Objectives: To compare the effect of low-volume HIIT to moderate-intensity aerobic training (MICT) on fat mass, cardiometabolic profile and physical capacity and confirm its feasibility in older women.
Methods: Inactive older women (60-75 years) were randomly assigned to 8 weeks of either HIIT (75 min/week; n=9) or MICT (150 min/week; n=9). Body composition, fasting metabolic profile, cardiovascular risk (Framingham score), and physical capacity (senior fitness test, VO2peak) were assessed before and after the intervention. Feasibility was evaluated with (training compliance; dropout rate) and (Feeling scale; pre- and post-exercise).
Results: Total cholesterol, non-HDL-C levels and the Framingham risk score decreased in both groups (all ≤0.03). Although VO2peak remained unchanged, the 6MWT distance increased (<0.0001), irrespective of the group. Completion rate and affective responses were not different between groups (all ≥0.38).
Conclusion: A short-term HIIT program is feasible and provides as much benefits as MICT in older women.
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