Effects of intermittent fasting on physiological and psychobiological variables in Taekwondo during the pre-competitive period
Original article - e235586 - Published 2024 Abr 3
DOI:
https://doi.org/10.33233/rbfex.v23i1.5586Keywords:
weight loss, martial arts, sleep, physical exertionAbstract
Objective: To investigate the effects of a 12-hour intermittent fasting during a four-week pre-competitive training period in Taekwondo on physiological and psychobiological variables. Methods: The sample consisted of 9 Taekwondo athletes (age 18.4 ± 3.3 years; weight 63.58 ± 6.57 kg; height 1.72 ± 0.05 meters; experience in the sport 9.2 ± 3.4 years), of both genders. As inclusion criteria, athletes had to be eutrophic and aim for body mass reduction. The total duration of the study was 6 weeks, with the first 2 weeks dedicated to familiarization and reliability, while the subsequent 4 weeks involved training with a 12-hour intermittent fasting in a pre-competitive period. The following variables were assessed before, during, and after the 4-week training period: perceived recovery scale, heart rate variability, subjective perception of session effort. The evaluation of sleep quality was conducted before and after this training period. Results: No significant differences were found in the perceived recovery scale, as well as in heart rate variability. In the assessment of sleep quality, no significant differences were found in "wake-up time," "sleep duration," and "overall score." Subjective perception of session effort also did not show significant differences throughout the study. Conclusion: A 12-hour intermittent fasting, carried out over 4 weeks during the pre-competitive training period of Taekwondo, does not negatively influence physiological and psychobiological variables.
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