Technical Alterations during an Incremental Field Test in Elite Male Tennis Players.

abstract：:In "normal" conditions (e.g., normoxia, absence of pathological conditions) convective and diffusive O(2) delivery to skeletal muscle fibers do not seem to represent important determinants for the kinetics of adjustment of oxidative phosphorylation following increases in metabolic demand. Whereas a limiting role by PD...

journal_title：Medicine and science in sports and exercise

authors： Grassi B

更新日期：2005-09-01 00:00:00

abstract：PURPOSE:To compare the physiological and performance adaptations between periodized and nonperiodized resistance training in women collegiate tennis athletes. METHODS:Thirty women (19 +/- 1 yr) were assigned to either a periodized resistance training group (P), nonperiodized training group (NV), or a control group (C)...

journal_title：Medicine and science in sports and exercise

authors： Kraemer WJ,Hakkinen K,Triplett-Mcbride NT,Fry AC,Koziris LP,Ratamess NA,Bauer JE,Volek JS,McConnell T,Newton RU,Gordon SE,Cummings D,Hauth J,Pullo F,Lynch JM,Fleck SJ,Mazzetti SA,Knuttgen HG

更新日期：2003-01-01 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:A nonlinear dynamic systems model has previously been proposed to explain pacing strategies employed during exercise. PURPOSE:This study was conducted to examine the pacing strategies used under varying conditions during the cycle phase of an Ironman triathlon. METHODS:The bicycles of six well-trained ma...

journal_title：Medicine and science in sports and exercise

authors： Abbiss CR,Quod MJ,Martin DT,Netto KJ,Nosaka K,Lee H,Surriano R,Bishop D,Laursen PB

更新日期：2006-04-01 00:00:00

abstract：INTRODUCTION/PURPOSE:To assess in men whether exercise affects the estimated age-related increase in adiposity, and contrariwise, whether age affects the estimated exercise-related decrease in adiposity. METHODS:Cross-sectional analyses of 64,911 male runners who provided data on their body mass index (97.6%) and wais...

journal_title：Medicine and science in sports and exercise

authors： Williams PT,Pate RR

更新日期：2005-08-01 00:00:00

abstract：OBJECTIVES:To examine if the associations between motor competence and physical activity and musculoskeletal fitness change over time, whether motor competence is associated with longitudinal trajectories of physical activity and fitness, and mediating pathways among these constructs across early childhood. METHODS:Fo...

journal_title：Medicine and science in sports and exercise

authors： King-Dowling S,Proudfoot NA,Cairney J,Timmons BW

更新日期：2020-11-01 00:00:00

abstract：:The performance of the Caltrac accelerometer was studied in elementary school-age children under field and laboratory conditions. In Study 1, 35 children (20 boys, 15 girls, mean age = 10.8 yr) wore the accelerometer and a heart rate (HR) monitor for 2 d. Caltrac activity counts per hour were compared to the mean "act...

journal_title：Medicine and science in sports and exercise

authors： Sallis JF,Buono MJ,Roby JJ,Carlson D,Nelson JA

更新日期：1990-10-01 00:00:00

abstract：OBJECTIVE:To determine the optimal crank length and crank-axle height for maximum power production during standing arm cranking ("grinding"). METHODS:Nine elite professional America's Cup grinders (age = 36 +/- 2 yr, body mass = 104 +/- 1 kg, body fat = 13% +/- 2%) performed eight maximal 6-s sprints on an adjustable ...

journal_title：Medicine and science in sports and exercise

authors： Neville V,Pain MT,Kantor J,Folland JP

更新日期：2010-02-01 00:00:00

abstract：:The present investigation was conducted to determine whether critical power (CP) assesses the ability to perform continuous aerobic exercise and to determine whether training-induced changes in aerobic endurance are reflected by changes in the slope, but not the y-intercept of the CP function. Twelve healthy, active, ...

