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. 2023 Jul 26;15(15):3324. doi: 10.3390/nu15153324

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Study design. Pla: placebo; VitC: vitamin C supplement; Glu: glutathione supplement; VitC+Glu: combined vitamin C and glutathione supplement, GXT: graded exercise test; VO_2max: maximal oxygen uptake; VE: minute ventilation; VO₂: oxygen uptake; VCO₂: carbon dioxide output; RER: respiratory exchange ratio; O₂pulse: oxygen pulse; CHOoxi: carbohydrate oxidation; FAToxi: fat oxidation; EE: energy expenditure; SmO₂: oxidized hemoglobin and myoglobin in skeletal muscle tissue; tHb: total hemoglobin and myoglobin in skeletal muscle tissue; HR: heart rate; SV: stroke volume; CO: cardiac output; EDV: end-diastolic volume; ESV: end-systolic volume; EF: ejection fraction; RPE: ratings of perceived exertion; SOD: superoxide dismutase; GPx: glutathione peroxidase; CAT: catalase; BAP: biological antioxidant potential; dROM: diacron reactive oxygen metabolite.