Participant characteristics
| Total | MC | BC | Progestin-Only | |
| N=4594 | N=3870 | N=455 | N=269 | |
| Age (years) | 33.5 (7.3) | 34.1 (7.3) | 29.9 (6.3) | 31.3 (6.2) |
| Weight (kg) | 67.7 (12.3) | 67.8 (12.2) | 65.8 (11.6) | 69.3 (13.5) |
| Height (m) | 1.66 (0.069) | 1.66 (0.070) | 1.65 (0.067) | 1.67 (0.069) |
| BMI (kg/m2) | 24.5 (4.1) | 24.5 (4.2) | 24.0 (3.8) | 24.7 (4.3) |
| RHR (bpm) | 57 (7) | 57 (7) | 59 (7) | 58 (8) |
| Daily strain | 10.9 (2.6) | 10.9 (2.6) | 10.8 (2.3) | 10.8 (2.5) |
| Total hour exercise/week* | 5.5 (3.9) | 5.5 (4.0) | 5.2 (3.5) | 5.1 (3.3) |
| Moderate intensity hour/week | 2.5 (2.1) | 2.5 (2.1) | 2.4 (2.0) | 2.3 (1.8) |
| Vigorous intensity hour/week | 2.0 (1.6) | 2.0 (1.6) | 2.0 (1.6) | 2.0 (1.7) |
*Intensity as defined by the American Heart Association (AHA).38
BC, birth control; BMI, body mass index; ; MC, naturally cycling; RHR, resting heart rate.