Activity classification using the GENEA: optimum sampling frequency and number of axes.

abstract：:Many experimental studies have utilized the activity of dopamine-beta-hydroxylase (DBH) as an index of sympathetic activity, since this enzyme is not submitted to uptake mechanisms or to enzymatic metabolism as are the circulating catecholamines norepinephrine (NE) and epinephrine (E). However, large discrepancies hav...

journal_title：Medicine and science in sports and exercise

authors： Péronnet F,Cleroux J,Perrault H,Thibault G,Cousineau D,de Champlain J,Guilland JC,Klepping J

更新日期：1985-12-01 00:00:00

abstract：PURPOSE:This study aimed to determine the effect of acute exercise on the proliferation and expression of activation markers on T-lymphocytes. METHODS:Seventeen well-trained male endurance runners completed 60 min of treadmill running at 95% of ventilatory threshold and a resting, no exercise, control session at the s...

journal_title：Medicine and science in sports and exercise

authors： Green KJ,Rowbottom DG,Mackinnon LT

更新日期：2003-04-01 00:00:00

abstract：PURPOSE:The purposes of this study were 1) to add layers and features to a previously published fully automated algorithm designed to identify children's nocturnal sleep and to exclude episodes of nighttime nonwear/wakefulness and potentially misclassified daytime sleep episodes and 2) to validate this refined sleep al...

journal_title：Medicine and science in sports and exercise

authors： Barreira TV,Schuna JM Jr,Mire EF,Katzmarzyk PT,Chaput JP,Leduc G,Tudor-Locke C

更新日期：2015-05-01 00:00:00

abstract：INTRODUCTION AND PURPOSE:Physical inactivity in postmenopausal women contributes to a rise in atherogenic risk factors associated with the metabolic syndrome. Although regular physical activity positively contributes to health, inactivity progressively increases with age. The Dose Response to Exercise in Women aged 45-...

journal_title：Medicine and science in sports and exercise

authors： Morss GM,Jordan AN,Skinner JS,Dunn AL,Church TS,Earnest CP,Kampert JB,Jurca R,Blair SN

更新日期：2004-02-01 00:00:00

abstract：PURPOSE:This study aimed to test whether incident kidney cancer risk is associated with exercise energy expenditure (i.e., metabolic equivalents, 1 MET) when calculated from distance walked or run. METHODS:Hazard ratios (HR) and 95% confidence intervals (95% CI) from Cox proportional hazard analyses of self-reported p...

journal_title：Medicine and science in sports and exercise

authors： Williams PT

更新日期：2014-02-01 00:00:00

abstract：:MRI is an excellent noninvasive method of diagnosing difficult shoulder problems. Although usually not needed for classic primary impingement syndrome or clinically obvious rotator cuff tears, MRI may be helpful in diagnosing secondary causes of impingement or in some cases involving partial rotator cuff tears. Some s...

journal_title：Medicine and science in sports and exercise

authors： Ertl JP,Kovacs G,Burger RS

更新日期：1998-04-01 00:00:00

abstract：PURPOSE:The purpose of this study was to examine the ability of the SenseWear Pro2 Armband (SWA) to accurately assess energy expenditure in free-living overweight or obese children during a 2-wk period by comparison with energy expenditure measured using the doubly labeled water (DLW) method. A second aim was to examin...

journal_title：Medicine and science in sports and exercise

authors： Catharina Bäcklund,Gunnevi Sundelin,Christel Larsson

更新日期：2010-06-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine whether muscle power, activation time, and neuromuscular stimulation are related to physical activity patterns in older women. METHODS:Forty women (65-84 yr) were assigned to high-active (HA) and low-active (LA) groups on the basis of a historical activity questionnai...

journal_title：Medicine and science in sports and exercise

authors： Laroche DP,Knight CA,Dickie JL,Lussier M,Roy SJ

更新日期：2007-09-01 00:00:00

abstract：PURPOSE:The extent to which the diaphragm is targeted during a bout of inspiratory muscle training (IMT) is unknown. The purpose of this study was to characterize the relative activation patterns of the diaphragm and extradiaphragmatic inspiratory muscles during a bout of IMT and to determine whether diaphragmatic recr...

journal_title：Medicine and science in sports and exercise

authors： Ramsook AH,Koo R,Molgat-Seon Y,Dominelli PB,Syed N,Ryerson CJ,Sheel AW,Guenette JA

更新日期：2016-06-01 00:00:00

abstract：PURPOSE:We asked whether submaximal exercise with chest wall restriction (CWR), as a model of restrictive pulmonary disease, would result in fatigue of the diaphragm in healthy humans. METHODS:To address this question, we used cervical magnetic stimulation of the phrenic nerves along with measures of transdiaphragmati...

