Results 11 to 20 of about 806,002 (262)

Changes in and the mediating role of physical activity in relation to active school transport, fitness and adiposity among Spanish youth: the UP&DOWN longitudinal study [PDF]

open access: yes, 2020
Background Longitudinal changes in child and adolescent active school transport (AST), and the mediating role of different intensities of daily physical activity (PA) levels in relation to AST and physical fitness and adiposity indicators is unclear ...
Abbott, Gavin   +9 more
core   +3 more sources

The relationship between physical activity, motor competence and health-related fitness in 14-year-old adolescents [PDF]

open access: yes, 2008
Physical activity, physical fitness, and motor competence are important health-related constructs. However, the relationship between them, particularly among children and adolescents, is still unclear.
Hands, Beth P   +4 more
core   +2 more sources

Effects of aging on unloading-induced skeletal muscle atrophy and subsequent recovery in rats

open access: yesJournal of Physical Fitness and Sports Medicine, 2013
Aged individuals with physiological muscle atrophy (sarcopenia) are likely forced into an unloading condition of inactivity such as bed rest and limb-immobilization.
Hideki Yamauchi   +3 more
doaj   +1 more source

Association between school environment with sedentary behavior and physical activity intensity in children

open access: yesScientific Reports, 2023
We examined the association between indicators of the school environment with sedentary behavior and different intensities of physical activity in children.
Diego Sales   +5 more
doaj   +1 more source

A Single Question of Parent-Reported Physical Activity Levels Estimates Objectively Measured Physical Fitness and Body Composition in Preschool Children: The PREFIT Project [PDF]

open access: yes, 2019
Physical inactivity is recognized as a determinant of low physical fitness and body composition in preschool children, which in turn, are important markers of health through the lifespan.
Aadahl   +37 more
core   +7 more sources

Central command and muscle metaboreflex effect on superficial venoconstriction in the resting limb

open access: yesJournal of Physical Fitness and Sports Medicine, 2013
Exercise significantly activates the sympathetic nervous system. Sympathetic activation during exercise is governed by both central command and muscle reflex mechanisms (i.e., muscle metabo- and mechano-reflexes), which modulate arterial vascular ...
Anna Ooue, Tomoko Sadamoto
doaj   +1 more source

Physical activity, screen viewing time, and overweight/obesity among Chinese children and adolescents: an update from the 2017 physical activity and fitness in China—the youth study

open access: yesBMC Public Health, 2019
Background With increases in inactive lifestyles and mounting pressure for academic excellence in Chinese younger populations, lack of physical activity and increased prevalence of obesity have become a major public health concern in China.
Zheng Zhu   +8 more
doaj   +1 more source

Fit Into College: A Program to Improve Physical Activity and Dietary Intake Lifestyles Among College Students [PDF]

open access: yes, 2011
The purpose of this study was to determine whether a 10-week program could improve physical activity, physical fitness, body weight, dietary intake, and perceptions of exercise and diet among college 30 healthy college freshmen. Outcomes were measured at
Conte, Kathleen P.   +7 more
core   +2 more sources

Aerobic exercise enhances mitochondrial homeostasis to counteract D-galactose-induced sarcopenia in zebrafish

open access: yesExperimental Gerontology, 2023
Sarcopenia is a common skeletal muscle degenerative disease characterized by decreased skeletal muscle mass and mitochondrial dysfunction that involves microRNAs (miR) as regulatory factors in various pathways.
Zhang-Lin Chen   +13 more
doaj  

Causation, physics, and fit [PDF]

open access: yesSynthese, 2016
Our ordinary causal concept seems to fit poorly with how our best physics describes the world. We think of causation as a time-asymmetric dependence relation between relatively local events. Yet fundamental physics describes the world in terms of dynamical laws that are, possible small exceptions aside, time symmetric and that relate global time slices.
openaire   +4 more sources

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