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Abbas Saremi; Mohammad Parastesh; Ahmad Mahdavi
Abstract
Abstract Background: Moderate intensity continuous training (MICT) has been reported as an effective exercise on bone metabolism. However, very few studies have focused on high-intensity interval training (HIIT). The aim of this study was to investigate and compare the effects of HIIT and MICT training ...
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Abstract Background: Moderate intensity continuous training (MICT) has been reported as an effective exercise on bone metabolism. However, very few studies have focused on high-intensity interval training (HIIT). The aim of this study was to investigate and compare the effects of HIIT and MICT training on bone density in middle-aged rats.Methods: 30 male Wistar rats (16 weeks old) were randomly divided into three groups: control, MICT and HIIT. Both test groups completed 8 weeks (5 sessions per week) of treadmill training in which the HIIT group performed 10 sessions of running at a speed of 35-47 m/min with a 2-minute active recovery, and the HIIT group ran continuously for 10-45 minutes at a speed of 15-20 meters per minute. The body composition and bone mineral density in the whole body were evaluated through Dual Xray absorptiometry (DXA) at the beginning and after the intervention. The data was analyzed using SPSS software and one-way analysis of variance and Tukey's post hoc tests.Results: After 8 weeks of intervention, BMD of the whole body and femur increased significantly in both groups (p0≥0.05), although the observed change was greater in the HIIT group (p≥0.05). In addition, in the case of BMD of the lumbar vertebra, no significant difference was observed between all three groups after the intervention (p≤0.05).Conclusion: These findings show that a period of HIIT and MICT training can improve bone density in middle-aged rats and compared to MICT, HIIT had more benefits on bone density.
Abstract
Background: Tea consumption and exercise loading may have favorable effects on risk of osteoporosis. However, effects of tea plus exercise training on bone density are not clear. The aim of this study was to clarify the influence of combined treatment with tea extract and treadmill exercise on bone mineral ...
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Background: Tea consumption and exercise loading may have favorable effects on risk of osteoporosis. However, effects of tea plus exercise training on bone density are not clear. The aim of this study was to clarify the influence of combined treatment with tea extract and treadmill exercise on bone mineral density in middle-aged rats.
Material and Method: Forty male Wistar rats (14 weeks old) were randomized into four groups: control, sham, exercise training and tea plus exercise training. Rats in the exercise groups were participated in a running exercise program (1 h/day, 5 times/ week for 8 weeks). Tea extract were intraperitoneally injected by 0.3 mg/kg. Body composition and bone mineral density of the whole body were assessed by dual-energy X-ray absorptiometry at baseline and after intervention. Data were analyzed using SPSS software using ANOVA and post hoc Tukey test.
Results: Running on treadmill significantly increased femur bone mineral density in rats compared to control group (P=0.04). On the other hand, it was observed that exercise plus tea consumption increased bone mineral density in whole body (P=0.01) and femur (P=0.03) of middle aged rats.
Conclusion: Tea enhanced the bone response to mechanical loading and a synergistic effect was observed in a rat model.