The effect of hand-held weights on the physiological responses to walking exercise.

abstract：PURPOSE:The purpose of this study was to determine the effect of thermal stress and hydration status on immune function during exercise. METHODS:Ten trained men completed four cycle ergometer rides at 55% VO2peak under the following conditions: EN (euhydrated neutral; 22 degrees C, 30% RH), DN (dehydrated neutral), EH...

journal_title：Medicine and science in sports and exercise

authors： Mitchell JB,Dugas JP,McFarlin BK,Nelson MJ

更新日期：2002-12-01 00:00:00

abstract：:Endurance performance is a common criterion used to evaluate training or dietary interventions. However, to accurately appraise the effects of an intervention, the endurance performance measure must be reliable. The purpose of the investigation was to establish the reliability of a 1-h endurance performance test. Twen...

journal_title：Medicine and science in sports and exercise

authors： Bishop D

更新日期：1997-04-01 00:00:00

abstract：PURPOSE:The purpose of the current study was to investigate the associations between the GNB3 C825T polymorphism, body fatness and fitness, and blood pressure in a sample of young Korean men. METHODS:A total of 282 apparently healthy Korean men (nonobese N = 152, obese N = 130) aged 19-33 yr participated in the study....

journal_title：Medicine and science in sports and exercise

authors： Lee J,Lee S,Shin S,Kang HS

更新日期：2005-07-01 00:00:00

abstract：PURPOSE:To determine the effects of age, gender, and ethnicity on the predicted aerobic power of youth as they age from 8 to 16 yr. METHODS:The sample was a multicohort group of 2540 African Americans (N = 543) and Caucasians (N = 1997), 1279 (50.4%) girls and 1261 (49.6%) boys. Heights, weights, and sum of skin folds...

journal_title：Medicine and science in sports and exercise

authors： McMurray RG,Harrell JS,Bradley CB,Deng S,Bangdiwala SI

更新日期：2002-01-01 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：:We studied gastric and intestinal function by gastric intubation/intestinal perfusion in six healthy male volunteers to evaluate optimal use of a 6% glucose-electrolyte (GES) solution. Gastric volume, residual volume, emptying rate, and secretion were measured for an initial 763 +/- 19 ml gastric load of GES and at th...

journal_title：Medicine and science in sports and exercise

authors： Duchman SM,Ryan AJ,Schedl HP,Summers RW,Bleiler TL,Gisolfi CV

更新日期：1997-04-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine whether there is a relationship between overall fitness improvement and varying amounts of running and movement mileage. METHODS:Subjects were male U.S. Navy recruits (N = 1703, 25 divisions), ages 17-35 yr (mean age = 20.1 +/- 2.9 yr), who attended boot camp from Apr...

journal_title：Medicine and science in sports and exercise

authors： Trank TV,Ryman DH,Minagawa RY,Trone DW,Shaffer RA

更新日期：2001-06-01 00:00:00

abstract：PURPOSE:Lateral knee osteoarthritis (OA) is common after anterior cruciate ligament reconstruction (ACLR), yet gait characteristics associated with lateral knee OA after ACLR are not well understood. This cross-sectional study aimed to compare knee, trunk, pelvis, hip, and ankle kinematics and moments between people wi...

journal_title：Medicine and science in sports and exercise

authors： Hart HF,Collins NJ,Ackland DC,Cowan SM,Crossley KM

更新日期：2015-11-01 00:00:00

abstract：OBJECTIVE:This study investigated the contributions of physical fitness and body composition to 24-h fat oxidation in adults under sedentary conditions in a whole-room calorimeter. METHODS:The following measurements were studied in 109 adults (49 male/45 female) at least 36 h after a bout of exercise: 1) aerobic fitne...

journal_title：Medicine and science in sports and exercise

authors： Kriketos AD,Sharp TA,Seagle HM,Peters JC,Hill JO

更新日期：2000-04-01 00:00:00

abstract：:It has been postulated that coactivation of antagonist hamstring musculature during active knee extension aids the anterior cruciate ligament (ACL) in maintaining joint stability by exerting an opposing torque to anterior tibial displacement induced by the quadriceps. It was the purpose of this study to compare contra...

journal_title：Medicine and science in sports and exercise

authors： Osternig LR,Caster BL,James CR

更新日期：1995-06-01 00:00:00

abstract：PURPOSE:Blood is a rich source of growth factors that can stimulate fibrocyte migration and help induce neovascular ingrowth. These properties may be able to stimulate a healing response in chronic degeneration of a tendon (tendonosis). The purpose of this study was to assess the biomechanical and histological effects ...

