Changes in cardiorespiratory fitness in 9- to 10.9-year-old children: SportsLinx 1998-2010.

abstract：PURPOSE:Exercise improves the diagnostic performance of ankle-to-brachial index (ABI) in the detection of exercise-induced arterial endofibrosis (EIAE). Pressure values for all four limbs are required to calculate ABI, but rapid systemic pressure changes occur during the recovery period from exercise. We checked whethe...

journal_title：Medicine and science in sports and exercise

authors： Le Faucheur A,Noury-Desvaux B,Jaquinandi V,Louis Saumet J,Abraham P

更新日期：2006-11-01 00:00:00

abstract：:The way in which athletes achieve the necessary height to accomplish the rotational requirements of springboard dives was investigated by focusing upon the take-offs of dives from the forward and reverse groups. Films of eight women in the 3-m final of the 1982 Canadian championship and of five men practicing for the ...

journal_title：Medicine and science in sports and exercise

authors： Miller DI,Munro CF

更新日期：1984-06-01 00:00:00

abstract：PURPOSE:Reducing ice friction was one of the motives for developing the klapskate. However, the magnitude of power dissipation that occurs with conventional skates when a skater plantar flexes his ankle and the tip of the blade is pressed into the ice has not been quantified previously. In this study, we examine how ic...

journal_title：Medicine and science in sports and exercise

authors： Houdijk H,Wijker AJ,De Koning JJ,Bobbert MF,De Groot G

更新日期：2001-03-01 00:00:00

abstract：PURPOSE:We aimed to evaluate in a longitudinal study the effect of intensive training on cardiac autonomic control in athletes using 24-h heart rate variability analysis. METHODS:Time and frequency domain measures of heart rate variability were calculated from 24-h Holter monitoring in 15 high level bicyclists (mean a...

journal_title：Medicine and science in sports and exercise

authors： Bonaduce D,Petretta M,Cavallaro V,Apicella C,Ianniciello A,Romano M,Breglio R,Marciano F

更新日期：1998-05-01 00:00:00

abstract：PURPOSE:We examined the effect of electric fan use on cardiovascular and thermoregulatory responses of nine young (26 ± 3 yr) and nine aged (68 ± 4 yr) adults exposed to extreme heat and humidity. METHODS:While resting at a temperature of 42°C, relative humidity increased from 30% to 70% in 2% increments every 5 min. ...

journal_title：Medicine and science in sports and exercise

authors： Gagnon D,Romero SA,Cramer MN,Kouda K,Poh PYS,Ngo H,Jay O,Crandall CG

更新日期：2017-11-01 00:00:00

abstract：PURPOSE:This study examined the direct, moderating, and indirect effects of dispositional optimism on the prediction of, and athletes' responses to, injury. METHODS:A 2-yr longitudinal design was conducted with a baseline sample of 694 asymptomatic participants (389 men, 305 women; mean ± SD age = 19.17 ± 1.69 yr), 10...

journal_title：Medicine and science in sports and exercise

authors： Wadey R,Evans L,Hanton S,Neil R

更新日期：2013-02-01 00:00:00

abstract：PURPOSE:To test our hypothesis that differences in urinary calcium excretion among blacks and whites may be secondary to ethnic variations in acid (H(+)) metabolism and to prove that increases in titratable acid excretion would be found among individuals predisposed to the development of stress fractures. METHODS:We a...

journal_title：Medicine and science in sports and exercise

authors： Vaitkevicius H,Witt R,Maasdam M,Walters K,Gould M,Mackenzie S,Farrow S,Lockette W

更新日期：2002-02-01 00:00:00

abstract：PURPOSE:The influence of maximal strength, as measured by the maximal load lifted for one repetition (1RM), on power production in the initial 200 ms of the concentric phase for both rebound and nonrebound movements was investigated. We also investigated the effect of external load upon this relationship. METHODS:Twen...

journal_title：Medicine and science in sports and exercise

authors： Cronin JB,McNair PJ,Marshall RN

更新日期：2000-10-01 00:00:00

abstract：UNLABELLED:Physically active classroom lessons have been found to increase on-task behavior in children. Given that physical activity has been associated with an increased time on task (TOT) and that overweight children take fewer steps than normal weight children do, it was expected that benefits of the physical activ...

journal_title：Medicine and science in sports and exercise

authors： Grieco LA,Jowers EM,Bartholomew JB

更新日期：2009-10-01 00:00:00

abstract：PURPOSE:Serial evaluation of aerobic metabolism and exercise tolerance early after heart transplantation (HT). METHODS:Fifteen heart transplant recipients (HTR), aged 52.0 +/- 9.9 yr (mean +/- SD), not undergoing structured rehabilitation programs, were tested two to four times during the first 2 yr post-HT. As a refe...

