Effect of glutathione supplementation on swimmers’ performance
Background and Study Aim. Continuously increasing the volume and intensity of the training sessions often leads to overtraining. It has been demonstrated that glutathione supplementation might improve the aerobic metabolism in skeletal muscle and reduce exercise-induced muscle fatigue. The aim of th...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IP Iermakov S.S.
2021-08-01
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| Series: | Pedagogy of Physical Culture and Sports |
| Subjects: | |
| Online Access: | https://sportpedagogy.org.ua/index.php/ppcs/article/view/1720 |
| _version_ | 1818603008070516736 |
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| author | Lubomir Petrov Albena Alexandrova Mihail Kachaunov Radoslav Penov Tanya Sheytanova Stefan Kolimechkov |
| author_facet | Lubomir Petrov Albena Alexandrova Mihail Kachaunov Radoslav Penov Tanya Sheytanova Stefan Kolimechkov |
| author_sort | Lubomir Petrov |
| collection | DOAJ |
| description | Background and Study Aim. Continuously increasing the volume and intensity of the training sessions often leads to overtraining. It has been demonstrated that glutathione supplementation might improve the aerobic metabolism in skeletal muscle and reduce exercise-induced muscle fatigue. The aim of the study was to assess the effect of glutathione supplementation on fatigue, recovery processes, and competitive results of elite swimmers during a six-week training period.
Material and Methods. Twenty-four elite swimmers (10 women and 14 men) from the Bulgarian national swimming team, with a mean age of 18.7±3.78 years, took part in this double-blind placebo control study. The swimmers from the experimental group were supplemented once a day with a capsule of 250mg glutathione, whilst the swimmers from the control group took a placebo once a day. The urine concentration levels of cortisol and cortisone, as well as the degree of overtraining, were evaluated on the 1st(T1), 14th(T2), 28th(T3), and 42nd(T4) days. Anthropometric measurements and a nutritional assessment were performed at T1 and T4.
Results. The swimmers showed a gradual decrease of cortisol and cortisone during the study, with significantly lower concentrations in the experimental vs the control group at T4 (19.4 vs 42.5 ng/mL, p < 0.05). At the end of the study, the swimmers from the experimental group showed improvements in their time in 41 out of the 43 swimming events, whilst those from the control group had significantly smaller improvements (-1.66 vs -0.97%, p < 0.05).
Conclusions. In conclusion, glutathione supplementation at a dose of 250mg/day for six weeks improves the adaptation of elite swimmers towards training schedules, which is likely to lead to better sports results. |
| first_indexed | 2024-12-16T13:16:20Z |
| format | Article |
| id | doaj.art-45feb2c993db44e085542845e4196503 |
| institution | Directory Open Access Journal |
| issn | 2664-9837 |
| language | English |
| last_indexed | 2024-12-16T13:16:20Z |
| publishDate | 2021-08-01 |
| publisher | IP Iermakov S.S. |
| record_format | Article |
| series | Pedagogy of Physical Culture and Sports |
| spelling | doaj.art-45feb2c993db44e085542845e41965032022-12-21T22:30:28ZengIP Iermakov S.S.Pedagogy of Physical Culture and Sports2664-98372021-08-0125421522410.15561/26649837.2021.04031720Effect of glutathione supplementation on swimmers’ performanceLubomir Petrov0Albena Alexandrova1Mihail Kachaunov2Radoslav Penov3Tanya Sheytanova4Stefan Kolimechkov5National Sports AcademyNational Sports AcademyNational Sports AcademyNational Sports AcademyNational Sports AcademySTK SportBackground and Study Aim. Continuously increasing the volume and intensity of the training sessions often leads to overtraining. It has been demonstrated that glutathione supplementation might improve the aerobic metabolism in skeletal muscle and reduce exercise-induced muscle fatigue. The aim of the study was to assess the effect of glutathione supplementation on fatigue, recovery processes, and competitive results of elite swimmers during a six-week training period. Material and Methods. Twenty-four elite swimmers (10 women and 14 men) from the Bulgarian national swimming team, with a mean age of 18.7±3.78 years, took part in this double-blind placebo control study. The swimmers from the experimental group were supplemented once a day with a capsule of 250mg glutathione, whilst the swimmers from the control group took a placebo once a day. The urine concentration levels of cortisol and cortisone, as well as the degree of overtraining, were evaluated on the 1st(T1), 14th(T2), 28th(T3), and 42nd(T4) days. Anthropometric measurements and a nutritional assessment were performed at T1 and T4. Results. The swimmers showed a gradual decrease of cortisol and cortisone during the study, with significantly lower concentrations in the experimental vs the control group at T4 (19.4 vs 42.5 ng/mL, p < 0.05). At the end of the study, the swimmers from the experimental group showed improvements in their time in 41 out of the 43 swimming events, whilst those from the control group had significantly smaller improvements (-1.66 vs -0.97%, p < 0.05). Conclusions. In conclusion, glutathione supplementation at a dose of 250mg/day for six weeks improves the adaptation of elite swimmers towards training schedules, which is likely to lead to better sports results.https://sportpedagogy.org.ua/index.php/ppcs/article/view/1720glutathionesupplementseliteswimmingperformance |
| spellingShingle | Lubomir Petrov Albena Alexandrova Mihail Kachaunov Radoslav Penov Tanya Sheytanova Stefan Kolimechkov Effect of glutathione supplementation on swimmers’ performance Pedagogy of Physical Culture and Sports glutathione supplements elite swimming performance |
| title | Effect of glutathione supplementation on swimmers’ performance |
| title_full | Effect of glutathione supplementation on swimmers’ performance |
| title_fullStr | Effect of glutathione supplementation on swimmers’ performance |
| title_full_unstemmed | Effect of glutathione supplementation on swimmers’ performance |
| title_short | Effect of glutathione supplementation on swimmers’ performance |
| title_sort | effect of glutathione supplementation on swimmers performance |
| topic | glutathione supplements elite swimming performance |
| url | https://sportpedagogy.org.ua/index.php/ppcs/article/view/1720 |
| work_keys_str_mv | AT lubomirpetrov effectofglutathionesupplementationonswimmersperformance AT albenaalexandrova effectofglutathionesupplementationonswimmersperformance AT mihailkachaunov effectofglutathionesupplementationonswimmersperformance AT radoslavpenov effectofglutathionesupplementationonswimmersperformance AT tanyasheytanova effectofglutathionesupplementationonswimmersperformance AT stefankolimechkov effectofglutathionesupplementationonswimmersperformance |