Explosive force and fractionated reaction time in elderly low- and high-active women.

abstract：INTRODUCTION:Increased sedentary behavior predicts greater cardiovascular morbidity and mortality and does so independently of physical activity (PA). This association is only partially explained by body mass index (BMI) and overall body fat, suggesting mechanisms besides general increased adiposity. The purpose of thi...

journal_title：Medicine and science in sports and exercise

authors： Larsen BA,Allison MA,Kang E,Saad S,Laughlin GA,Araneta MR,Barrett-Connor E,Wassel CL

更新日期：2014-03-01 00:00:00

abstract：PURPOSE:To determine whether a low-cost, commercially available global positioning system (GPS) can be used to study outdoor walking of healthy subjects, allowing the detection of walking and resting (nonwalking) periods and the accurate estimation of speed and distance of each walking periods. METHODS:The same EGNOS-...

journal_title：Medicine and science in sports and exercise

authors： Le Faucheur A,Abraham P,Jaquinandi V,Bouyé P,Saumet JL,Noury-Desvaux B

更新日期：2007-09-01 00:00:00

abstract：INTRODUCTION:Arterialization of venous gas emboli (VGE) formed after surfacing from SCUBA diving can become arterial gas emboli (AGE) through intrapulmonary arterial-venous anastomoses that open with exercise. METHODS:We recruited twenty patent foramen ovale-negative SCUBA divers and conducted a field and a laboratory...

journal_title：Medicine and science in sports and exercise

authors： Barak OF,Madden D,Lovering AT,Lambrechts K,Ljubkovic M,Dujic Z

更新日期：2015-09-01 00:00:00

abstract：INTRODUCTION:Recent data indicate a direct relationship between the sympathetic nervous system and bone metabolism. The purpose of this study was to evaluate the effects of a beta-1 adrenergic (Adrb1) agonist, dobutamine (DOB), on disuse-induced changes in bone integrity during 28 d of hindlimb unloading (HU). METHODS...

journal_title：Medicine and science in sports and exercise

authors： Swift JM,Hogan HA,Bloomfield SA

更新日期：2013-09-01 00:00:00

abstract：PURPOSE:Little is known about whether acute exercise affects signs or symptoms of attention deficit/hyperactivity disorder (ADHD) in adults. This experiment sought to determine the effects of a single bout of moderate-intensity leg cycling exercise on measures of attention, hyperactivity, mood, and motivation to comple...

journal_title：Medicine and science in sports and exercise

authors： Fritz KM,O'Connor PJ

更新日期：2016-06-01 00:00:00

abstract：:The purpose of this study was to determine the feasibility of using a 6" digital caliper and a 20x viewing microscope to measure hematocrit (HCT) from microhematocrit tubes. The reliability and validity of the digital caliper technique (DC) was simultaneously compared with that of the conventional "turntable" style mi...

journal_title：Medicine and science in sports and exercise

authors： Kelly ME,Luetkemeier MJ,Pantalos GM

更新日期：1994-05-01 00:00:00

abstract：PURPOSE:Female athletes often demonstrate changes in cardiac dimensions that are less prominent than in male athletes, and results from longitudinal studies are conflicting. The atrioventricular plane displacement (AVPD) in the heart is used as an index of left ventricular systolic function with the assumption that it ...

journal_title：Medicine and science in sports and exercise

authors： Slørdahl SA,Madslien VO,Støylen A,Kjos A,Helgerud J,Wisløff U

更新日期：2004-11-01 00:00:00

abstract：:Forces that are repeatedly applied to the body could lead to positive remodeling of a structure if the forces fall below the tensile limit of the structure and if sufficient time is provided between force applications. On the other hand, an overuse injury could result if there is inadequate rest time between applied f...

journal_title：Medicine and science in sports and exercise

authors： Hreljac A

更新日期：2004-05-01 00:00:00

abstract：PURPOSE:To determine the reliability and validity of the School Health Action, Planning and Evaluation System (SHAPES) physical activity questionnaire, a machine-readable questionnaire designed to collect data from all students in a school from grades 6 to 12 and to provide feedback to the school for planning and evalu...

journal_title：Medicine and science in sports and exercise

authors： Wong SL,Leatherdale ST,Manske SR

更新日期：2006-09-01 00:00:00

abstract：:Since many physiological, metabolic, and endocrine changes that occur during pregnancy are evident even at rest, the alterations found during exercise may not necessarily be the same as those found in the normal population. Nonetheless, the exercise-induced cardiopulmonary changes are essentially normal or slightly ex...

