Table 1 Ground and inflight body composition and physical activity characteristics of the 11 astronauts
From: Substrate metabolism in male astronauts onboard the International Space Station: the ENERGY study
Ground | Inflight | Changes from ground1 | ||
|---|---|---|---|---|
Mean (SD) | Mean (SD) | Lsmeans (95% CI) | P value | |
Anthropometry and body composition | ||||
Body mass (kg) | 79.4 (10.6) | 78.2 (11.0) | −1.2 (−2.3 to −0.1) | 0.04 |
Body mass index (kg.m−2) | 24.3 (2.1) | 23.9 (2.1) | −0.4 (−0.8 to −0.0) | 0.04 |
Fat-free mass (kg) | 63.8 (8.8) | 62.8 (9.0) | −0.9 (−2.3 to +0.4) | 0.14 |
Fat-free mass index (kg.m−2) | 19.6 (1.9) | 19.3 (2.1) | −0.3 (−0.7 to +0.1) | 0.13 |
Fat mass (kg) | 15.6 (3.9) | 15.3 (5.5) | −0.3 (−2.2 to +1.7) | 0.77 |
Fat-free mass index (kg.m−2) | 4.8 (1.1) | 4.7 (1.5) | −0.1 (−0.7 to +0.5) | 0.70 |
Physical activity | ||||
SWP-derived2 | ||||
Total activity & exercise (min.day−1) | 162 (56) | 175 (48) | 13.2 (−36.8 to +63.2) | 0.56 |
Walking (min.day−1) | 66.7 (34.2) | 3.6 (2.6) | −63.2 (−87.3 to −39.1) | <0.001 |
Running (min.day−1) | 8.11 (10.49) | 14.4 (6.4) | 6.3 (−2.1 to +14.7) | 0.13 |
Inflight training | ||||
Aerobic exercise (min.week−1) | 168 (44) | . | ||
Resistive exercise (rep.week−1) | 1481 (834) | . | ||
