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Table 2 Effect of transition from land into a prone swimming body position in water on spirometry findings in 14 elite competitive swimmers. The effect is calculated as percent of the measured change out of the initial value measured on land

From: Swimming-induced changes in pulmonary function: special observations for clinical testing

  Female swimmers N = 7 Male swimmers N = 7 p-value
FEV1 decrease in transition into water % 6.3 (3) 7.7 (3) 0.42
FVC decrease in transition into water % 1.3 (4) 6.2 (4) 0.04*
FEV1/FVC decrease in transition into water % 5.3 (3) 2.2 (5) 0.17
MVV decrease in transition into water % 6.8 (4) 6.6 (5) 0.71
cMVV decrease in transition into water % 6.3 (3.2) 7.9 (3.2) 0.36
  1. *Significant difference, #cMVV (35*FEV1)