journal_title：Medicine and science in sports and exercise

authors： Tomczak SE,Guenette JA,Reid WD,McKenzie DC,Sheel AW

更新日期：2011-03-01 00:00:00

abstract：PURPOSE:Temperature increase, oxidative stress, and inflammatory reactions after endurance exercise were expected to stimulate the synthesis of heat shock proteins (HSP) in peripheral blood leukocytes. Furthermore, it was of interest whether regular endurance training influences HSP expression. METHODS:The expression ...

journal_title：Medicine and science in sports and exercise

authors： Fehrenbach E,Passek F,Niess AM,Pohla H,Weinstock C,Dickhuth HH,Northoff H

更新日期：2000-03-01 00:00:00

abstract：:Aerobic exercise training induces an increase in coronary blood flow capacity that is associated with altered control of coronary vascular resistance and, therefore, coronary blood flow. The relative importance of metabolic, myogenic, endothelium-mediated, and neurohumoral control systems varies throughout the coronar...

journal_title：Medicine and science in sports and exercise

authors： Laughlin MH,Oltman CL,Bowles DK

更新日期：1998-03-01 00:00:00

abstract：INTRODUCTION/PURPOSE:Hyperpnea and hyperinflation have been proposed as contributors to exaggerated energy demands in chronic obstructive pulmonary disease (COPD), yet there are incomplete data on exercise requirements. This study compared total-body energy demands of the internal (unloaded) and external work of cyclin...

journal_title：Medicine and science in sports and exercise

authors： Perrault H,Gravel G,Ofir D,Rittmaster D,Aguilaniu B,Bourbeau J

更新日期：2007-06-01 00:00:00

abstract：PURPOSE:To evaluate effectively interventions to increase physical activity among older persons, reliable and valid measures of physical activity are required that can also detect the expected types of physical activity changes in this population. This paper describes a self-report physical activity questionnaire for o...

journal_title：Medicine and science in sports and exercise

authors： Stewart AL,Mills KM,King AC,Haskell WL,Gillis D,Ritter PL

更新日期：2001-07-01 00:00:00

abstract：PURPOSE:Little is known of the potential long-term gait alterations that occur after an anterior cruciate ligament (ACL) reconstruction. In particular, variables, such as impact loading, which have been previously associated with joint deterioration, have not been studied in walking and running after an ACL reconstruct...

journal_title：Medicine and science in sports and exercise

authors： Noehren B,Wilson H,Miller C,Lattermann C

更新日期：2013-07-01 00:00:00

abstract：PURPOSE:Obesity in adolescence increases the risk for early adult cardiovascular disease. We recently showed that 6 months of diet, exercise, and metformin resulted in reductions in adiposity and that diet/exercise alone reduced proinflammatory factors and intrahepatic fat in pubertal children with uncomplicated obesit...

journal_title：Medicine and science in sports and exercise

authors： Rynders C,Weltman A,Delgiorno C,Balagopal P,Damaso L,Killen K,Mauras N

更新日期：2012-05-01 00:00:00

abstract：:To inform the development of bone-specific physical activity (PA) assessment methods and contribute to bone-specific PA guidelines, accelerometer outcomes that provide the most valid estimates of skeletal loading in adults must be identified. PURPOSE:The aims of this project were two-fold. First, to assess the concur...

journal_title：Medicine and science in sports and exercise

authors： Higgins S,Higgins LQ,Vallabhajosula S

更新日期：2020-11-07 00:00:00

abstract：:The purpose of this study was to compare gastric emptying (GE) responses during intense, prolonged cycling and running. It is important to discern whether gastric emptying (GE) responses are exercise-mode specific, since the findings of cycling and running studies are often compared and applied to one another. Ten mal...

journal_title：Medicine and science in sports and exercise

authors： Houmard JA,Egan PC,Johns RA,Neufer PD,Chenier TC,Israel RG

更新日期：1991-03-01 00:00:00

abstract：:In this study the gross efficiency of swimming was determined in a group of male (N = 6) and female (N = 4) competitive swimmers. The gross efficiency is defined as the ratio of the power output (W) to the power input (W). In a range of swimming velocities (0.95-1.6 m.s-1), the power input (rate of energy expenditure,...

journal_title：Medicine and science in sports and exercise

authors： Toussaint HM,Knops W,De Groot G,Hollander AP

更新日期：1990-06-01 00:00:00

abstract：PURPOSE:Physical activity (PA) associates with cardiovascular autonomic function, but the relationship with lifelong PA is unclear. We hypothesized that lifelong PA would associate with cardiovascular autonomic function in midlife. METHODS:At the age of 46 yr, the subjects of the prospective Northern Finland Birth Coh...

journal_title：Medicine and science in sports and exercise

authors： Kiviniemi AM,Perkiömäki N,Auvinen J,Herrala S,Hautala AJ,Ahola R,Tammelin T,Tulppo MP,Järvelin MR,Korpelainen R,Huikuri HV

