Introduction: The female diaphragm develops less fatigue after high-intensity exercise compared with males. Diaphragm fatigability is typically defined as a decrease in transdiaphragmatic twitch pressure (Pdi,TW) and represents the contractile function of the muscle. However, it is unclear whether this sex difference persists when examining changes in voluntary activation, which represents a neural mechanism contributing to fatigability.
Purpose: This study aimed to determine if high-intensity cycling results in a decrease in diaphragm voluntary activation (D-VA) and to explore if the decrease in D-VA is different between sexes.
Methods: Twenty-five participants (15 females) completed a single bout of high-intensity constant load cycling. D-VA and Pdi,TW were measured before and after exercise using cervical magnetic stimulation of the phrenic nerves to assess diaphragm fatigability.
Results: Participants were of similar aerobic fitness when expressed relative to predicted values (females: 114% ± 25% predicted, males: 111% ± 11% predicted; P = 0.769). Pdi,TW decreased relative to baseline to 85.2% ± 16.7% and 70.3% ± 12.4% baseline (P = 0.012) in females and males, respectively, immediately after exercise. D-VA also decreased in both females and males immediately after exercise. The decrease in D-VA was less in females compared with males (95.4% ± 4.9% baseline vs 87.4% ± 10.8% baseline, respectively; P = 0.018).
Conclusions: D-VA decreases after whole-body exercise in both females and males, although the magnitude of the decrease is not as large in females compared with males. The findings of this study suggest that the female diaphragm is more resistant to both contractile and neural mechanisms of fatigability after whole-body exercise.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1249/MSS.0000000000002897 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The interplay between lying, sitting, standing, moving, and walking on obesity risk in older adults: a compositional and isotemporal substitution analysis.
BMC Geriatr
December 2024
Faculty of Science, Palacký University Olomouc, Olomouc, Czech Republic.
Introduction: Obesity in older adults is linked to various chronic conditions and decreased quality of life. Traditional physical activity guidelines often overlook the specific postures and movements that older adults engage in daily. This study aims to explore the compositional associations between posture-specific behaviours and obesity risk in younger (M = 67.
View Article and Find Full Text PDFHybrid Service Delivery for voluntary, community and social enterprise organisations working with adults with learning disabilities and/or autism: a realist review protocol.
Syst Rev
December 2024
Centre for Health Promotion Research, School of Health, Leeds Beckett University, Leeds, UK.
Background: Delivery of health and care services using a combination of remote and/or in-person channels and digital and/or traditional tools (Hybrid Service Delivery, HSD) is increasingly seen as a way of improving quality and affordability, improving access, personalisation and sustainability, and reducing inequalities. Across the voluntary, community and social enterprise sector (VCSE), using a combination of remote and/or in-person channels and digital and/or traditional tools (HSD) has enabled the essential provision of services for people who have learning disabilities and/or autistic (LDA). However, it is unclear how different tools and channels have been used, what worked well or not well, for whom, and in what circumstances.
View Article and Find Full Text PDFAbnormality in field physical test predicts a reduced quadriceps strength in patients with hip- or knee-osteoarthritis. A prospective observational study.
PLoS One
December 2024
CHU Clermont Ferrand, Plateforme d'Exploration de la Mobilité, Pôle MOBEX, Université Clermont Auvergne, Clermont-Ferrand, France.
Background: In osteoarthritis quadriceps strength is an important outcome to assess exercise capacity and recovery after arthroplasty. However, its measurement is limited due to lack of time and the need for trained personnel and equipment whose accuracy is verified.
Objectives: To find out the determinants of a reduced quadriceps strength and to establish a score to screen for it.
Point-of-care additive manufacturing: state of the art and adoption in Spanish hospitals during pre to post COVID-19 era.
3D Print Med
December 2024
Diagnostic Imaging Department, Hospital de la Santa Creu i Sant Pau, Sant Antoni Maria Claret 167, 08025, Barcelona, Spain.
Background: 3D technologies [Virtual and Augmented 3D planning, 3D printing (3DP), Additive Manufacturing (AM)] are rapidly being adopted in the healthcare sector, demonstrating their relevance in personalized medicine and the rapid development of medical devices. The study's purpose was to understand the state and evolution of 3DP/AM technologies at the Point-of-Care (PoC), its adoption, organization and process in Spanish hospitals and to understand and compare the evolution of the models, clinical applications, and challenges in utilizing the technology during the COVID-19 pandemic and beyond.
Methods: This was a questionnaire-based qualitative and longitudinal study.
Pilot Study on the Relationship Between Different Lower Limb Raising Velocities and Trunk Muscle Contraction in Active Straight Leg Raise.
J Funct Morphol Kinesiol
December 2024
Department of Physical Therapy, School of Rehabilitation, Biwako Professional University of Rehabilitation, Higashiomi 527-0145, Japan.
Background/objectives: The active straight leg raise requires intricate coordination between the hip, knee, pelvis, and spine. Despite its complexity, limited research has explored the relationship between lower limb raising velocity and trunk muscle motor control during an active straight leg raise in healthy individuals. This study aimed to explore the potential effects of increased lower limb raising velocity on core muscle contractions during active straight leg raises.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!