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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Use of FFP2 respirator | Active Comparator | Using of FFP2 respirator during the 30 minutes test |
|
| Use of surgical mask | Active Comparator | Using of surgical mask during the 30 minutes test |
|
| no mask | Sham Comparator | The 30 minutes test will be carried out without mask |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| steady intensity aerobic test of 30 minutes long | Diagnostic Test | the use of different type of masks during an aerobic exercise |
|
| Measure | Description | Time Frame |
|---|---|---|
| Inspiratory muscle strength | Inspiratory muscle strength will be measured in mmHg with a Power-breathe device | change from baseline inspiratory muscle strength after the 30 minutes test |
| Measure | Description | Time Frame |
|---|---|---|
| lactate concentrations | lactate concentration will be measured in mmol/L with a Lactate Pro 2 device | change from baseline after 10 minutes, 20 minutes and 30 minutes during the test |
| oxygen saturation |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Davinia Vicente Campos, PhD | Universidad Francisco de Vitoria | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidad Francisco de Vitoria | Pozuelo de Alarcón | Madrid | 28223 | Spain |
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oxygen saturation will be measured in %
| 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 | 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 | 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 | change from baseline after 10 minutes, 20 minutes and 30 minutes during the test |