase in testosterone levels • Negative relationship is the decrease in Serum Cortisol and Creatine Kinase levels. • The participants were selected from a sample of convenience, from a university. • Non-probabilistic study • Is a volunteer study

  10. Internal Validity • Multiple group threats • Reasonable number of participants- the study started out with 10 people in the study and ended with only 8. • Selection mortality threat- Two of the participants dropped put of the study. May not be a threat be though because both the drop outs were random. • Positives • The experiment does a good job of not having any testing threats. There are multiple pre and post tests through out the experiment. • It’s a fair and balanced study because both groups receive the placebo and the amino acids.

  11. Construct Validity • Face and Content Validity • Relationships • Mono operation bias • Diet-protein • Amino supplement proportions

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