journal_title：Medicine and science in sports and exercise

authors： Jenkins DG,Quigley BM

更新日期：1992-11-01 00:00:00

abstract：:Forty male and 40 female rats were randomly assigned to 1 of 4 experimental groups. Half of the animals of each gender were exercised by jumping (weighted by a vest with up to 70% body weight) to a height of 16 cm 20 times X d-1 (30 s between jumps) 5 d X wk-1 for 8 wk. Half of the exercised animals and half of the se...

journal_title：Medicine and science in sports and exercise

authors： Leeds EM,Wilkerson JE,Brown GD,Kamen G,Bredle D

更新日期：1986-12-01 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

abstract：UNLABELLED:Hiking is a recreational activity shown to offer significant positive effects on the human body. However, walking downhill and external load carriage have both been shown to increase the risk of musculoskeletal pain and injury. The use of hiking poles has been demonstrated to be successful in reducing forces...

journal_title：Medicine and science in sports and exercise

authors： Bohne M,Abendroth-Smith J

更新日期：2007-01-01 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：:Our understanding of the responses of men and women to cold stress is extremely limited. Various scientists have suggested that there could be gender differences in thermoregulatory responses due to sexual dimorphism in body fatness and its distribution, in body surface area, and in mass. In addition, there are also s...

journal_title：Medicine and science in sports and exercise

authors： Graham TE

更新日期：1988-10-01 00:00:00

abstract：:The case of a table tennis player suffering from intra-articular loose bodies of the elbow is reported. The patient developed the first signs of osteochondritis dissecans of the right lateral humeral condyle at age 16 but underwent surgery only 6 yr later. He has now resumed training and competition, despite some resi...

journal_title：Medicine and science in sports and exercise

authors： Pintore E,Maffulli N

更新日期：1991-08-01 00:00:00

abstract：PURPOSE:Evasive sidestepping during sports commonly results in noncontact anterior cruciate ligament injuries. Sidestepping in response to different simple visual stimuli has been studied previously but never investigated using quasi-game-realistic visual conditions. We compared the biomechanics of high-level and low-l...

journal_title：Medicine and science in sports and exercise

authors： Lee MJ,Lloyd DG,Lay BS,Bourke PD,Alderson JA

更新日期：2013-09-01 00:00:00

abstract：PURPOSE:For ultra-endurance athletes, whose energy expenditure is likely to be at the extremes of human tolerance for sustained periods of time, there is increased concern regarding meeting energy needs. Due to the lack of data outlining the energy requirements of such athletes, it is possible that those participating ...

journal_title：Medicine and science in sports and exercise

authors： Hill RJ,Davies PS

更新日期：2001-01-01 00:00:00

abstract：PURPOSE:The purpose of this paper was to determine whether differences in hemoglobin (Hb) and muscle aerobic capacity exist between African-American (AA) and Caucasian (CA) premenopausal women and to determine whether Hb and aerobic capacity of the muscle are associated with the racial differences in maximum oxygen upt...

journal_title：Medicine and science in sports and exercise

authors： Hunter GR,Weinsier RL,McCarthy JP,Enette Larson-Meyer D,Newcomer BR

更新日期：2001-10-01 00:00:00

abstract：:We develop an observation system that quantifies the duration, intensity, and frequency of children's physical activities. We use this system to assess the level and tempo of energy expenditure under free-ranging, natural conditions experienced by 15 children aged 6-10 yr in southern California. Observations were reco...

journal_title：Medicine and science in sports and exercise

authors： Bailey RC,Olson J,Pepper SL,Porszasz J,Barstow TJ,Cooper DM

更新日期：1995-07-01 00:00:00

abstract：PURPOSE:The purpose of this study was to evaluate physical performance (static and dynamic) of U.S. Air Force reservists after an eastbound air travel across seven time zones and to estimate the pharmacological aids slow-release caffeine and melatonin versus placebo in attempt to overcome the decline in performance. M...