更新日期：2016-08-01 00:00:00

abstract：PURPOSE:The purpose of the study was to determine the effect of a home-based cycling program for women with a recent diagnosis of gestational diabetes mellitus (GDM) on aerobic fitness, weight gain, self-reported mobility, attitude, and intentions toward maternal exercise, and obstetric and neonatal outcomes. METHODS:...

journal_title：Medicine and science in sports and exercise

authors： Halse RE,Wallman KE,Dimmock JA,Newnham JP,Guelfi KJ

更新日期：2015-08-01 00:00:00

abstract：PURPOSE:Orienteering athletes must adapt to running on various surfaces, with biomechanics likely contributing to performance. Here, our aims were to identify the effect of athletic status and of surface on the running biomechanics of orienteers. METHODS:Seven elite and seven amateur male orienteers ran 20 m on road, ...

journal_title：Medicine and science in sports and exercise

authors： Hébert-Losier K,Mourot L,Holmberg HC

更新日期：2015-02-01 00:00:00

abstract：:Bicycling is a complex sport in which an athlete's energy cost is related to two principal forces: air resistance when traveling on flat terrain, and gravity when traveling uphill. Both wind tunnel data and physiological measurements suggest that air resistance scales as body mass to about the 1/3 power. Thus, large c...

journal_title：Medicine and science in sports and exercise

authors： Swain DP

更新日期：1994-01-01 00:00:00

abstract：:Maximal lactate steady state (MLSS) refers to the upper limit of blood lactate concentration indicating an equilibrium between lactate production and lactate elimination during constant workload. The aim of the present study was to investigate whether different levels of MLSS may explain different blood lactate concen...

journal_title：Medicine and science in sports and exercise

authors： Beneke R,von Duvillard SP

更新日期：1996-02-01 00:00:00

abstract：:The utility of a biomechanical evaluation of an injury is shown for an incident involving bilateral tibial spiral fractures during skiing. With incorporation of directly measured binding release forces into a biomechanical model, estimates of torques transmitted to the skier's leg were determined. The analysis reveale...

journal_title：Medicine and science in sports and exercise

authors： Zernicke RF

更新日期：1981-01-01 00:00:00

abstract：INTRODUCTION:This study tested the hypothesis that females rely on thermal behavior to a greater extent during and after exercise, relative to males. METHODS:In a 24°C ± 1°C; (45% ± 10% RH) environment, 10 males (M) and 10 females (F) (22 ± 2 yr) cycled for 60 min (metabolic heat production: M, 117 ± 18 W·m; F, 129 ± ...

journal_title：Medicine and science in sports and exercise

authors： Vargas NT,Chapman CL,Sackett JR,Johnson BD,Gathercole R,Schlader ZJ

更新日期：2019-01-01 00:00:00

abstract：PURPOSE:The purpose of this study was to test the hypothesis that stretch-activated ion channel (SAC) function is essential for the repeated bout effect (RBE) in skeletal muscle. Specifically, we investigated if daily injections of streptomycin (a known SAC blocker) would abrogate the muscle's adaptive resistance to th...

journal_title：Medicine and science in sports and exercise

authors： Butterfield TA,Best TM

更新日期：2009-02-01 00:00:00

abstract：BACKGROUND:Recent work has identified deficits in dual-task gait balance control for up to 2 months after adolescent concussion; however, how resumption of preinjury physical activities affects recovery is unknown. PURPOSE:The objective of this study is to examine how return to activity (RTA) affects recovery from con...

journal_title：Medicine and science in sports and exercise

authors： Howell DR,Osternig LR,Chou LS

更新日期：2015-04-01 00:00:00

abstract：:Twelve 9- to 12-year-old children (6 boys, 6 girls) performed four exercise-in-heat (35 degrees C, 45% RH) trials which differed in the composition of the fluids they drank. In each trial, subjects cycled for one 20-min and two 15-min bouts at 50% peak VO2 with 10-min rest periods in between. In a fourth bout, they cy...

journal_title：Medicine and science in sports and exercise

authors： Meyer F,Bar-Or O,MacDougall D,Heigenhauser GJ

更新日期：1995-06-01 00:00:00

abstract：PURPOSE:This study aimed to catalog the relationships between step-based accelerometer metrics indicative of physical activity volume (steps per day, adjusted to a pedometer scale), intensity (mean steps per minute from the highest, not necessarily consecutive, minutes in a day; peak 30-min cadence), and sedentary beha...

journal_title：Medicine and science in sports and exercise

authors： Tudor-Locke C,Schuna JM Jr,Han HO,Aguiar EJ,Green MA,Busa MA,Larrivee S,Johnson WD

更新日期：2017-02-01 00:00:00