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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Supplementation prevalence and adverse effects in physical exercise practitioners.

Walkíria Valeriano da Silva1, Maria Irene de Andrade Gomes Silva, Luciana Tavares Toscano

  • 1Department of Physical Education. Health Sciences Center. Federal University of Paraíba. João Pessoa. PB. Brazil.. alexandresergiosilva@yahoo.com.br.

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Summary

High prevalence of sports nutrition supplement use was found among exercise practitioners, with over half reporting adverse effects like acne and insomnia. Professional guidance is recommended to mitigate risks associated with supplement consumption.

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Area of Science:

  • Sports Nutrition
  • Exercise Physiology
  • Nutritional Biochemistry

Background:

  • Nutritional supplement use is widespread among athletes and exercise enthusiasts.
  • Reported adverse effects are often isolated, leading to underestimation of risks.

Purpose of the Study:

  • To determine the prevalence of nutritional supplement consumption.
  • To investigate the adverse effects associated with sports supplement use.

Main Methods:

  • Epidemiological, representative, and cross-sectional study.
  • 180 physical exercise practitioners completed questionnaires.
  • Subsample (n=86) underwent blood pressure measurement and blood analysis for lipid profile, hepatic, and renal function.

Main Results:

  • Supplementation prevalence was 58.3%, with only 21.9% guided by healthcare professionals.
  • Adverse effects (acne, insomnia, tachycardia) reported by users.
  • Elevated systolic blood pressure in supplemented group (p=0.04); higher in thermogenic users (p<0.0001) and long-term users (p=0.005).
  • Increased serum creatinine in carbohydrate supplement users (p=0.03).

Conclusions:

  • Elevated use of nutritional supplements without professional guidance among exercise practitioners.
  • Supplement use is linked to self-reported and clinically diagnosed adverse effects.