Table 2.

Static lung volumes and capacities at baseline and after exercise in a dehydrated state, exercise in a euhydrated state, and a time-matched rest period

DehydrationControlRest
TLC, liters
    Baseline6.70 ± 1.586.72 ± 1.556.72 ± 1.66
    60 min post6.74 ± 1.616.66 ± 1.626.71 ± 1.59
FRC, liters
    Baseline3.40 ± 0.993.46 ± 1.023.49 ± 0.97
    60 min post3.65 ± 0.90*C3.35 ± 0.95R3.55 ± 1.02
RV, liters
    Baseline1.73 ± 0.461.76 ± 0.451.77 ± 0.55
    60 min post1.99 ± 0.57*C1.74 ± 0.511.81 ± 0.59
ERV, liters
    Baseline1.67 ± 0.641.71 ± 0.671.72 ± 0.61
    60 min post1.67 ± 0.481.61 ± 0.561.74 ± 0.66
RV/TLC, %
    Baseline25.9 ± 2.926.1 ± 2.526.2 ± 3.1
    60 min post29.3 ± 2.9*C26.1 ± 3.026.8 ± 4.5
  • Values are means ± SD for 10 participants. TLC, total lung capacity; FRC, functional residual capacity; RV, residual volume; ERV, expiratory reserve volume.

  • * P < 0.05 vs. baseline;

  • C P < 0.05 vs. control at corresponding time point;

  • R P < 0.05 vs. rest at corresponding time point.