journal_title：Medicine and science in sports and exercise

authors： Taylor MA,Norman TL,Clovis NB,Blaha JD

更新日期：2002-01-01 00:00:00

abstract：:This paper introduces the terminology and application of parameter estimation techniques for clarifying models of pulmonary gas-exchange control dynamics. Results are given of modeled first-order systems, and the extension of such models to higher orders is discussed with examples. It is emphasized that justification ...

journal_title：Medicine and science in sports and exercise

authors： Lamarra N

更新日期：1990-02-01 00:00:00

abstract：:To determine the effects of anabolic steroids on myocardial structure, VO2max, and body composition, experienced age-matched male weight trainers (M age 26.5 yr) who either used (U) (N = 11) or did not use (NU) (N = 13) anabolic steroids were evaluated. Steroid users were tested while off cycle (U-OFF) for at least 8 ...

journal_title：Medicine and science in sports and exercise

authors： Sachtleben TR,Berg KE,Elias BA,Cheatham JP,Felix GL,Hofschire PJ

更新日期：1993-11-01 00:00:00

abstract：:Previous studies have suggested that, for the same power output, arm exercise requires higher oxygen uptake (VO2), carbon dioxide output (VCO2), and ventilation (VE) than leg exercise and that response kinetics are slower. To evaluate these differences, four healthy subjects performed a total of 95 arm cranking tests....

journal_title：Medicine and science in sports and exercise

authors： Casaburi R,Barstow TJ,Robinson T,Wasserman K

更新日期：1992-12-01 00:00:00

abstract：PURPOSE AND METHODS:The isovolumic contractile responsiveness of left ventricular (LV) myocardium to altered extracellular [Ca2+], [Na+], and pacing frequency was examined using perfused hearts (37 degrees C) isolated from sedentary (SED) and treadmill-trained (TR) adult female rats. RESULTS:The suppressive effect of ...

journal_title：Medicine and science in sports and exercise

authors： Lankford EB,Korzick DH,Palmer BM,Stauffer BL,Cheung JY,Moore RL

更新日期：1998-10-01 00:00:00

abstract：PURPOSE:A 20-d 6 degrees head-down tilt bed rest project was conducted to evaluate the effect of dynamic leg press and plantar flexion resistance training on muscle size and function in human plantar flexors (PF) throughout the prolonged bed rest. METHODS:Twelve healthy men participated in this study and were divided ...

journal_title：Medicine and science in sports and exercise

authors： Akima H,Ushiyama J,Kubo J,Tonosaki S,Itoh M,Kawakami Y,Fukuoka H,Kanehisa H,Fukunaga T

更新日期：2003-04-01 00:00:00

abstract：PURPOSE:The present longitudinal study assessed cardiorespiratory capacity and running economy of Olympic athletes over several decades to measure changes in fitness in an elite group during aging. METHODS:Twenty-six male runners training for the 1968 Olympics were recruited. HR, V˙O2max, ventilation, and running econ...

journal_title：Medicine and science in sports and exercise

authors： Everman S,Farris JW,Bay RC,Daniels JT

更新日期：2018-01-01 00:00:00

abstract：:Existing cross-sectional studies on plasma catecholamine activity provide no support for the concept that a markedly high level of aerobic fitness modifies sympathoadrenal response to an acute psychological challenge in humans. In contrast, compromised sympathetic nervous system activity has been observed in individua...

journal_title：Medicine and science in sports and exercise

authors： Sothmann MS,Hart BA,Horn TS

更新日期：1991-07-01 00:00:00

abstract：:The purpose of this study was to determine whether competitive and recreational runners would replicate land training intensity during water immersion (WI) running with (V) and without (NV) a flotation vest and during treadmill running (Tm). Seven female competitive runners (CR) and seven female noncompetitive runners...

journal_title：Medicine and science in sports and exercise

authors： Gehring MM,Keller BA,Brehm BA

更新日期：1997-10-01 00:00:00

abstract：:To determine the factors in daily physical activity that influence the mineral density of the calcaneus, we recorded walking steps and the type and duration of exercise in 43 healthy 26-to 51-yr-old men. Areal (g.cm-2) calcaneal bone mineral density (CBMD) was measured by single energy x-ray densitometry (SXA, Osteon,...

