Search results for "Exercise."
showing 10 items of 3068 documents
Myocardial bridge pathology and preventable accidents during physical activity of healthy subjects: A case report and a literature review.
2020
Myocardial bridging is a congenital coronary pathology described as a segment of coronary artery which courses through the myocardial wall under the muscle bridge. Although the prognosis of myocardial bridging is benign, sports medicine recognises myocardial bridging as a leading cause of sudden death among young basketball, football and soccer players. The authors report a case of a 42-year-old man who collapsed while playing football. He died notwithstanding prompt medical assistance and cardiopulmonary resuscitation. At autopsy, gross examination of the heart revealed the intramural course of the left anterior descending coronary artery to be 2 cm from its coronary ostial origin. Histol…
αB-crystallin activation in cardiac muscle by acute exercise mirrors the sHSP kinetic in oxidative skeletal muscle fibers: animal and cellular study
2017
Alpha-B-Crystallin (CRYAB), a Small Heat Shock Protein sensitive to oxidative stress, is implicated in various biological processes in many tissues. In cardiac muscle, CRYAB exerts a cardio protective role in ischemia-induced damage preventing apoptosis and necrosis. We aimed to study αB-crystallin’ response in mouse cardiac tissue (H), at different time of recovery from an acute aerobic exercise (1 hour), correlating its modulation with oxidative stress level. We found that a single bout exercise lead to a specific short-term increase of phospho-αB-crystallin level (pCRYAB), without changes of its total expression. Further, the level of 4-hydroxynonenal, a marker of lipidic peroxidation, h…
Updated overview on interplay between physical exercise, neurotrophins, and cognitive function in humans
2019
Highlights • Physical exercise maintains or improves cognitive functions, and neurotrophin receptor signaling may play an important role. • A positive relationship exists between physical exercise and circulating brain-derived neurotrophic factor levels. • Less clear evidence has been found for a relationship between physical exercise and other neurotrophin levels, such as nerve growth factor, neurotrophin-3, and neurotrophin-4. • The postexercise variation of brain-derived neurotrophic factor might be associated with improvement of neurocognitive functioning. • Physical exercise may be an inexpensive and safe strategy for boosting brain-derived neurotrophic factor release, thus preserving …
Increased airway inflammatory cells in endurance athletes: what do they mean?
2003
Inflammatory cells are increased in the airways of endurance athletes, but their role in causing exercise-induced respiratory symptoms and bronchoconstriction, or their possible long-term consequences, are uncertain.To put the results of athlete studies in perspective, by analysing the pathogenesis of airway cell changes and their impact on respiratory function.Athletes of different endurance sports at rest showed increased airway neutrophils. Elite swimmers and skiers also showed large increases in airway eosinophils and lymphocytes, possibly related to chronic, exercise-related exposure to irritants or cold and dry air, respectively. Post-exercise studies reported variable responses of ai…
Determining the optimal maximal and submaximal voluntary contraction tests for normalizing the erector spinae muscles
2019
Background This study aimed to identify which maximum voluntary isometric contraction (MVIC) and sub-MVIC tests produce the highest activation of the erector spinae muscles and the greatest reduction in inter-individual variability, to put them forward as reference normalization maneuvers for future studies. Methods Erector spinae EMG activity was recorded in 38 healthy women during five submaximal and three maximal exercises. Results None of the three MVIC tests generated the maximal activation level in all the participants. The maximal activation level was achieved in 68.4% of cases with the test performed on the roman chair in the horizontal position (96.3 ± 7.3; p < 0.01). Of the fi…
Efectos agudos de una sesión de entrenamiento vibratorio sobre la espasticidad en personas con Esclerosis Múltiple: resultados preliminares.
2020
La esclerosis múltiple (EM) es una enfermedad neurológica progresiva, que conduce a un declive de la función física, siendo la espasticidad uno de los síntomas más recurrentes en esta población. En los últimos años, el entrenamiento vibratorio de cuerpo completo (WBVT) ha mostrado beneficios en la capacidad funcional, la función neuromuscular o la calidad de vida en personas con EM. Sin embargo, los efectos agudos de una sesión de WBVT sobre variables como la espasticidad son todavía desconocidos. Por ello, los objetivos principales de este estudio fueron analizar los efectos agudos del WBVT sobre la espasticidad de la rodilla, así como conocer las diferencias en esta variable entre la pier…
Cross-sectional and longitudinal associations of active travel, organised sport and physical education with accelerometer-assessed moderate-to-vigoro…
2022
Abstract Background Physical activity (PA) declines during childhood. Important sources of PA are active travel, organised sport and physical education (PE), but it is unclear how these domain-specific PA sources contribute to (changes in) daily moderate-to-vigorous PA (MVPA) in young people. This study aimed to examine (1) the cross-sectional association between domain-specific physical activity (i.e., active travel, organised sport and PE) and daily minutes in accelerometer-assessed MVPA; and (2) the longitudinal association between domain-specific physical activity at baseline and change in daily minutes in MVPA. Methods Participants (baseline age 11.3 ± .1.2 years) were drawn from three…
The Effects of Physical Activity on the Gut Microbiota and the Gut-Brain Axis in Preclinical and Human Models: A Narrative Review.
2022
Increasing evidence supports the importance of the gut microbiota (GM) in regulating multiple functions related to host physical health and, more recently, through the gut–brain axis (GBA), mental health. Similarly, the literature on the impact of physical activity (PA), including exercise, on GM and GBA is growing. Therefore, this narrative review summarizes and critically appraises the existing literature that delves into the benefits or adverse effects produced by PA on physical and mental health status through modifications of the GM, highlighting differences and similarities between preclinical and human studies. The same exercise in animal models, whether performed voluntarily or forc…
Estimation of errors in mechanical efficiency
1990
Errors in measurements of mechanical work, net energy expenditure and mechanical efficiency (ME) were calculated, when subjects performed isolated eccentric or concentric muscle actions and combinations of these actions [stretch-shortening cycle (SSC) exercises] with a special sledge apparatus. The relative error of mechanical work was 6.1%. When estimating the error of energy metabolism from oxygen consumption the error would be about 4% (McArdle et al. 1981). The maximum error of ME was the sum of these two values (10.1%). Obviously the error of ME was less than 5%, because 30 muscle actions were averaged and, in addition, the errors of mechanical work and energy expenditure were not in t…
Supervised Physical Training Enhances Muscle Strength but Not Muscle Mass in Prostate Cancer Patients Undergoing Androgen Deprivation Therapy: A Syst…
2019
Introduction: Androgen deprivation therapy (ADT) is considered the basic treatment for advanced prostate cancer, but it is highly associated with detrimental changes in muscle mass and muscle strength. The aim of this meta-analysis was to investigate the effects of supervised physical training on lean mass and muscle strength in prostate cancer patients undergoing ADT. Methods: A systematic literature search was performed using MEDLINE, Embase, and ScienceDirect until October 2018. Only studies that examined both muscle mass and strength in prostate cancer patients undergoing ADT were included. Outcomes of interest were changes in lean body mass (surrogate for muscle mass) as well as upper …