Table 2.
Proportion of astronauts that would be expected to have a 20% or greater loss at the first postflight session.
| Endpoint | P20 | 95% Confidence interval | |
|---|---|---|---|
| Muscle strength, power, and size | |||
| Leg Press Work | 17.3 | 7.5 | 36.0 |
| Leg Press Power | 14.5 | 5.8 | 32.7 |
| Bench Press Power | 12.7 | 4.8 | 30.1 |
| Calf CSA | 10.9 | 3.2 | 30.9 |
| Leg Press Force | 8.8 | 2.8 | 24.9 |
| Bench Press Work | 3.6 | 0.9 | 14.3 |
| Bench Press Force | 2.2 | 0.4 | 11.2 |
| Leg Press 1RM | 2.0 | 0.6 | 6.0 |
| Bench Press 1RM | 0.5 | 0.1 | 2.6 |
| Quadricep CSA | 0.1 | 0.0 | 3.8 |
| Hamstring CSA | 0.0 | 0.0 | 2.1 |
| Cardiorespiratory fitness | |||
| Peak Workload | 12.7 | 4.4 | 32.3 |
| VO2peak | 7.3 | 2.3 | 22.2 |
| Ventilation | 6.6 | 1.9 | 21.8 |
| Ventilatory threshold | 0.0 | 0.0 | 2.1 |
| Body composition | |||
| Fat mass | 4.0 | 1.5 | 9.9 |
| BMD trochanter | 0.0 | 0.0 | 0.0 |
| BMD femoral neck | 0.0 | 0.0 | 0.0 |
| BMD total hip | 0.0 | 0.0 | 0.0 |
| BMD L1-L4 | 0.0 | 0.0 | 0.0 |
| Body mass | 0.0 | 0.0 | 0.0 |
| Lean mass | 0.0 | 0.0 | 0.0 |
| Bone Volume | |||
| Trabecula Femoral neck | 14.7 | 5.8 | 32.7 |
| Trabecula Femur | 2.2 | 0.5 | 9.4 |
| Trabecula Trochanter | 1.8 | 0.4 | 8.6 |
| Cortical femoral neck | 0.0 | 0.0 | 0.0 |
| Cortical trochanter | 0.0 | 0.0 | 0.0 |
| Cortical femur | 0.0 | 0.0 | 0.0 |
RM repetition maximum, CSA cross sectional area, VO2peak peak oxygen consumption, BMD bone mineral density
Values are %, 95% confidence interval.