Abstract:
:The gravity-dependency and age-dependency of noradrenergic vasoconstrictor outflow to skeletal muscle (muscle sympathetic nerve activity; MSNA) in humans was analyzed by applying microneurography technique. The basal level of MSNA in the horizontally supine position increased with aging without significant changes in arterial baroreflex sensitivity. MSNA responded to +Gz load by head-up tilt and to simulated microgravity by thermoneutral head-out immersion with increasing and decreasing the activity, respectively. These gravity related responses of MSNA were age-dependent, being reduced by aging. Simultaneously monitored hemodynamic responses to +Gz load and to simulated microgravity were also age-dependent, being reduced by aging. The gravity-dependent and also age-dependent changes in the noradrenergic vasoconstrictor outflow to muscle seem to be related to the mechanisms controlling the gravity-dependent fluid shift in the human body.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Mano Tdoi
10.1097/00005768-199610000-00039subject
Has Abstractpub_date
1996-10-01 00:00:00pages
S85-9issue
10 Suppleissn
0195-9131issn
1530-0315journal_volume
28pub_type
杂志文章abstract:PURPOSE:The purpose of this study was to identify electromyographic (EMG) differences in the latent muscle reaction timing (LMRT) of the rotator cuff between trained overhead throwers and control subjects in response to sudden internal rotation perturbation (P < or = 0.05). METHODS:Subjects included 15 trained overhea...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199910000-00006
更新日期:1999-10-01 00:00:00
abstract:PURPOSE:Time-resolved near-infrared spectroscopy was used to quantify tissue oxy- and deoxyhemoglobin concentrations ([HbO2] and [HbR]) and O2 saturation (stO2) in the oblique fibers of the vastus medialis muscle and brain prefrontal cortex during knee extension with and without blood flow restriction (BFR). METHODS:S...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000000393
更新日期:2015-01-01 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
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1992-11-01 00:00:00
abstract::The cell-to-cell lactate shuttle was introduced in 1984 and has been repeatedly supported by studies using a variety of experimental approaches. Because of its large mass and metabolic capacity, skeletal muscle is probably the major component of the lactate shuttle in terms of both production and consumption. Muscles ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1249/MSS.0b013e31815fa580
更新日期:2008-03-01 00:00:00
abstract:INTRODUCTION:The purpose of this study was to identify unique organized sport trajectories from early childhood to late adolescence in an Australian pregnancy cohort, the Raine Study. METHODS:Participation in organized sport was assessed at ages 5, 8, 10, 14, and 17 yr. Physical activity, body composition, and self-ra...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000000894
更新日期:2016-07-01 00:00:00
abstract:PURPOSE:High-throughput profiling of metabolic status (metabolomics) allows for the assessment of small-molecule metabolites that may participate in exercise-induced biochemical pathways and corresponding cardiometabolic risk modification. We sought to describe the changes in a diverse set of plasma metabolite profiles...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,随机对照试验
doi:10.1249/MSS.0000000000001594
更新日期:2018-07-01 00:00:00
abstract::Twelve male swimmers were studied psychologically before, during, and after 10 d of increased training. Daily training distance was increased from 4,000 to 9,000 m.d-1, and intensity was maintained at 94% of VO2max. Three of the swimmers were unable to tolerate the increased training load, and they did the same distan...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/00005768-198808000-00014
更新日期:1988-08-01 00:00:00
abstract:PURPOSE:This study was designed to compare the differences in EMG and kinematics between successful and unsuccessful attempts in bench pressing at one repetition maximum (1RM) in recreational weight-trained subjects. We hypothesized that failure occurs during the sticking period (the period during which there is a temp...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181a8c360
更新日期:2009-11-01 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
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001466
更新日期:2018-03-01 00:00:00
abstract::Since the first reported use of knee braces for prophylactic purposes in 1979, these braces have gone through a period of widespread popularity and use, followed by increasing skepticism as to their effectiveness. Early use was unsupported by significant clinical or laboratory data. Multiple studies regarding prophyla...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:
更新日期:1991-07-01 00:00:00
abstract:PURPOSE:Previous studies have suggested that higher levels of physical activity may lower lung cancer risk; however, few prospective studies have evaluated lung cancer mortality in relation to cardiorespiratory fitness (CRF), an objective marker of recent physical activity habits. METHODS:Thirty-eight thousand men, ag...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181c47b65
更新日期:2010-05-01 00:00:00
abstract:UNLABELLED:High-speed auto racing has been demonstrated to produce accelerated heart rate (HR) during competition. However, it has not been determined whether the increase in HR was due to physical work efforts or a result of emotional stress. PURPOSE:The purpose of this investigation was to examine the physiological ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-200212000-00033
更新日期:2002-12-01 00:00:00
abstract:PURPOSE:The purpose of this study was to compare the predictive accuracy of previously published skinfold (SKF) equations for estimating body density of 134 premenopausal African-American women (18 to 40 yr). METHODS:The equations cross-validated were: the sum of seven skinfolds equation (JPW7) and the sum of three sk...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199811000-00015
更新日期:1998-11-01 00:00:00
abstract::Healthy men (N = 33) and women (N = 73) participated in a 6-month exercise program three mornings per week, and their attendance scores (percent of total classes attended) were related to a variety of physiological, anthropometric, psychological, and demographic variables which were studied. These subjects were also g...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1984-12-01 00:00:00
