Aerobic response to endurance training in prepubescent children: a critical analysis.

abstract：PURPOSE:In order to investigate overtraining-related adaptations in the autonomic nervous system, cardiac autonomic activity was examined in a junior cross-country skier who presented with reduced performance in competitions, early breathlessness during training sessions, and accumulated central fatigue. METHODS:Power...

journal_title：Medicine and science in sports and exercise

authors： Hedelin R,Wiklund U,Bjerle P,Henriksson-Larsén K

更新日期：2000-09-01 00:00:00

abstract：PURPOSE:To determine the prevalence of reversible airway obstruction in a group of professional football training camp participants. METHODS:All attendees at a Canadian Football League team rookie preseason training camp were invited to participate in a protocol designed to elicit symptoms and signs of reversible airw...

journal_title：Medicine and science in sports and exercise

authors： Ross RG

更新日期：2000-12-01 00:00:00

abstract：PURPOSE:There is interest in the potential long-term use of dietary supplementation with bovine colostrum to enhance exercise performance. The purpose of the present study was to determine the dose effects of bovine colostrum on cycling performance. METHODS:Forty-two competitive cyclists were randomly divided into thr...

journal_title：Medicine and science in sports and exercise

authors： Coombes JS,Conacher M,Austen SK,Marshall PA

更新日期：2002-07-01 00:00:00

abstract：BACKGROUND:Tendinopathies are painful overuse injuries observed in athletes participating in jumping sports. These injuries are heavily dependent on the resulting strain from the applied mechanical load. Therefore, mechanisms to reduce tendon strain may represent a primary prevention strategy to reduce the incidence of...

journal_title：Medicine and science in sports and exercise

authors： Firminger CR,Bruce OL,Wannop JW,Stefanyshyn DJ,Edwards WB

更新日期：2019-09-01 00:00:00

abstract：PURPOSE:Sleep is considered essential for muscle recovery, mainly due to its effect on hormone secretion. Total sleep deprivation or restriction is known to alter not only blood hormones but also cytokines that might be related to skeletal muscle recovery. This study aimed to evaluate whether total sleep deprivation af...

journal_title：Medicine and science in sports and exercise

authors： Dáttilo M,Antunes HKM,Galbes NMN,Mônico-Neto M,DE Sá Souza H,Dos Santos Quaresma MVL,Lee KS,Ugrinowitsch C,Tufik S,DE Mello MT

更新日期：2020-02-01 00:00:00

abstract：PURPOSE:This study aimed to examine whether long-term fish oil (FO) supplementation is associated with a lower risk of mobility disability and enhances benefits of physical activity (PA). METHODS:A total of 1635 sedentary adults age 70 to 89 yr from the Lifestyle Interventions and Independence for Elders single-blinde...

journal_title：Medicine and science in sports and exercise

authors： Balachandran A,Gundermann DM,Walkup MP,King AC,Ambrosius WT,Kritchevsky SB,Pahor M,Newman AB,Manini TM

更新日期：2020-04-01 00:00:00

abstract：PURPOSE:The objective of this study is to determine the effects of a caffeine-containing energy drink on female volleyball players' performance. METHODS:Thirteen elite female volleyball players ingested 3 mg·kg of caffeine with an energy drink or the same drink without caffeine (placebo drink) in a double-blind and ra...

journal_title：Medicine and science in sports and exercise

authors： Pérez-López A,Salinero JJ,Abian-Vicen J,Valadés D,Lara B,Hernandez C,Areces F,González C,Del Coso J

更新日期：2015-04-01 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：:Recent research has demonstrated that intracellular signaling components associated with several proinflammatory cytokines have the potential to interact with signaling pathways that regulate anabolic processes in skeletal muscle. This presentation and the ensuing brief review are intended to present a selection of th...

journal_title：Medicine and science in sports and exercise

authors： Adams GR

更新日期：2010-01-01 00:00:00

abstract：:The effects of weight loss (dehydration) techniques (which mimicked techniques used prior to actual competition) used by intercollegiate wrestlers on selected physiological parameters (strength, anaerobic power, anaerobic capacity, the lactate threshold (LT), and peak aerobic power) were examined in seven intercollegi...

journal_title：Medicine and science in sports and exercise

authors： Webster S,Rutt R,Weltman A

更新日期：1990-04-01 00:00:00

abstract：:We suggest a mechanism by which blood volume changes might explain the hypotension that, after space flight, often accompanies the return to normal gravity. Upon entering microgravity, peripheral veins may collapse and, because of volume redistribution, raise the pressure in the central venous compartment. After some ...

journal_title：Medicine and science in sports and exercise

authors： Tyberg JV,Hamilton DR

更新日期：1996-10-01 00:00:00

abstract：INTRODUCTION:We examined the relationships between insulin-like growth factor I (IGF-I), its binding protein (IGFBP-3), body composition, and bone mineral density (BMD) in collegiate runners (N = 13), gymnasts (N = 10), and noncompetitive women (N = 10). METHODS:Subjects were evaluated by dual-energy x-ray absorptiome...

journal_title：Medicine and science in sports and exercise

authors： Snow CM,Rosen CJ,Robinson TL

更新日期：2000-11-01 00:00:00

abstract：:Over the course of 2 yr, we prospectively studied the effect on resting metabolic rate (RMR) of multiple cycles of weight loss followed by regain in six weight cycling collegiate wrestlers (WC) (mean age = 19.0 yr) compared with 12 weight stable, physically active, nonwrestling controls (C) (mean age = 20.9 yr), whose...

