Effects of High-Intensity Interval Training Combined with Green Tea Supplementation on Oxidative Balance and Muscular Performance in Overweight Older Men
- 1Assistant Professor, Department of Sport Sciences, Faculty of Literature and Humanities, University of Zabol, Zabol, Iran
- 2MSc in Physical Education, Department of Education, Zahedan, Iran
Abstract
Background and purpose: The use of medicinal plants in combination with exercise has attracted increasing interest, particularly in overweight older adults, because of their potential effects on energy metabolism and oxidative balance. This study investigated the effects of eight weeks of high-intensity interval training (HIIT), with and without green tea supplementation, on oxidative–antioxidative balance and muscular performance in overweight older adults. Materials and methods: This randomised controlled trial used a pretest–posttest design. A total of 48 overweight older men (mean age, 63.7 ± 7.54 years) were recruited through purposive sampling and randomly assigned to four equal groups: HIIT plus green tea supplementation, HIIT plus placebo, green tea supplementation alone, and control (placebo only). The training groups completed HIIT sessions three times per week for eight weeks, while the supplementation groups received two 450 mg green tea capsules daily. Study variables were assessed before and after the intervention. Data were analysed using two-way repeated-measures analysis of variance (ANOVA), followed by Tukey’s post hoc test, with statistical significance set at P≤ 0.05. Results: After eight weeks, serum malondialdehyde (MDA) levels decreased significantly by 23% (P< 0.01), while total antioxidant capacity (TAC) increased significantly by 32% (P< 0.001) in the HIIT plus supplementation group compared with the HIIT plus placebo, supplementation-only, and control groups. The reported interaction among time, exercise, and supplementation was significant for both MDA and TAC (P< 0.001), with greater improvements in these indices in the combined-intervention group than in the other groups. Furthermore, body weight and body fat percentage decreased by 3% and 6%, respectively (both P < 0.001), while muscular strength increased by 10% ( P < 0.02) and muscular endurance increased by 15% (P< 0.03) in the combined-intervention group compared with the supplementation-only and control groups. Conclusion: Combining HIIT with green tea supplementation may offer greater benefits for oxidative balance, body composition, and muscular performance than either intervention alone in overweight older men. (Clinical Trials Registry Number: IRCT20220322054338N5)
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BibTeX
@article{khodakheir2026effects,
title = {{Effects of High-Intensity Interval Training Combined with Green Tea Supplementation on Oxidative Balance and Muscular Performance in Overweight Older Men}},
author = {Javad Nakhzari Khodakheir and Tahereh Rahdari and Elham Ghasemi},
journal = {Journal of Mazandaran University of Medical Sciences},
year = {2026},
month = oct,
note = {CC BY},
}
RIS
TY - JOUR
TI - Effects of High-Intensity Interval Training Combined with Green Tea Supplementation on Oxidative Balance and Muscular Performance in Overweight Older Men
AU - Javad Nakhzari Khodakheir
AU - Tahereh Rahdari
AU - Elham Ghasemi
PY - 2026
DA - 2026/10/01
JO - Journal of Mazandaran University of Medical Sciences
AB - Background and purpose: The use of medicinal plants in combination with exercise has attracted increasing interest, particularly in overweight older adults, because of their potential effects on energy metabolism and oxidative balance. This study investigated the effects of eight weeks of high-intensity interval training (HIIT), with and without green tea supplementation, on oxidative–antioxidative balance and muscular performance in overweight older adults. Materials and methods: This randomised controlled trial used a pretest–posttest design. A total of 48 overweight older men (mean age, 63.7 ± 7.54 years) were recruited through purposive sampling and randomly assigned to four equal groups: HIIT plus green tea supplementation, HIIT plus placebo, green tea supplementation alone, and control (placebo only). The training groups completed HIIT sessions three times per week for eight weeks, while the supplementation groups received two 450 mg green tea capsules daily. Study variables were assessed before and after the intervention. Data were analysed using two-way repeated-measures analysis of variance (ANOVA), followed by Tukey’s post hoc test, with statistical significance set at P≤ 0.05. Results: After eight weeks, serum malondialdehyde (MDA) levels decreased significantly by 23% (P< 0.01), while total antioxidant capacity (TAC) increased significantly by 32% (P< 0.001) in the HIIT plus supplementation group compared with the HIIT plus placebo, supplementation-only, and control groups. The reported interaction among time, exercise, and supplementation was significant for both MDA and TAC (P< 0.001), with greater improvements in these indices in the combined-intervention group than in the other groups. Furthermore, body weight and body fat percentage decreased by 3% and 6%, respectively (both P < 0.001), while muscular strength increased by 10% ( P < 0.02) and muscular endurance increased by 15% (P< 0.03) in the combined-intervention group compared with the supplementation-only and control groups. Conclusion: Combining HIIT with green tea supplementation may offer greater benefits for oxidative balance, body composition, and muscular performance than either intervention alone in overweight older men. (Clinical Trials Registry Number: IRCT20220322054338N5)
SN - 1735-9260
SN - 1735-9279
ER -