journal_title：Medicine and science in sports and exercise

authors： Gorski J

更新日期：1985-08-01 00:00:00

abstract：:Ten highly trained endurance athletes were studied to determine the effects of exposure to low ozone (O3) concentrations on simulated competitive endurance performance and associated physiological and subjective symptom responses. Each subject was randomly exposed to filtered air (FA), and to 0.12, 0.18, and 0.24 ppm ...

journal_title：Medicine and science in sports and exercise

authors： Schelegle ES,Adams WC

更新日期：1986-08-01 00:00:00

abstract：:This study characterizes exercise-induced lipid peroxidation during graded aerobic exercise in seven healthy men and women (36.4 +/- 3 yr). Levels of ethane and pentane in expired breath during cardiopulmonary exercise stress testing were measured at rest, lactic acidosis threshold (LAT), maximal exercise (VO2max), an...

journal_title：Medicine and science in sports and exercise

authors： Leaf DA,Kleinman MT,Hamilton M,Barstow TJ

更新日期：1997-08-01 00:00:00

abstract：PURPOSE:Cardiac aldosterone might be involved in the deleterious effects of nandrolone decanoate (ND) on the heart. Therefore, we investigated the involvement of cardiac aldosterone, by the pharmacological block of AT1 or mineralocorticoid receptors, on cardiac hypertrophy and fibrosis. METHODS:Male Wistar rats were r...

journal_title：Medicine and science in sports and exercise

authors： Do Carmo EC,Fernandes T,Koike D,Da Silva ND Jr,Mattos KC,Rosa KT,Barretti D,Melo SF,Wichi RB,Irigoyen MC,de Oliveira EM

更新日期：2011-10-01 00:00:00

abstract：PURPOSE:Strain magnitude is known to be a primary determinant of the osteogenic response to loading. However, whether bone adaptation to muscle loading is determined primarily by load magnitude is unclear. The purpose of this study was to determine the contribution of load magnitude from muscle action on the site-speci...

journal_title：Medicine and science in sports and exercise

authors： Hawkins SA,Schroeder ET,Wiswell RA,Jaque SV,Marcell TJ,Costa K

更新日期：1999-09-01 00:00:00

abstract：INTRODUCTION:The primary purpose of this study was to evaluate variability of sedentary behavior (SB) throughout a 7-d measurement period and to determine if <7 d of SB measurement would be comparable with the typical 7-d measurement period. METHODS:Retrospective data from Ball State University's Clinical Exercise Phy...

journal_title：Medicine and science in sports and exercise

authors： Donaldson SC,Montoye AH,Tuttle MS,Kaminsky LA

更新日期：2016-04-01 00:00:00

abstract：PURPOSE:Maternal obesity is known to predispose the offspring to impaired glucose metabolism and obesity associated with low-grade inflammation and hypothalamic dysfunction. Because preventive approaches in this context are missing to date, we aimed to identify molecular mechanisms in the offspring that are affected by...

journal_title：Medicine and science in sports and exercise

authors： Bae-Gartz I,Janoschek R,Kloppe CS,Vohlen C,Roels F,Oberthür A,Alejandre Alcazar MA,Lippach G,Muether PS,Dinger K,Ferrari N,Graf C,Dötsch J,Hucklenbruch-Rother E

更新日期：2016-05-01 00:00:00

abstract：PURPOSE:The asthmatic airway responds to exercise by bronchodilation (BD) during and bronchoconstriction (BC) after exercise. A refractory period induced by an initial exercise challenge that provides protection against BC during a subsequent exercise bout has also been observed. However, no studies examining during-ex...

journal_title：Medicine and science in sports and exercise

authors： Rundell KW,Spiering BA,Judelson DA,Wilson MH

更新日期：2003-01-01 00:00:00

abstract：:The purpose of the present investigation was to examine the wet suit effect on 8 swimmers and 8 triathletes. For swimmers, the performances of a 400-m swim with and without wet suit were not statistically different (4 min 12.5 +/- 8 s vs 4 min 13.9 +/- 4 s) while for triathletes the swim times were reduced by 19 s (4 ...

journal_title：Medicine and science in sports and exercise

authors： Chatard JC,Senegas X,Selles M,Dreanot P,Geyssant A

更新日期：1995-04-01 00:00:00

abstract：:A primary goal of studies of successful aging is to identify the modifiable factors related to the plasticity of higher physical function; however, little is known about the relationship between habitual physical activity (especially that of lower- to moderate-intensity) and the maintenance of day-to-day functioning i...

journal_title：Medicine and science in sports and exercise

authors： DiPietro L

更新日期：1996-05-01 00:00:00

abstract：:Since the first reported use of knee braces for prophylactic purposes in 1979, these braces have gone through a period of widespread popularity and use, followed by increasing skepticism as to their effectiveness. Early use was unsupported by significant clinical or laboratory data. Multiple studies regarding prophyla...

