Results 251 to 260 of about 3,747,500 (296)

Tissue Adaptation to Physical Stress: A Proposed “Physical Stress Theory” to Guide Physical Therapist Practice, Education, and Research

Physical Therapy, 2002
AbstractThe purpose of this perspective is to present a general theory—the Physical Stress Theory (PST). The basic premise of the PST is that changes in the relative level of physical stress cause a predictable adaptive response in all biological tissue.
Michael J, Mueller, Katrina S, Maluf
openaire   +2 more sources

Physical activity and stress in adult Hispanics

Journal of the American Association of Nurse Practitioners, 2015
Physical inactivity and obesity are major U.S. health concerns. Hispanics have higher rates of obesity and lower incidence of meeting physical activity (PA) recommendations, however most studies on PA focus on non-Hispanic Whites. This study examined type and amount of physical activities, and their relationship to age, BMI, employment, and stress in ...
Jean, Hannan, Dorothy, Brooten, JoAnne M, Youngblut, Ivette, Hildago, Rosa, Roche, Lynn, Seagrave   +5 more
openaire   +2 more sources

Physics of Stressed Solids

The Journal of Chemical Physics, 1940
The internal energy of a system is subdivided into a work or potential function and a thermal or kinetic function, the former expressed in terms of the current electrostatic theory of intercrystalline bonding, and these functions then examined for variations of temperature, hydrostatic pressure, unidirectional stress and combined hydrostatic and ...
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Physics of Stress Measurements

2010
Stresses cannot be measured directly. Stress determination is made indirectly, e.g. by the measurement of strain. Deformation values obtained from an unbalanced body approaching equilibrium in combination with theoretical knowledge about constitutive behaviour (stress-strain relationship) allows us to evaluate the state of stress existing in any ...
Arno Zang, Ove Stephansson
openaire   +1 more source

Physical Countermeasures to Stress

2011
Since the beginning of manned spaceflight, the challenge for space science is to avoid or minimize physiological degeneration processes of the musculoskeletal and cardiovascular system caused by missing gravity. With ongoing mission it became clear that weightlessness and isolation in space has an impact also on cognitive performance and mood.
Vera Abeln, Stefan Schneider
openaire   +1 more source

The Variation of Hand Steadiness with Physical Stress

Journal of Motor Behavior, 1981
The performance of 12 subjects in a hand steadiness task was compared at different work loads. Hand steadiness expressed in the form of values of hand shakiness was found not to increase linearly with work intensity. On the contrary, the relation between hand shakiness and activation level, induced by physical work, was found to be positively ...
G, Borg, H, Sjöberg
openaire   +2 more sources

Physical Fitness: A Buffer against Stress

Perceptual and Motor Skills, 1986
The purpose of this study was to determine the extent to which physically fit and unfit persons differ regarding levels of stress in their lives. The six Kraus-Weber tests were employed to assess minimal muscular function and fitness among 4,628 adult males, and a 10-item Likert-type inventory was administered to measure perceived stress.
L A, Tucker, G E, Cole, G M, Friedman
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The electrocardiogram during emotional and physical stress

International Journal of Psychophysiology, 1985
The electrocardiographic response pattern during exercise at low and high heart rate was compared with the response pattern during emotional stress. Qualitative differences between exercise and emotional stress were obtained, i.e. during exercise the ST segment was more depressed, T-wave amplitudes were larger and QT and PQ were significantly shorter ...
T H, Hijzen, J L, Slangen
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[Physical factors and stress].

Meditsina truda i promyshlennaia ekologiia, 2002
Physical factors of occupational environment and surroundings (noise, vibration, non-ionizing electromagnetic radiation, microclimate, etc) frequently could be considered stressing hazards, as cause marked functional changes in cardiovascular and nervous systems, in hematologic, immune and cytochemical values.
G A, Suvorov, Iu P, Pal'tsev, L V, Prokopenko, L V, Pokhodzeĭ, N B, Rubtsova, G I, Tikhonova   +5 more
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On the Significance of Magnesium in Extreme Physical Stress

Cardiovascular Drugs and Therapy, 1998
In a double-blind randomized study, 23 competitive triathletes competing in an event consisting of a 500-meter swim, a 20-km bicycle race, and a 5-km run were studied after 4-week supplementation with placebo or 17 mmol/d Mg orotate. The tests were carried out without a break.
S W, Golf, S, Bender, J, Grüttner
openaire   +2 more sources