Baseline characteristics of the included patients
| Variables | All (N=20) | HIIT (n=6) | MICT (n=8) | Usual care (n=6) |
| Median (min–max) | ||||
| Male, n (%) | 17 (85) | 6 (100) | 7 (88) | 4 (67) |
| Age (years) | 59.5 (25–69) | 59.5 (55–67) | 57 (25–68) | 67 (51–69) |
| Weight (kg) | 71 (53–136) | 82 (63.5–118) | 72 (57–136) | 68 (53–114) |
| BMI | 24.3 (20–39) | 26.6 (22.5–35.5) | 24 (20–38) | 23 (21–39) |
| Caucasian, n (%) | 10 (50) | 3 (50) | 4 (50) | 3 (50) |
| Smoking, n (%) | 2 (10) | 0 | 2 (25) | 0 |
| Time in HD (months) | 15 (3–46) | 9.5 (3–46) | 15,5 (3–34) | 15 (4–20) |
| Hb (g/L) | 11 (8–13.2) | 10.65 (8.1–13.2) | 11.1 (8.9–12.3) | 11.05 (9.10–13.0) |
| Aetiology, n (%) | ||||
| Hypertension | 9 (45) | 2 (33) | 3 (38) | 4 (67) |
| Chronic glomerulonephritis | 5 (25) | 2 (33) | 3 (38) | 0 |
| Diabetes mellitus | 4 (20) | 3 (50) | 0 | 1 (17) |
| Polycystic kidney disease | 2 (10) | 0 | 1 (13) | 1 (17) |
| Physical function | ||||
| VO2peak (mL/kg/min) | 14.9 (9.6–33.6) | 14.9 (13.7–19.6) | 14.2 (10.4–33.6) | 14.4 (9.6–21.1) |
| 6MWT (m) | 439.5 (218–658) | 466 (338–658) | 403 (218–598) | 424 (288–498) |
| Walk independently, n (%) | 18 (90) | 6 (100) | 7 (88) | 5 (83) |
| Overall health (1–5)* | 3 (1–4) | 3.5 (2–4) | 3 (2–4) | 2.5 (1–3) |
*Evaluated by COOP-WONCA; 1=best score.
BMI, body mass index; Hb, haemoglobin; HD, haemodialysis;HIIT, high-intensity interval training; MICT, moderate-intensity continuous training; 6MWT, Six min walk test; VO2peak, peak oxygen uptake.