journal_title：Medicine and science in sports and exercise

authors： Johnston JM,Paulos LE

更新日期：1991-07-01 00:00:00

abstract：PURPOSE:Overtraining is primarily related to sustained high load training, often coupled with other stressors. Studies in animal models have suggested that unremittingly heavy training (monotonous training) may increase the likelihood of developing overtraining syndrome. The purpose of this study was to extend our prel...

journal_title：Medicine and science in sports and exercise

authors： Foster C

更新日期：1998-07-01 00:00:00

abstract：:Heavy whole-body exercise, requiring a 10- to 15-fold increase in minute ventilation, encroaches on the capacities of the respiratory muscle system to respond. Recently, using the technique of bilateral phrenic nerve stimulation, it has been shown that heavy endurance exercise (> 85% of VO2max) lasting > 8-10 min caus...

journal_title：Medicine and science in sports and exercise

authors： Johnson BD,Aaron EA,Babcock MA,Dempsey JA

更新日期：1996-09-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine whether increased intraluminal pressure is the damaging factor that reduces flow-mediated dilation (FMD) in young, healthy subjects after resistance exercise to maximal exertion. HYPOTHESIS:Attenuating the rise in brachial artery pressure during weight lifting by plac...

journal_title：Medicine and science in sports and exercise

authors： Buchanan CE,Kadlec AO,Hoch AZ,Gutterman DD,Durand MJ

更新日期：2017-04-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine whether similar patterns of quadriceps dysfunction are observed when people with anterior cruciate ligament (ACL) deficiency perform static and dynamic tasks. METHODS:EMG data were collected from 15 subjects with an ACL deficient knee and 15 uninjured subjects as they...

journal_title：Medicine and science in sports and exercise

authors： Williams GN,Barrance PJ,Snyder-Mackler L,Buchanan TS

更新日期：2004-07-01 00:00:00

abstract：:The purposes of this investigation were to compare selected gait parameters characteristic of running without respiratory apparatus on a treadmill (NOR) with those displayed while wearing a mouthpiece-breathing valve apparatus (MP) and while wearing a respiratory face mask (MASK), and to compare the running economy (R...

journal_title：Medicine and science in sports and exercise

authors： Siler WL

更新日期：1993-02-01 00:00:00

abstract：PURPOSE:The effects of chronic eccentric-only versus concentric-only exercise on muscle physiology and blood biochemistry were investigated. METHODS:Twenty women performed on an isokinetic dynamometer a concentric (n = 10;mean ± SEM: age = 21.0 ± 0.4 yr, body fat = 22.0% ± 0.9%) or an eccentric (n = 10, age = 20.0 ± 0...

journal_title：Medicine and science in sports and exercise

authors： Paschalis V,Nikolaidis MG,Theodorou AA,Panayiotou G,Fatouros IG,Koutedakis Y,Jamurtas AZ

更新日期：2011-01-01 00:00:00

abstract：PURPOSE:To compare the effects of different patterns of regular brisk walking on fitness, risk factors for cardiovascular disease, and psychological well-being in previously sedentary adults. METHODS:Twenty-one subjects (14 women), aged 44.5 +/- 6.1 yr (mean +/- SD) were randomly assigned to two different, 6-wk progra...

journal_title：Medicine and science in sports and exercise

authors： Murphy M,Nevill A,Neville C,Biddle S,Hardman A

更新日期：2002-09-01 00:00:00

abstract：PURPOSE:Increased serum testosterone (TST) occurs in response to resistance exercise and is associated with increased muscle mass. However, the effects of elevated TST and sequential resistance exercise bouts on androgen receptor (AR) expression in humans are not well known. This study examined three sequential bouts o...

journal_title：Medicine and science in sports and exercise

authors： Willoughby DS,Taylor L

更新日期：2004-09-01 00:00:00

abstract：PURPOSE:The purpose of the study was to explore the utility of school- and county-level variables in explaining variability in children and adolescent body mass index (BMI). METHODS:BMI data from nearly 2.5 million of children and adolescents were aggregated at the school level from more than 5000 schools in Texas. Sc...

journal_title：Medicine and science in sports and exercise

authors： Bai Y,Welk GJ

更新日期：2017-09-01 00:00:00

abstract：:The uptake of zinc (Zn) into the plasma after the ingestion of 25 mg of Zn from multivitamin-mineral supplement was studied in 10 men during running (R) and control (C) conditions; the R was for 2 h at 60-65% of their maximal oxygen uptake. Subjects took the supplement with 200 ml of deionized water before the R or C ...

journal_title：Medicine and science in sports and exercise

authors： Singh A,Moses FM,Smoak BL,Deuster PA

更新日期：1992-04-01 00:00:00