| Full text | |
| Author(s): |
Guardieiro, Natalia Mendes
;
Barreto, Gabriel
;
Marticorena, Felipe Miguel
;
Oliveira, Tamires Nunes
;
de Oliveira, Luana Farias
;
Pinto, Ana Lucia de Sa
;
do Prado, Danilo Marcelo Leite
;
Saunders, Bryan
;
Gualano, Bruno
Total Authors: 9
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHYSICAL ACTIVITY & HEALTH; v. 20, n. 1, p. 10-pg., 2023-01-01. |
| Abstract | |
Purpose: Investigate whether a cloth facemask could affect physiological and perceptual responses to exercise at distinct exercise intensities in untrained individuals. Methods: Healthy participants (n = 35; 17 men, age 30 [4] y, and 18 women, age 28 [5] y) underwent a progressive square wave test at 4 intensities: (1) 80% of ventilatory anaerobic threshold; (2) ventilatory anaerobic threshold; (3) respiratory compensation point; and (4) exercise peak (Peak) to exhaustion, 5-minute stages, with or without a triple-layered cloth facemask (Mask or No-Mask). Several physiological and perceptual measures were analyzed. Results: Mask reduced inspiratory capacity at all exercise intensities (P < .0001). Mask reduced respiratory frequency (P = .001) at Peak (-8.3 breaths-min-1; 95% confidence interval [CI], -5.8 to -10.8), respiratory compensation point (-6.9 breaths-min-1; 95% CI, - 4.6 to -9.2), and ventilatory anaerobic threshold (-6.5 breaths-min-1; 95% CI, -4.1 to -8.8), but not at Baseline or 80% of ventilatory anaerobic threshold. Mask reduced tidal volume (P < .0001) only at respiratory compensation point (-0.5 L; 95% CI, - 0.3 to -0.6) and Peak (-0.8 L; 95% CI, -0.6 to -0.9). Shallow breathing index was increased with Mask only at Peak (11.3; 95% CI, 7.5 to 15.1). Mask did not change HR, lactate, ratings of perceived exertion, blood pressure, or oxygen saturation. Conclusions: A cloth facemask reduced time to exhaustion but had no major impact on cardiorespiratory parameters and had a slight but clinically meaningless impact on respiratory variables at higher intensities. Moderate to heavy activity is safe and tolerable for healthy individuals while wearing a cloth facemask. ClinicalTrials.gov: NCT04887714. (AU) | |
| FAPESP's process: | 21/05847-8 - Placebo effect on sports and cognitive performance after conditioning to caffeine supplementation |
| Grantee: | Felipe Miguel Marticorena |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 16/50438-0 - Nutritional suplementation and exercise to optimize exercise performance: focus on individual responses and a step towards personalized sports nutrition |
| Grantee: | Bryan Saunders |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 20/12036-3 - The influence of the CYP1A2 polymorphism on the physiological responses and performance following acute supplementation with caffeine |
| Grantee: | Gabriel Henrique Castanho Barreto |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 17/13552-2 - Reducing sedentary time in clinical populations: the take a stand for health study |
| Grantee: | Bruno Gualano |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 21/06836-0 - Placebo in sports and exercise: prevalence, conditioning and open-placebo |
| Grantee: | Bryan Saunders |
| Support Opportunities: | Research Grants - Young Investigators Grants - Phase 2 |
| FAPESP's process: | 20/04368-6 - Effect of open-placebo on performance of trained cyclists |
| Grantee: | Tamires Nunes Oliveira |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |