Abstract:
:To investigate the effect of temperature stress on responses to static-dynamic work in patients with ischemic heart disease (IHD), 10 men with IHD shoveled gravel for 30 min in a warm (29 degrees C), neutral (24 degrees C), and cold (-8 degrees C) environment (on separate days). A pace of 15 lifts.min-1 was set, and the load per lift approximated 5.5 kg. Heart rate (HR), oxygen consumption (VO2), and systolic (SBP) and diastolic blood pressures (DBP) were evaluated at 5-min intervals. Arrhythmias and ST-segment depression were evaluated by ambulatory electrocardiographic monitoring. At 30 min, VO2, SBP, and DBP were higher (P < 0.05) in the cold environment, and HR was higher (P < 0.05) in the warm environment compared with the neutral environment. HR increased (P < 0.05) from 5 to 30 min in all three conditions. The increase in HR was greater (P < 0.05) in the warm environment. None of the subjects reported angina or demonstrated electrocardiographic ST-segment changes during shoveling in any environment. The results indicate that low-risk patients with stable IHD show modest temperature-induced alterations in hemodynamic and VO2 responses during 30 min of moderate intensity (50-60% of peak VO2) static-dynamic work without adverse electrocardiographic responses or symptomatology.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Dougherty SM,Sheldahl LM,Wilke NA,Levandoski SG,Hoffman MD,Tristani FEdoi
10.1249/00005768-199307000-00006subject
Has Abstractpub_date
1993-07-01 00:00:00pages
790-5issue
7eissn
0195-9131issn
1530-0315journal_volume
25pub_type
杂志文章abstract:PURPOSE:Traction-induced injury, related to muscles of the superficial and deep posterior compartments, has been implicated as the cause of medial tibial stress syndrome (MTSS) with symptoms commonly occurring in the distal third of the posteromedial tibia. Standard anatomic texts do not identify this region as an atta...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181a6519c
更新日期:2009-11-01 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
pub_type: 杂志文章
doi:10.1249/00005768-199010000-00023
更新日期:1990-10-01 00:00:00
abstract::Estimates of muscular efficiency in competitive and recreational cyclists at similar work intensities and cycling frequencies were examined. Twelve healthy college-age male nonsmoker volunteers were grouped as either competitive (CC; N = 6) or recreational (RC; N = 6) cyclists based upon previous cycling experience. S...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章
doi:10.1097/00005768-199611000-00008
更新日期:1996-11-01 00:00:00
abstract:PURPOSE:Similar to musician's focal dystonia, a task-specific phenomenon known as yips, has also been reported in professional athletes. Yips is usually described as focal dystonia, or choking under pressure, or as lying on a continuum between both. Based on the common occupational conditions across musicians and athle...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001696
更新日期:2018-11-01 00:00:00
abstract::Muscle fatigue has been studied with a variety approaches, tools and technologies. The foci of these studies have ranged tremendously, from molecules to the entire organism. Single cell and animal models have been used to gain mechanistic insight into the fatigue process. The theme of this review is the concept that t...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1249/MSS.0000000000001052
更新日期:2016-11-01 00:00:00
abstract:PURPOSE:This study aimed to determine the effect of cooling progressively greater portions of the lower extremities on dynamic balance and neuromuscular activation. METHODS:Ten healthy males (22.8 ± 3.4 yr, 76.5 ± 9.1 kg) performed one room air temperature control (22.4°C ± 0.8°C) and three trials of cold water immers...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000000379
更新日期:2015-01-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/01.MSS.0000064999.82036.B4
更新日期:2003-05-01 00:00:00
abstract:PURPOSE:The purpose of this study was to determine whether fasting plasma leptin concentration was altered with an increase in training volume in competitive male and female athletes. METHODS:Intercollegiate male (N = 9) and female (N = 12) swimmers were examined during the preseason and at two times during the mid-se...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-200102000-00009
更新日期:2001-02-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181f315ad
更新日期:2011-03-01 00:00:00
abstract::The purposes of this study were to evaluate (a) the effects of step rate and upper body support on the VO2 and HR responses to fixed work rates on the StairMaster 4000 (SM), (b) the accuracy of the SM settings, and (c) how HR compared with that measured during grade-walking on a treadmill. Six subjects worked at a slo...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1992-09-01 00:00:00
abstract::Ten subjects were studied to determine within-subject variance (Swi2), and its components, biovariability (Si2) and technological error (Se2) of residual lung volume (RLV). Each subject's RLV was determined 18 times using the oxygen dilution method (O2D) over a 5-day period. Se2 was measured using a 9.0 l spirometer a...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1986-08-01 00:00:00
abstract:PURPOSE:This study evaluated the factorial validity of a self-report measure of concussion-related symptom severity among a large sample of male, high-school athletes. METHODS:Participants (N = 1089) were nonconcussed, male, high-school football players. All participants completed a single baseline self-report measure...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/01.mss.0000183186.98212.d5
更新日期:2006-01-01 00:00:00
abstract:PURPOSE:Physically active women have a reduced risk of breast cancer, but the dose of activity necessary and the role of energy balance and other potential mechanisms have not been fully explored in animal models. We examined treadmill and wheel running effects on mammary tumorigenesis and biomarkers in p53-deficient (...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31819f1f05
更新日期:2009-08-01 00:00:00
abstract::Vertical loading rates are typically found to be lower in forefoot compared to rearfoot strikers, promoting the idea that forefoot striking is desirable and may reduce running injury risk. However, prior work using linear models has shown that foot inclination angle (FIA) at initial contact is a poor predictor of vert...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000002023
更新日期:2019-10-01 00:00:00
abstract:PURPOSE:High-intensity interval training (HIIT) represents a potent stimulus to the dynamic oxygen uptake (V˙O2) response in adults, but whether the same is evident in youth is unknown. HIIT has also been suggested to place a lower demand on the respiratory system, decreasing the likelihood of exacerbation in those wit...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000002270
更新日期:2020-06-01 00:00:00
abstract:UNLABELLED:Nampt/pre-B-cell colony-enhancing factor/visfatin (visfatin) release from adipocytes has recently been suggested to be nutrient responsive and linked to systemic nicotinamide adenine dinucleotide biosynthesis and regulation of pancreatic beta-cell function. PURPOSE:We hypothesized that if visfatin does play...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e318195bad5
更新日期:2009-06-01 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
pub_type: 杂志文章
doi:10.1249/01.mss.0000175862.41620.41
更新日期:2005-11-01 00:00:00
abstract:PURPOSE:Exercise appears to offer protection against weight gain, perhaps related to its effects on fat metabolism. Previous work in rats has shown that interventions resulting in a negative energy balance lead to alterations in the trafficking of dietary fat. This study was undertaken to determine whether exercise aft...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章
doi:10.1097/00005768-200211000-00011
更新日期:2002-11-01 00:00:00
abstract::Physiological variables must often be scaled for body size differences to permit meaningful comparisons between subjects or groups. This study aimed to determine the proper relationship between body dimensions and left ventricular mass (LVM) via allometric scaling (AS) in 142 subjects (78 males, 64 females; ages 18-40...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199702000-00003
更新日期:1997-02-01 00:00:00
abstract:PURPOSE:The present study investigated the effects of three consecutive days of endurance training under conditions of low energy availability (LEA) on the muscle glycogen content, muscle damage markers, endocrine regulation, and endurance capacity in male runners. METHODS:Seven male long-distance runners (19.9 ± 1.1 ...
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.0000000000002098
更新日期:2020-01-01 00:00:00
abstract:UNLABELLED:Ratings of perceived exertion (RPE) were developed to provide a subjective estimation of exercise intensity during exercise but are also used to produce exercise intensities and to report the intensity of completed exercise sessions. PURPOSE:To determine the relationship between RPE assessed before, during,...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31818a0f09
更新日期:2009-03-01 00:00:00
abstract:PURPOSE:The purpose of this investigation was to determine whether whole body composition could be estimated in tall individuals using summed measures from two partial DXA scans. METHODS:Using a pencil-beam DXA, a convenience sample of young individuals (N = 19) were scanned three times. Two partial scans of the upper...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/01.mss.0000170077.87301.65
更新日期:2005-07-01 00:00:00
abstract:UNLABELLED:The cumulative effect of the female athlete triad (Triad) risk factors on the likelihood of low bone mineral density (BMD) in exercising women is unclear. PURPOSE:This study aimed to determine the risk of low BMD in exercising women with multiple Triad risk factors. METHODS:We retrospectively examined cros...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3182a03b8b
更新日期:2014-01-01 00:00:00
abstract:INTRODUCTION:Common life events, such as getting married or gaining employment, may be opportunities to intervene on health behaviors like physical activity. The purpose of this study was to determine the changes in moderate-to-vigorous physical activity (MVPA) associated with several common life events from adolescenc...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001839
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:The purpose was to evaluate tandem gait (TG), Balance Error Scoring System (BESS), and modified Balance Error Scoring System (mBESS) performance acutely after concussion in collegiate student-athletes. In addition, we sought to evaluate the psychometric properties of TG, including minimal detectable change (MDC...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001540
更新日期:2018-06-01 00:00:00
abstract::Inappropriate cushioning and/or tractional characteristics of sports surfaces are assumed to increase surface-related injuries in various sports activities. Various tests assessing cushioning and frictional properties are currently in use to evaluate sports surfaces with respect to their potential to reduce the number...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:
更新日期:1990-02-01 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:High school cross-country runners have a high incidence of injury, particularly at the shin and knee. An increased step rate during running has been shown to reduce impact forces and loading of the lower extremity joints. The purpose of this prospective study was to examine step rate as a risk factor for injury...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000000890
更新日期:2016-07-01 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
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31828d39bc
更新日期:2013-09-01 00:00:00
abstract:PURPOSE:The goal of this study was to explore the effect of lifelong aerobic exercise (i.e., chronic training) on skeletal muscle substrate stores (intramyocellular triglyceride [IMTG] and glycogen), skeletal muscle phenotypes, and oxidative capacity (ox), in older endurance-trained master athletes (OA) compared with n...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000000789
更新日期:2016-03-01 00:00:00