journal_title：Medicine and science in sports and exercise

authors： Hutchinson TM,Whalen RT,Cleek TM,Vogel JM,Arnaud SB

更新日期：1995-05-01 00:00:00

abstract：:Machine learning classification models for accelerometer data are potentially more accurate methods to measure physical activity in young children than traditional cut point methods. However, existing algorithms have been trained on laboratory-based activity trials, and their performance has not been investigated unde...

journal_title：Medicine and science in sports and exercise

authors： Ahmadi MN,Brookes D,Chowdhury A,Pavey T,Trost SG

更新日期：2020-05-01 00:00:00

abstract：:Increased vertical impact loading during running has been associated with a variety of running related injuries including stress fractures, patellofemoral pain, and plantar fasciitis. PURPOSE:The purpose of this study was to examine the acute and long-term effect of a gait retraining program aimed at teaching runners...

journal_title：Medicine and science in sports and exercise

authors： Bowser BJ,Fellin R,Milner CE,Pohl MB,Davis IS

更新日期：2018-12-01 00:00:00

abstract：:Eight older (52 to 62 yr old) post-menopausal and 8 younger (20 to 30 yr old) women were matched with respect to body size, fatness, and maximal oxygen consumption, heat-acclimated, and then exercised at 35 to 40% maximal oxygen consumption in a warm-humid (37 degrees C, 60% relative humidity) environment. Results wer...

journal_title：Medicine and science in sports and exercise

authors： Kenney WL,Anderson RK

更新日期：1988-04-01 00:00:00

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：:Nine male and five female college students were tested on four occasions to determine the effects of various exhaustive weightlifting stimuli on forearm blood flow as measured by strain-gauge plethysmography. Maximum voluntary dynamic wrist curl strength was determined in the first session, which was followed by rando...

journal_title：Medicine and science in sports and exercise

authors： Haslam RW,Cobb RB

更新日期：1983-01-01 00:00:00

abstract：PURPOSE:To investigate the effects of training intensity and duration, through a range representative of training in endurance athletes, on acute recovery of autonomic nervous system (ANS) balance after exercise. METHODS:Nine highly trained (HT) male runners (VO2max 72 +/- 5 mL.kg.min(-1), 14 +/- 3 training hours per ...

journal_title：Medicine and science in sports and exercise

authors： Seiler S,Haugen O,Kuffel E

更新日期：2007-08-01 00:00:00

abstract：PURPOSE:Cold-water immersion (CWI) and whole body cryotherapy (WBC) are widely used recovery methods in an attempt to limit exercise-induced muscle damage, soreness, and functional deficits after strenuous exercise. The aim of this study was to compare the effects of ecologically valid CWI and WBC protocols on postexer...

journal_title：Medicine and science in sports and exercise

authors： Mawhinney C,Low DA,Jones H,Green DJ,Costello JT,Gregson W

更新日期：2017-06-01 00:00:00

abstract：PURPOSE:This study aimed to determine whether physical activity patterns are associated with sleep later at night and if nighttime sleep is associated with physical activity patterns the next day among adult women. METHODS:Women (N = 353) living throughout the United States wore a wrist and a hip accelerometer for 7 d...

journal_title：Medicine and science in sports and exercise

authors： Mitchell JA,Godbole S,Moran K,Murray K,James P,Laden F,Hipp JA,Kerr J,Glanz K

更新日期：2016-10-01 00:00:00

abstract：PURPOSE:To determine substrate utilization and energy expenditure during maximal and submaximal exercise and recovery in adolescents with cystic fibrosis (CF) and healthy age-matched controls (C). METHODS:Ten clinically stable CF patients (four girls, six boys; age = 10-22 yr) were matched by body mass index, age, gen...

journal_title：Medicine and science in sports and exercise

authors： Wideman L,Baker CF,Brown PK,Consitt LA,Ambrosius WT,Schechter MS

更新日期：2009-02-01 00:00:00

abstract：INTRODUCTION/PURPOSE:This study investigated whether the progressive rise in heart rate (HR) and fall in stroke volume (SV) during prolonged, constant-rate, moderate-intensity exercise (cardiovascular drift, CVdrift) in a hot environment is associated with a reduction in VO(2max). METHODS:CVdrift was measured in nine ...

journal_title：Medicine and science in sports and exercise

authors： Wingo JE,Lafrenz AJ,Ganio MS,Edwards GL,Cureton KJ

更新日期：2005-02-01 00:00:00