journal_title：Medicine and science in sports and exercise

authors： Borrelli E,Pogliaghi S,Molinello A,Diciolla F,Maccherini M,Grassi B

更新日期：2003-11-01 00:00:00

abstract：PURPOSE:This study determined the effects of a single session of heavy-resistance exercise on myosin heavy-chain (MHC) mRNA expression, along with the expression of the transcription factors Myo-D, myogenin, and Id-1. METHODS:Four male subjects participated in a control group (CON) and seven in a resistance-exercise g...

journal_title：Medicine and science in sports and exercise

authors： Willoughby DS,Nelson MJ

更新日期：2002-08-01 00:00:00

abstract：PURPOSE:Although several studies have shown that immune cells stimulated by in vitro stress are capable to produce neurotrophins, there is still no evidence whether physiological stress, such as exercise, can modulate the in vivo levels of brain-derived neurotrophic factor (BDNF) in peripheral blood mononuclear cells (...

journal_title：Medicine and science in sports and exercise

authors： Brunelli A,Dimauro I,Sgrò P,Emerenziani GP,Magi F,Baldari C,Guidetti L,Di Luigi L,Parisi P,Caporossi D

更新日期：2012-10-01 00:00:00

abstract：PURPOSE:To determine whether physical performance adaptation is impaired in smokers during early stages of military training and to examine some of the putative mechanistic candidates that could explain any impairment. METHODS:We examined measures of oxidative stress (malondialdehyde [MDA], lipid hydroperoxides), infl...

journal_title：Medicine and science in sports and exercise

authors： Siddall A,Bilzon J,Thompson D,Tauler P,Greeves J,Izard R,Stokes K

更新日期：2020-05-01 00:00:00

abstract：PURPOSE:To study the ventilatory effects of closely monitored cycle ergometer conditioning (HR target, 145-150 beats x min(-1); 25 min/session; three sessions per week) during the second and third pregnancy trimesters (TMs) in healthy human pregnancy. METHODS:Subjects were 27 previously sedentary pregnant women (exerc...

journal_title：Medicine and science in sports and exercise

authors： Ohtake PJ,Wolfe LA

更新日期：1998-01-01 00:00:00

abstract：:This 1 year study examined the effect of high impact and low impact activities on bone mineral density (BMD) at the lumbar vertebrae (L2-L4) in healthy, sedentary, early postmenopausal women. Fifteen subjects whose postmenopausal status was verified by the blood levels of follicle stimulating hormone (FSH) and estradi...

journal_title：Medicine and science in sports and exercise

authors： Grove KA,Londeree BR

更新日期：1992-11-01 00:00:00

abstract：BACKGROUND:Training intensity may play a key role in magnifying the protective effect of physical exercise against nonalcoholic fatty liver disease (NAFLD). PURPOSE:This study aimed to test the hypothesis that vigorous-intensity and interval training is as effective as moderate-intensity and continuous exercise traini...

journal_title：Medicine and science in sports and exercise

authors： Cho J,Kim S,Lee S,Kang H

更新日期：2015-08-01 00:00:00

abstract：PURPOSE:Recovery of ambulatory function after stroke is routinely assessed using standardized subject- or observer-rated instruments that do not directly measure ambulatory activities in the home-community setting. Accuracy of conventional pedometers in stroke patients is not established, limiting their application in ...

journal_title：Medicine and science in sports and exercise

authors： Macko RF,Haeuber E,Shaughnessy M,Coleman KL,Boone DA,Smith GV,Silver KH

更新日期：2002-03-01 00:00:00

abstract：PURPOSE:This study aimed to investigate longitudinal associations of objectively measured physical activity (PA) and sedentary behavior (SB) with body composition and physical fitness at a 12-month follow-up in healthy Swedish 4-yr-old children. METHODS:The data from the population-based MINISTOP trial were collected ...

journal_title：Medicine and science in sports and exercise

authors： Leppänen MH,Henriksson P,Delisle Nyström C,Henriksson H,Ortega FB,Pomeroy J,Ruiz JR,Cadenas-Sanchez C,Löf M

更新日期：2017-10-01 00:00:00

abstract：PURPOSE:Recent literature suggests that subconcussive impacts may influence cognitive functioning across the life span. These effects are suggested to manifest as functional and possibly structural changes. Head impact biomechanics during American football have been characterized from the high school to professional le...

journal_title：Medicine and science in sports and exercise

authors： Martini D,Eckner J,Kutcher J,Broglio SP

更新日期：2013-04-01 00:00:00

abstract：PURPOSE:The range of variability between individuals of the same chronological age (CA) in somatic and biological maturity is large and especially accentuated around the adolescent growth spurt. Maturity assessment is an important consideration when dealing with adolescents, from both a research perspective and youth s...

