Table 4 Cardiorespiratory parameters before and after long-duration spaceflight with standard of care exercise or Sprint exercise prescription.

From: High intensity training during spaceflight: results from the NASA Sprint Study

 

CON

SPRINT

Preflight

R + 3

R + 30

Preflight

R + 1

R + 30

VO2peak (L min−1)

3.36 ± 0.19

3.12 ± 0.19*

3.32 ± 0.19

3.22 ± 0.23

2.91 ± 0.23*

3.23 ± 0.23

VO2peak (mL kg−1 min−1)

41.8 ± 1.6

39.7 ± 1.6*

41.8 ± 1.6

41.6 ± 1.9

38.2 ± 1.9*

42.0 ± 1.9

Ventilatory threshold (L min−1)

2.22 ± 0.15

1.97 ± 0.15*

2.25 ± 0.15

2.08 ± 0.16

1.79 ± 0.18*

2.00 ± 0.18

Peak workload (W)

302 ± 14

281 ± 14*

304 ± 14

269 ± 17

256 ± 17*

288 ± 17

Peak heart rate (beats min−1)

173 ± 3

174 ± 3

174 ± 3

178 ± 4

176 ± 4

176 ± 4

  1. Data are mean ± SE and were collected approximately 50 days preflight (L-50) and 1 (Sprint) or 3 (CON) days and 30 days postflight (R + 1/R + 3 and R + 30). No group × time interaction effects were detected (P > 0.05). CON control group that performed the ISS standard of care exercise prescription, SPRINT experimental group that performed a high intensity/lower volume exercise prescription.
  2. *Simple main effect for time relative to preflight (P < 0.05).
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