Key result
Rowing HIIT reduces ALT by ~13 points vs multimodal HIIT in nonobese females.
Why the study?
Little is known regarding the cardiometabolic and psychosocial effects of HIIT using resistance training modalities compared with traditional cardiorespiratory HIIT.
Does multimodal HIIT compared to rowing HIIT improve liver enzymes and wellness in recreationally active females without obesity?
RCT (n=16)
randomized
Does multimodal HIIT compared to rowing HIIT improve liver enzymes and wellness in recreationally active females without obesity?
Mean Difference: 13.16 (95% CI 3.4–22.92)
p-value: p=0.013
Rowing high-intensity interval training may be more effective than multimodal resistance HIIT for improving liver enzymes in non-obese females.
May support rowing over multimodal HIIT for ALT reduction in non-obese active females; extends RCT evidence on exercise modality for hepatic markers.
Background. Single-modality, high-intensity interval training (HIIT) using traditional cardiorespiratory exercise selection has been found to provide similar and sometimes superior cardiometabolic effects compared with moderate-intensity continuous training. However, little is known regarding the cardiometabolic and psychosocial effects of HIIT using resistance training modalities. Therefore, this study aims to compare the effects of HIIT using rowing (R-HIIT) and multimodal HIIT (MM-HIIT) using resistance training on liver enzymes, cardiometabolic risk factors, and psychosocial outcomes. Method. Recreationally active females with a body mass index <30 kg/m2 (N = 16, 23.0 ± 5.9 years) were randomized into a MM-HIIT or R-HIIT group and completed a 12-week HIIT intervention (ClinicalTrials.gov registration number: https://clinicaltrials.gov/ct2/show/NCT03093441) using principles of social cognitive theory (SCT). Participants completed pre- and postintervention measurements on anthropometrics, resting heart rate, blood pressure, blood measures (lipids, liver enzymes, and glucose), exercise self-efficacy, and perceived wellness. Analysis of covariance was used to examine differences in postintervention measures between groups after controlling for baseline values, waist circumference, and waist-to-height ratio. Results. R-HIIT group had significantly decreased alanine aminotransferase (mean difference = 13.16, P = 0.013 , effect size (ES) = 0.44, confidence interval (CI) = 3.40 to 22.92) and aspartate aminotransferase (mean difference = 10.79, P = 0.024 , ES = 0.38, CI = 1.67 to 19.90) levels compared with the M-HIIT group, and the whole group had improved wellness scores (14.72 ± 2.6 to 16.89 ± 2.76, P = 0.002 ). Conclusion. R-HIIT may be an effective preventative method for improving liver health in females without obesity. When using principles of SCT, HIIT may enhance overall well-being.
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Rengers et al. (2021) conducted an RCT in Recreationally active females without obesity (n=16). Rowing high-intensity interval training (R-HIIT) vs. Multimodal high-intensity interval training (MM-HIIT) was evaluated on alanine aminotransferase (MD 13.16, 95% CI 3.40 to 22.92, p=0.013). Rowing high-intensity interval training significantly decreased alanine aminotransferase (MD 13.16; 95% CI 3.40-22.92; P=0.013) compared with multimodal HIIT in females without obesity.
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