Body position and immersion associate with lung function differently in healthy and asthmatic endurance athletes

Endurance athlete's FVC, FEV₁, and FEF_25-75% appear to decrease primarily in response to hydrostatic pressure, while PEF decreases mainly in response to the change in body position. FVC in allergic athletes, and FEV₁, and FEF_25-75% in asthmatic athletes appear to decrease mainly in response to the change in body position, and PEF decreases mainly in response to hydrostatic pressure. The specific effects in response to allergy and asthma appear to accumulate with the overall effects, leading to differences from the on-land seated condition to the other three positions, but no difference among the later three positions.