Participant characteristics (mean (SD) unless otherwise stated)
| Isometric (n=15) | Isotonic (n=15) | |
| Age (years) | 57.5 (16.8) | 61.1 (15.2) |
| Female | 13 | 14 |
| Height (cm) | 164.4 (7.0) | 159.1 (8.9) |
| Weight (kg) | 74.1 (11.7) | 75.4 (17.6) |
| Body mass index (kg/m2) | 27.7 (4.1) | 29.6 (4.8) |
| Duration of symptoms (months) | 23 (21.4) | 22.9 (28.3) |
| Unilateral symptoms | 13 | 13 |
| Previous steroid injection | 7 | 2 |
| Low back pain | 8 | 10 |
| Groin pain | 3 | 4 |
| Diabetes | 2 | 3 |