Table 2. Cardiorespiratory responses to HIIE with different intensities.
HIIE70% HIIE85% HIIE100%
Peak power (W) 87.4 ± 12.2 # 106.1 ± 14.8 * 124.8 ± 17.4 *#
Average HR (bpm) 141 ± 8 # 157 ± 5 * 160 ± 4 *
Average HR (% HRmax) 73 ± 5 # 82 ± 3 * 83 ± 4 *
Peak HR (bpm) 161 ± 6 # 181 ± 4 * 184 ± 2 *#
Peak HR (%HRmax) 83 ± 4 # 94 ± 4 * 96 ± 6 *#
Average O2 (L·min-1) 0.86 ± 0.10 # 0.99 ± 0.08 * 1.03 ± 0.08 *
Average O2 (%O2max) 51 ± 7 # 60 ± 5 * 62 ± 8 *
Peak O2 (L·min-1) 1.21 ± 0.19 # 1.35 ± 0.07 * 1.38 ± 0.04 *
Peak O2 (%O2max) 73 ± 16 # 81 ± 10 * 83 ± 15 *
† Significant difference between 100%HIIE (p < 0.01).
# Significant difference between 85%HIIE (p < 0.01).
* Significant difference between 70%HIIE (p < 0.01).
Values are reported as mean ± standard deviation. Abbreviations: HR, heart rate; HRmax, maximal heart rate; V̇O2, oxygen uptake: V̇O2max, maximal oxygen uptake; %V̇O2max, percentage of maximal oxygen uptake; VT, ventilatory threshold.