The purpose of this study will be to assess the effects of the use of masks on inspiratory muscle strength, metabolic parameters, heart rate, subjective perception of effort and the sensation of dyspnea before, during and after an aerobic test of 30 minutes long and a fixed load at lactate threshold. A randomized study of repeated measures will be carried out. A total sample of 35 active participants will be recruited. All participants will carried out a lactate threshold test and then 3 visits to the laboratory (separated at least 48 hours from each other) in order to perform 3 test of 30 minutes long without mask, with a surgical mask or with a FFP2 respirator (in a randomized order) at an intensity around lactate threshold intensity. Maximal inspiratory pressure, oxygen saturation, heart rate, blood lactate concentration, subjective perception of effort and dyspnea will be assessed before, during and after the 3 fixed intensity tests.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
30
the use of different type of masks during an aerobic exercise
Universidad Francisco de Vitoria
Pozuelo de Alarcón, Madrid, Spain
Inspiratory muscle strength
Inspiratory muscle strength will be measured in mmHg with a Power-breathe device
Time frame: change from baseline inspiratory muscle strength after the 30 minutes test
lactate concentrations
lactate concentration will be measured in mmol/L with a Lactate Pro 2 device
Time frame: change from baseline after 10 minutes, 20 minutes and 30 minutes during the test
oxygen saturation
oxygen saturation will be measured in %
Time frame: change from baseline after 10 minutes, 20 minutes and 30 minutes during the test
heart rate
heart rate will be measured in beats per minute with a polar H10 device
Time frame: change from baseline after 10 minutes, 20 minutes and 30 minutes during the test
rate of perceived effort
rate of perceived effort will be obtained through the Borg´ scale
Time frame: change from baseline after 10 minutes, 20 minutes and 30 minutes during the test
sensation of dyspnea
sensation of dyspnea will be obtained through a visual analog scale from 0 to 10 points
Time frame: change from baseline after 10 minutes, 20 minutes and 30 minutes during the test
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