Background: Surgical masks have become an important accessory of physical activity in daily life due to the COVID-19 pandemic.
Aims: To determine the effects of the surgical mask on respiratory gas exchange parameters, dyspnoea, and hemodynamic responses during maximal exercise in different age groups and gender.
Methods: Twenty-six healthy participants between 18 and 65 years (mean 37.35 ± 15.99) performed a maximal exercise test twice randomly, with and without a mask. To determine the respiratory gas exchange parameters (peak oxygen consumption (VO), minute ventilation (V), energy expenditure (EE), respiratory rate), and hemodynamic responses, each participant underwent a maximal exercise test with Bruce protocol on the treadmill. The modified Borg scale (MBS) was used to determine the dyspnoea before and after exercise test.
Results: Test duration (min), metabolic equivalents (MET), VO2 ml/kg/min, respiratory rate, and peak heart rate (HR) of young participants after exercise test with and without a mask were higher than in middle-aged participants (p < 0.01). There was no significant difference between males and females in test duration, VO ml/kg/min, VO ml/min, MET, V l/min, respiratory rate, MBS, and EE in masked tests (p > 0.05).
Conclusion: The surgical mask use affected the maximal exercise capacity of middle-aged participants more than young participants. Although males performed better than females in tests without masks, the decrease in exercise capacity with mask use was greater than in females. Advanced age and male gender may be factors that need more attention during exercise with mask use.
Trial Registration Number And Date: NCT04498546-02/17/2021.
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http://dx.doi.org/10.1007/s11845-021-02861-3 | DOI Listing |
Ultrasound Med Biol
January 2025
Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, USA. Electronic address:
Background: Skeletal muscle echo intensity (EI) is associated with functional outcomes in older adults, but resistance training interventions have shown mixed results. Texture analysis has been proposed as a novel approach for assessing muscle quality, as it captures spatial relationships between pixels. It is unclear whether texture analysis is able to track changes following resistance training.
View Article and Find Full Text PDFSci Prog
January 2025
Department of Trauma and Orthopaedics, NHS Grampian, Aberdeen, UK.
Objective: In this feasibility study, firstly, we aimed to assess whether intramuscular pH (IMpH) could be measured with a glass-tipped electrode. Secondly, we aimed to explore whether we could monitor changes in skeletal muscle pH before and throughout static (isometric) and after dynamic (treadmill) exercise, comparing individuals with intermittent claudication (IC) to a group of healthy controls.
Methods: Forty participants with IC (mean age ± SD) 68 ± 8) and 40 healthy volunteers (63 ± 10) were recruited.
J Appl Physiol (1985)
January 2025
Department of Human Physiology, Gonzaga University, Spokane, Washington, United States.
We tested the hypothesis that power at maximal metabolic steady state is similar between fitness matched men and women. Eighteen participants (9 men, 9 women) performed a cycling graded exercise test for maximal oxygen consumption (V̇O). Men and women were matched for V̇O normalized to fat free mass (FFM), which was 50.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden.
Background: The causes of reduced aerobic exercise capacity (ExCap) in chronic kidney disease (CKD) are multifactorial, possibly involving the accumulation of tryptophan (TRP) metabolites such as kynurenine (KYN) and kynurenic acid (KYNA), known as kynurenines. Their relationship to ExCap has yet to be studied in CKD. We hypothesised that aerobic ExCap would be negatively associated with plasma levels of TRP, KYN and KYNA in CKD.
View Article and Find Full Text PDFPLoS One
January 2025
Centre National de la Recherche Scientifique, Institut des Sciences du Mouvement, Aix-Marseille Univ, Marseille, France.
Little is known about the influence of fatigue in repeated overground sprinting on force-velocity properties in children and adolescents, while this ability to repeat sprints is important for future progress in rugby union. Sprint time decline is commonly used to assess fatigability. However, it does not provide data on biomechanical aspects of sprint performance such as maximal power, force, and velocity production.
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