journal_title：Medicine and science in sports and exercise

authors： Lagarde D,Chappuis B,Billaud PF,Ramont L,Chauffard F,French J

更新日期：2001-04-01 00:00:00

abstract：PURPOSE:For most people, the benefits of physical activity far outweigh the risks. Research has suggested that exercise preparticipation questionnaires might refer an unwarranted number of adults for medical evaluation before exercise initiation, creating a potential barrier to adoption. The new American College of Spo...

journal_title：Medicine and science in sports and exercise

authors： Whitfield GP,Riebe D,Magal M,Liguori G

更新日期：2017-10-01 00:00:00

abstract：PURPOSE:The present study investigated the effects of severe-intensity interval training at a frequency of once a week on cardiorespiratory function at rest and during exercise. METHODS:Fourteen young healthy males were randomly assigned to either an interval training group or control group. Cardiorespiratory function...

journal_title：Medicine and science in sports and exercise

authors： Nakahara H,Ueda SY,Miyamoto T

更新日期：2015-04-01 00:00:00

abstract：:Pyruvate and dihydroxyacetone are three carbon compounds that when infused directly into the blood or taken orally produce strong metabolic effects. When chronically fed to animals as part of their diet, pyruvate plus dihydroxyacetone reduce the rate of weight gain and body fat content during growth. These alterations...

journal_title：Medicine and science in sports and exercise

authors： Ivy JL

更新日期：1998-06-01 00:00:00

abstract：PURPOSE:To compare the total exercise loads (intensity x volume) of the Vuelta a España and Tour de France during the last year. METHODS:Seven professional road cyclists (28 +/- 1 yr; [OV0312]O(2max): 74.6 +/- 2.2 mL.kg-1.min-1) who participated in both Tour and Vuelta during the years 1997, 1999, 2000, or 2001 were c...

journal_title：Medicine and science in sports and exercise

authors： Lucia A,Hoyos J,Santalla A,Earnest C,Chicharro JL

更新日期：2003-05-01 00:00:00

abstract：PURPOSE:Cardiopulmonary exercise testing (CPX) provides valuable clinical information, including peak ventilation (V˙Epeak), which has been shown to have diagnostic and prognostic value in the assessment of patients with underlying pulmonary disease. This report provides reference standards for V˙Epeak derived from CPX...

journal_title：Medicine and science in sports and exercise

authors： Kaminsky LA,Harber MP,Imboden MT,Arena R,Myers J

更新日期：2018-12-01 00:00:00

abstract：:The influence of somatotype on the validity of anthropometric prediction of body density (Db) in young women (N = 92) was investigated. Three groups of predominantly endomorph (N = 27), mesomorph (N = 35), and ectomorph (N = 30) women were identified by the Heath-Carter and Sheldon somatotyping methods. Discriminant a...

journal_title：Medicine and science in sports and exercise

authors： Bulbulian R

更新日期：1984-08-01 00:00:00

abstract：:Body composition has become a major field of interest for many exercise and sport scientists as well as clinicians who specialize in the prevention of and rehabilitation from hypokinetic diseases. This paper discusses the state of the art within selected areas of body composition, identifying significant areas of cont...

journal_title：Medicine and science in sports and exercise

authors： Wilmore JH

更新日期：1983-01-01 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：UNLABELLED:Clinical treatment in physical rehabilitation routinely uses perceived relative forces. PURPOSE:This study used psychophysical methods to quantify subjects' errors during submaximal muscular force production. METHODS:A sample of young adult (aged 23 +/- 3 yr) females (N = 60, 62 +/- 14 kg) and males (N = 5...

journal_title：Medicine and science in sports and exercise

authors： Jackson AW,Dishman RK

更新日期：2000-02-01 00:00:00

abstract：INTRODUCTION/PURPOSE:The goal of this program was to determine the feasibility of a novel noninvasive, highly miniaturized optomechanical earbud sensor for accurately estimating total energy expenditure (TEE) and maximum oxygen consumption (VO2max). The optomechanical sensor module, small enough to fit inside commercia...

journal_title：Medicine and science in sports and exercise

authors： Leboeuf SF,Aumer ME,Kraus WE,Johnson JL,Duscha B

更新日期：2014-01-01 00:00:00