journal_title：Medicine and science in sports and exercise

authors： Mirwald RL,Baxter-Jones AD,Bailey DA,Beunen GP

更新日期：2002-04-01 00:00:00

abstract：:We used an algebraic model of resting heart rate (HRr), HRr-mn (HRo), to compare resting parasympathetic (n) and sympathetic (m) influence, intrinsic heart rate (HRo), and resting autonomic balance (Abal) in ten endurance-trained (ET) and ten nontrained (NT) men. The values of m, n, and Abal were determined by selecti...

journal_title：Medicine and science in sports and exercise

authors： Smith ML,Hudson DL,Graitzer HM,Raven PB

更新日期：1989-02-01 00:00:00

abstract：PURPOSE:Exercise training restores innate immune system cell function in post-myocardial infarction (post-MI) rats. However, studies of the involvement of lymphocyte (Ly) in the setting of the congestive heart failure (CHF) are few. To address this issue, we investigated the function of Ly obtained from cervical lymph ...

journal_title：Medicine and science in sports and exercise

authors： Batista ML Jr,Santos RV,Lopes RD,Lopes AC,Costa Rosa LF,Seelaender MC

更新日期：2008-03-01 00:00:00

abstract：PURPOSE:This study was conducted to determine if fifth-grade students who walked or bicycled to school on a regular basis were more physically active than those that did not. METHODS:The sample consists of 219 fifth-grade students (10.3 +/- 0.6 yr, 44% male, 58% minority) from eight randomly selected urban and suburba...

journal_title：Medicine and science in sports and exercise

authors： Sirard JR,Riner WF Jr,McIver KL,Pate RR

更新日期：2005-12-01 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：PURPOSE:The purpose of this study was to investigate the relationship between myosin heavy chain (MHC) composition and maximal contraction strength of the human quadriceps femoris muscle. METHODS:Muscle biopsies were obtained from m. vastus lateralis in your highly physical active males (N = 7). The MHC composition of...

journal_title：Medicine and science in sports and exercise

authors： Aagaard P,Andersen JL

更新日期：1998-08-01 00:00:00

abstract：:We examined illness patterns in a cohort of 530 male and female runners who completed a monthly log for 12 months. The average number of upper respiratory tract infections (URTIs) per person per year for the cohort was 1.2. An upper respiratory tract infection was indicated by the report of any of the following sympto...

journal_title：Medicine and science in sports and exercise

authors： Heath GW,Ford ES,Craven TE,Macera CA,Jackson KL,Pate RR

更新日期：1991-02-01 00:00:00

abstract：:The still-evolving Utah paradigm of skeletal physiology supplements former ideas about the control of postnatal bone strength and "mass" in health and disease, on earth and in orbit, and as functions of physical activities including sports. In its view, peak muscle forces on bone dominate control of the biologic mecha...

journal_title：Medicine and science in sports and exercise

authors： Frost HM

更新日期：2000-05-01 00:00:00

abstract：UNLABELLED:Skeletal muscle injury is major concern in sport- and occupation-related fields. PURPOSE:We investigated the effects of increasing stretch-shortening contraction (SSC) repetition number in vivo and the resulting changes in functional performance and quantitative morphometry in rat skeletal muscle. METHODS:...

journal_title：Medicine and science in sports and exercise

authors： Baker BA,Mercer RR,Geronilla KB,Kashon ML,Miller GR,Cutlip RG

更新日期：2007-08-01 00:00:00

abstract：OBJECTIVE:To examine the effect of an increase in roller ski rolling resistance on the physiological and upper body demands of roller skiing with the V2-alternate technique. METHODS:Nine highly skilled cross-country skiers roller skied at three paced speeds on a flat oval loop using roller skis with high (HiR) and low...

journal_title：Medicine and science in sports and exercise

authors： Millet GY,Hoffman MD,Candau RB,Buckwalter JB,Clifford PS

更新日期：1998-05-01 00:00:00

abstract：PURPOSE:In large epidemiologic studies, physical activity (PA) is often assessed using PA questionnaires (PAQ). Because available PAQ may not capture the full range of PA in which urban Chinese adults engage, a PAQ was developed for this purpose. We examined the validity of this PAQ and the 1-yr stability of PA in 545 ...

journal_title：Medicine and science in sports and exercise

authors： Peters TM,Shu XO,Moore SC,Xiang YB,Yang G,Ekelund U,Liu DK,Tan YT,Ji BT,Schatzkin AS,Zheng W,Chow WH,Matthews CE,Leitzmann MF

更新日期：2010-12-01 00:00:00