Table 2.
Cardiopulmonary exercise parameters (N = 12)
| Baseline | Post‐HIIT | P‐value | |
|---|---|---|---|
| V̇O2peak (mL/kg/min) | 11.9 (9.5, 14.8) | 12 (10, 15) | 0.6 |
| V̇O2 at VT (mL/kg/min) | 7.1 (6.5, 9.1) | 8.5 (7.7, 9.3) | 0.04* |
| Heart rate at VT (b.p.m.) | 100 (86, 109) | 96 (86, 109) | 0.9 |
| Peak heart rate (b.p.m.) | 120 (103, 145) | 109 (97, 141) | 0.3 |
| Respiratory exchange ratio (RER) | 1.3 (1.2, 1.4) | 1.3 (1.16, 1.3) | 0.16 |
| Ventilatory efficiency (VE/VCO2) | 40 (35, 44) | 42 (37, 43) | 0.88 |
| FEV1 (L) | 2.3 (2.1, 2.4) | 2.4 (2.1, 2.6) | 0.7 |
| Work rate at VT (W) | 44 (14, 54) | 55 (21, 66) | 0.054 |
| Peak work rate (W) | 99 (25, 141) | 100 (67, 124) | 0.18 |
| Exercise time (s) | 540 (439, 595) | 528 (391, 633) | 0.33 |
| Peak rate of perceived exertion (RPE) | 16 (14, 17) | 15 (14, 17) | 0.7 |
| HM2 pump speed (r.p.m.) | 9110 ± 363 | 9111 ± 363 | 0.8 |
| HM3 pump speed (r.p.m.) | 5300 ± 216 | 5350 ± 70 | 0.7 |
| HM2 flow increment rest to peak (L/min) | 1.0 (1.0, 1.5) | 1.2 (0.7, 1.8) | 0.8 |
| HM3 flow increment rest to peak (L/min) | 0.7 (0.1, 0.9) | 0.5 (0.2, 0.7) | 0.5 |
| KCCQ overall summary score | 72 (60, 79) | 64 (53, 84) | 0.5 |
| KCCQ physical limitation subscale score | 75 (62, 88) | 75 (62, 92) | 0.51 |
HIIT, high‐intensity interval training; HM2, HeartMate II; HM3, HeartMate 3; KCCQ, Kansas City Cardiomyopathy Questionnaire; RER, respiratory exchange ratio; VCO2, volume of exhaled carbon dioxide; VE, ventilation; VT, ventilatory threshold.
Values are means ± standard deviation or medians (inter‐quartile range: 25th, 75th percentile).
*
Difference of baseline vs. post‐HIIT, P < 0.05.