journal_title：Medicine and science in sports and exercise

authors： Schmidt WD,Corrigan D,Melby CL

更新日期：1993-05-01 00:00:00

abstract：INTRODUCTION/PURPOSE:Cycling is associated with a reproducible systolic anterograde and diastolic retrograde flow pattern in the brachial artery (BA) of the inactive upper limb, which results in endothelial nitric oxide (NO) release. The purpose of this study was to examine the impact of different types and intensities...

journal_title：Medicine and science in sports and exercise

authors： Thijssen DH,Dawson EA,Black MA,Hopman MT,Cable NT,Green DJ

更新日期：2009-05-01 00:00:00

abstract：PURPOSE:Studies have shown that absolute intensity of physical activity is associated with reduced risk of preeclampsia. This analysis was performed to examine whether relative intensity may also be related to preeclampsia risk. METHODS:Using data from a case-control study conducted from 1998 to 2002, the authors asse...

journal_title：Medicine and science in sports and exercise

authors： Rudra CB,Williams MA,Lee IM,Miller RS,Sorensen TK

更新日期：2005-11-01 00:00:00

abstract：PURPOSE:To continuously measure core temperature (T(c)) and heart rate(HR), and quantify fluid balance during a 21-km mass-participation road racein warm, humid environmental conditions. METHODS:Eighteen heat-acclimatized male soldiers ingested a telemetric Tc sensor on the evening prior to the race and wore an ambula...

journal_title：Medicine and science in sports and exercise

authors： Byrne C,Lee JK,Chew SA,Lim CL,Tan EY

更新日期：2006-05-01 00:00:00

abstract：:A decrease in hepatic lactate dehydrogenase (LDH) activity following endurance training has been a consistent observation. In the present study, we sought to determine whether the training-induced decrease in hepatic LDH activity (pyruvate = substrate) was associated with a shift in the isoenzyme profile and/or altera...

journal_title：Medicine and science in sports and exercise

authors： Sumida KD,Frisch F,Donovan CM

更新日期：1995-04-01 00:00:00

abstract：PURPOSE:Circulating angiogenic cells (CAC) comprise multiple subpopulations of exercise-inducible peripheral blood mononuclear cells (PBMC) that promote angiogenesis and maintain endothelial integrity. We examined the effect of acute maximal exercise on CD31, CD62E, CD14/CD31, CD34/VEGFR2, CD3/CD31, and CD3 PBMC in you...

journal_title：Medicine and science in sports and exercise

authors： Shill DD,Marshburn MP,Hempel HK,Lansford KA,Jenkins NT

更新日期：2016-12-01 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：PURPOSE:Previous research identified decreased overall and cardiovascular mortality for National Football League (NFL) players from the 1959-1988 era. The present study explored the mortality risk among recent NFL players who played in an era of heavier linemen and nearly year-round physical conditioning. METHODS:This...

journal_title：Medicine and science in sports and exercise

authors： Lincoln AE,Vogel RA,Allen TW,Dunn RE,Alexander K,Kaufman ND,Tucker AM

更新日期：2018-03-01 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：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：:Six adult females with normal menstrual cycles (28-31 d in length) volunteered to exercise on a bicycle ergometer on five different days of their menstrual cycles (days 2, 8, 14, 20, and 26; day 1 = onset of menstruation). Each day the subjects exercised at a maximum work load (184.4 W) and at four submaximal exercise...

journal_title：Medicine and science in sports and exercise

authors： Stephenson LA,Kolka MA,Wilkerson JE

更新日期：1982-01-01 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：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：PURPOSE:Obesity is epidemic in Western societies, with rapid rates of increase in the young. Various methods exist for the assessment of body composition, but these have not been compared in obese children and adolescents. This study compared methods of body composition assessment in obese young people to determine whe...

journal_title：Medicine and science in sports and exercise

authors： Watts K,Naylor LH,Davis EA,Jones TW,Beeson B,Bettenay F,Siafarikas A,Bell L,Ackland T,Green DJ

更新日期：2006-03-01 00:00:00

abstract：:Ingestion of fluids providing carbohydrate and electrolytes extends endurance times during prolonged exercise. To understand the contribution of these factors, we examined hormonal, physiologic, and metabolic responses to ingesting water (W) or a 7% glucose polymer/fructose/electrolyte solution (GPFE) in 10 men (age: ...

journal_title：Medicine and science in sports and exercise

authors： Deuster PA,Singh A,Hofmann A,Moses FM,Chrousos GC

更新日期：1992-01-01 00:00:00

abstract：PURPOSE:The objective of this study was to quantify age-related changes in accelerometer-derived day-level physical activity and sedentary behavior pattern metrics (i.e., number, length, and temporal dispersion of bouts and breaks) across 3 yr of middle childhood. Differences by child sex and weekend versus weekday wer...

journal_title：Medicine and science in sports and exercise

authors： Dunton GF,Yang CH,Zink J,Dzubur E,Belcher BR

更新日期：2020-06-01 00:00:00

abstract：:To determine the effect of large and sudden increases in training volume on performance characteristics and the feasibility of using overtraining syndrome symptoms to monitor performance changes, 15 elite judo athletes were examined through 10 wk of training. Athletes performed their regular regimens of resistance (3 ...

journal_title：Medicine and science in sports and exercise

authors： Callister R,Callister RJ,Fleck SJ,Dudley GA

更新日期：1990-12-01 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