Acute Physiological Responses to Rope Climbing Ergometer High-Intensity Interval Training in Males and Females

This study aimed to assess the acute physiological responses to a single bout of rope climbing high-intensity interval training (RC-HIIT) and compare the responses between sexes as no data currently exists on this training modality. Following an overnight fast, body composition was assessed, and resting measurements were recorded. Participants then completed an exercise protocol consisting of 10 rounds of maximal effort rope climbing using a 30:60 second work:rest ratio. Gas analysis and heart rate (HR) were recorded continuously. Blood lactate (BLa) was measured following the final work interval. Participants remained seated for 25 minutes post-exercise to assess V̇O₂ recovery. 22 recreationally active participants (11M/11F, 24 ± 7 yrs, 171.5 ± 7.9 cm, 69.9 ± 12.1 kg, 18.9 ± 6.0% body fat) completed the study. Combined average HR during exercise was 141 ± 19 bpm (74.0 ± 10.4% age predicted maximal HR (APMHR)) and peak HR reached 172 ± 17 bpm (90.3 ± 8.8% APMHR). Average exercise V̇O₂ was 18.8 ml/kg/min with peak V̇O₂ values of 27.2 ml/kg/min. Energy expenditure during exercise was 99 ± 28 kcal. Post-exercise BLa was 9.8 ± 3.1 mmol. PACES scores indicated high enjoyment with this modality (101.5 ± 15.9). Average exercise V̇O₂, peak V̇O2, energy expenditure, and post-exercise BLa were greater in males than females (p < 0.05). No sex differences were observed for HR responses or exercise enjoyment. A 15-minute RC-HIIT bout induces HR responses indicative of moderate- to vigorous-intensity exercise in both sexes with greater physiological responses in males compared to females.