Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists
Background Exercise increases skeletal muscle reactive oxygen species (ROS) production, which may contribute to the onset of muscular fatigue and impair athletic performance. Mitochondria-targeted antioxidants such as MitoQ, which contains a ubiquinone moiety and is targeted to mitochondria through...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-08-01
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| Series: | Journal of the International Society of Sports Nutrition |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1186/s12970-021-00454-0 |
| _version_ | 1797684947855605760 |
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| author | S. C. Broome A. J. Braakhuis C. J. Mitchell T. L. Merry |
| author_facet | S. C. Broome A. J. Braakhuis C. J. Mitchell T. L. Merry |
| author_sort | S. C. Broome |
| collection | DOAJ |
| description | Background Exercise increases skeletal muscle reactive oxygen species (ROS) production, which may contribute to the onset of muscular fatigue and impair athletic performance. Mitochondria-targeted antioxidants such as MitoQ, which contains a ubiquinone moiety and is targeted to mitochondria through the addition of a lipophilic triphenylphosphonium cation, are becoming popular amongst active individuals as they are designed to accumulate within mitochondria and may provide targeted protection against exercise-induced oxidative stress. However, the effect of MitoQ supplementation on cycling performance is currently unknown. Here, we investigate whether MitoQ supplementation can improve cycling performance measured as time to complete an 8 km time trial. Method In a randomized, double-blind, placebo-controlled crossover study, 19 middle-aged (age: 44 ± 4 years) recreationally trained (VO2peak: 58.5 ± 6.2 ml·kg− 1·min− 1, distance cycled per week during 6 months prior to study enrollment: 158.3 ± 58.4 km) male cyclists completed 45 min cycling at 70% VO2peak followed by an 8 km time trial after 28 days of supplementation with MitoQ (20 mg·day− 1) and a placebo. Free F2-isoprostanes were measured in plasma samples collected at rest, after 45 min cycling at 70% VO2peak and after completion of the time trial. Respiratory gases and measures of rating of perceived exertion (RPE) were also collected. Results Mean completion time for the time trial was 1.3% faster with MitoQ (12.91 ± 0.94 min) compared to placebo (13.09 ± 0.95 min, p = 0.04, 95% CI [0.05, 2.64], d = 0.2). There was no difference in RPE during the time trial between conditions (p = 0.82) despite there being a 4.4% increase in average power output during the time trial following MitoQ supplementation compared to placebo (placebo; 270 ± 51 W, MitoQ; 280 ± 53 W, p = 0.04, 95% CI [0.49, 8.22], d = 0.2). Plasma F2-isoprostanes were lower on completion of the time trial following MitoQ supplementation (35.89 ± 13.6 pg·ml− 1) compared to placebo (44.7 ± 16.9 pg·ml− 1 p = 0.03). Conclusion These data suggest that MitoQ supplementation may be an effective nutritional strategy to attenuate exercise-induced increases in oxidative damage to lipids and improve cycling performance. |
| first_indexed | 2024-03-12T00:38:18Z |
| format | Article |
| id | doaj.art-79f0649356c44b3c9b1182cda7a417a1 |
| institution | Directory Open Access Journal |
| issn | 1550-2783 |
| language | English |
| last_indexed | 2024-03-12T00:38:18Z |
| publishDate | 2021-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of the International Society of Sports Nutrition |
| spelling | doaj.art-79f0649356c44b3c9b1182cda7a417a12023-09-15T09:19:32ZengTaylor & Francis GroupJournal of the International Society of Sports Nutrition1550-27832021-08-0118110.1186/s12970-021-00454-012130263Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclistsS. C. Broome0A. J. Braakhuis1C. J. Mitchell2T. L. Merry3Discipline of Nutrition, School of Medical SciencesDiscipline of Nutrition, School of Medical SciencesSchool of KinesiologyDiscipline of Nutrition, School of Medical SciencesBackground Exercise increases skeletal muscle reactive oxygen species (ROS) production, which may contribute to the onset of muscular fatigue and impair athletic performance. Mitochondria-targeted antioxidants such as MitoQ, which contains a ubiquinone moiety and is targeted to mitochondria through the addition of a lipophilic triphenylphosphonium cation, are becoming popular amongst active individuals as they are designed to accumulate within mitochondria and may provide targeted protection against exercise-induced oxidative stress. However, the effect of MitoQ supplementation on cycling performance is currently unknown. Here, we investigate whether MitoQ supplementation can improve cycling performance measured as time to complete an 8 km time trial. Method In a randomized, double-blind, placebo-controlled crossover study, 19 middle-aged (age: 44 ± 4 years) recreationally trained (VO2peak: 58.5 ± 6.2 ml·kg− 1·min− 1, distance cycled per week during 6 months prior to study enrollment: 158.3 ± 58.4 km) male cyclists completed 45 min cycling at 70% VO2peak followed by an 8 km time trial after 28 days of supplementation with MitoQ (20 mg·day− 1) and a placebo. Free F2-isoprostanes were measured in plasma samples collected at rest, after 45 min cycling at 70% VO2peak and after completion of the time trial. Respiratory gases and measures of rating of perceived exertion (RPE) were also collected. Results Mean completion time for the time trial was 1.3% faster with MitoQ (12.91 ± 0.94 min) compared to placebo (13.09 ± 0.95 min, p = 0.04, 95% CI [0.05, 2.64], d = 0.2). There was no difference in RPE during the time trial between conditions (p = 0.82) despite there being a 4.4% increase in average power output during the time trial following MitoQ supplementation compared to placebo (placebo; 270 ± 51 W, MitoQ; 280 ± 53 W, p = 0.04, 95% CI [0.49, 8.22], d = 0.2). Plasma F2-isoprostanes were lower on completion of the time trial following MitoQ supplementation (35.89 ± 13.6 pg·ml− 1) compared to placebo (44.7 ± 16.9 pg·ml− 1 p = 0.03). Conclusion These data suggest that MitoQ supplementation may be an effective nutritional strategy to attenuate exercise-induced increases in oxidative damage to lipids and improve cycling performance.http://dx.doi.org/10.1186/s12970-021-00454-0rosmitochondriaantioxidantperformanceoxidative stress |
| spellingShingle | S. C. Broome A. J. Braakhuis C. J. Mitchell T. L. Merry Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists Journal of the International Society of Sports Nutrition ros mitochondria antioxidant performance oxidative stress |
| title | Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists |
| title_full | Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists |
| title_fullStr | Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists |
| title_full_unstemmed | Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists |
| title_short | Mitochondria-targeted antioxidant supplementation improves 8 km time trial performance in middle-aged trained male cyclists |
| title_sort | mitochondria targeted antioxidant supplementation improves 8 km time trial performance in middle aged trained male cyclists |
| topic | ros mitochondria antioxidant performance oxidative stress |
| url | http://dx.doi.org/10.1186/s12970-021-00454-0 |
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