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Table 1 Pulmonary function testing procedure and timing of the testing execution

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

Timing Action
1 h 20 min before testing Preparation of testing equipment. Switch on the K4b2 analyzer
30 min before testing System calibration, flow calibration, special delay calibration
15 min before testing Study subject arrives ready to swim with swimming gear on,
Explaining the testing procedure to the subject
Filling preliminary information on testing program
Starting testing Spirometry testing on land, study subject in sitting body position
2.30 min after starting testing Maximal voluntary ventilation testing on land and immediately transition into water prone swimming body position in water
5 min after starting testing Spirometry testing in water. The study subject float in prone swimming body position. The swimmer has a handgrip on the side of pool deck and keeps the face immersed. The swimmer wears a special swimming nose-clip and keeps a pull-buoy between tights to maintain prone swimming body position and prevent feet from sinking
7.30 min after starting testing Maximal voluntary ventilation testing in water
10 min Swimming, study subject performing programmed swimming exercise, which included 100 m freestyle at competition speed intensity in the end. Ventilation during the test swimming was measured with breath-by-breath method.
0 min after swimming Spirometry testing in water environment the same way as before swimming
2.30 min after swimming Maximal voluntary ventilation testing in a water the same way as before swimming
5 min after swimming Spirometry testing on land, study subject in sitting body position the same way as before
7.30 min after swimming Maximal voluntary ventilation testing on land
10 min after swimming Finishing measurements and removing the testing equipment