abstract:PURPOSE:Compare three published methods of quantifying physical activity (total activity, peak strain, and bone-loading exposure (BLE) scores) and identify their associations with areal bone mineral density (aBMD), volumetric BMD (vBMD), and bone strength. METHODS:Postmenopausal women (N = 239; mean age: 53.8 yr) from...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,多中心研究
doi:10.1249/mss.0b013e318155a7fe
更新日期:2007-12-01 00:00:00
abstract:PURPOSE:To evaluate the effects of intensity of exercise on insulin resistance and the expression of inflammatory proteins in the skeletal muscle of diet-induced obese (DIO) rats after a single bout of exercise. METHODS:In the first exercise protocol, the rats swam for two 3-h bouts, separated by a 45-min rest period ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181e45d08
更新日期:2010-12-01 00:00:00
abstract:INTRODUCTION:Ankle proprioception training has been found to improve balance-related gait disorders; however, the relationship between ankle proprioception and specific gait patterns in older adults with and without impaired balance has not been systematically examined. METHODS:This study characterizes gait patterns o...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001017
更新日期:2016-11-01 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
pub_type: 杂志文章
doi:10.1097/00005768-199602000-00013
更新日期:1996-02-01 00:00:00
abstract:PURPOSE:The reliability of athletes to recall and self-report a concussion history has never been quantified. This study examined the reliability of the self-report concussion history measure and explored determinants of recall in the number of self-reported concussions in a group of retired professional football playe...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31823240f2
更新日期:2012-03-01 00:00:00
abstract::Energy expenditure during bicycling on flat terrain depends predominantly on air resistance, which is a function of total frontal area (bicycle and rider), coefficient of drag, and air speed. Body position on the bicycle may affect energy expenditure by altering either frontal area or coefficient of drag. In this stud...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
abstract:PURPOSE:The objective of this study is to determine whether individuals with type 1 diabetes exhibit impairments in local and whole-body heat loss responses that could affect core temperature regulation during exercise in the heat compared with matched, nondiabetic individuals. METHODS:Twelve otherwise healthy individ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31829002f3
更新日期:2013-09-01 00:00:00
abstract::Nine subjects participated in an exercise program for 40 min/day, 6 days/wk. The training work rates were kept constant for the first 4 wk. The work rates were then increased to a higher level and kept constant for an additional 5 wk. During both training periods, maximum oxygen uptake (VO2max) increased for the first...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1981-01-01 00:00:00
abstract:PURPOSE:Power training plays an essential part in many sport disciplines. The importance of eccentric power training remains a matter of controversial discussion. The objective of this study was therefore to investigate the difference in metabolic reaction between eccentric and concentric stress in comparable work. ME...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-200105000-00018
更新日期:2001-05-01 00:00:00
abstract:INTRODUCTION:The prognostic value of peak V˙O2 and V˙E/V˙CO2 slope measured during cardiopulmonary exercise (CPX) testing has been well established in patients with advanced heart failure, but blood pressure response to exercise is less well characterized. METHODS:We retrospectively studied 151 outpatients who underwe...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001587
更新日期:2018-07-01 00:00:00
abstract:INTRODUCTION/PURPOSE:Aging with a sedentary lifestyle is associated with increased risk for developing cardiovascular disease (CVD), osteoporosis, and sarcopenia. The purpose of this study was to determine whether former professional football athleticism would be associated with reduced risk factors for CVD and osteopo...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/01.mss.0b013e3180557466
更新日期:2007-07-01 00:00:00
abstract::Anthropometric and demographic characteristics are important determinants of exercise performance in healthy subjects, but their influence has not yet been studied in severe chronic heart failure, although peak oxygen uptake is frequently assessed in such patients for prognostic purposes. The aim of the present analys...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199706000-00002
更新日期:1997-06-01 00:00:00
abstract::Running technique and economy (VO2submax) were examined before and after a 6-wk period of running training. Fifteen males were filmed and performed 10-min economy runs at 3.36 m.s-1 on a treadmill. An incremental treadmill test was used to record running performance and maximal oxygen consumption (VO2max). Subjects we...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005768-199607000-00013
更新日期:1996-07-01 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
pub_type: 杂志文章
doi:10.1249/01.mss.0000170096.96662.05
更新日期:2005-07-01 00:00:00
abstract:PURPOSE:The objective of this study is to determine the effect of body mass index (BMI) on level of agreement between six previously established prediction equations for three commonly used accelerometers to predict summary measures of energy expenditure (EE) in youth. METHODS:One hundred and thirty-one youth between ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e318267b8f1
更新日期:2012-12-01 00:00:00
abstract:INTRODUCTION:Gastroesophageal reflux disease is a disorder in which gastric contents move from stomach to esophagus. Exercise is a recognized contributing factor to reflux in healthy volunteers and is reported to be proportional to exercise intensity and the type of exercise. Our aim was to explore changes in physiolog...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/01.MSS.0000064937.99001.56
更新日期:2003-05-01 00:00:00