Abstract：
:Ten eumenorrheic nonathletic women, aged 21-25, were studied on the 8th day following the LH peak in three consecutive cycles. Plasma level and metabolic clearance rate (MCR) of estradiol (E2) and progesterone (P) were measured before and during a 2-h continuous treadmill test at a speed corresponding to 70% of their running speed at anaerobic threshold on three separate occasions. A significant decrease of plasma level of the hormones (-30% and -40%, respectively, P less than 0.01; mean) from resting values was found, while their metabolic clearance rate increased significantly [E2-MCR from 1017 l.d-1 to 1312 l.d-1 (+29%), P less than 0.001; mean; P-MCR from of 2061 l.d-1 to 2988 l.d-1 (+45%), P less than 0.003; mean]. The increase in MCR of the two hormones was significantly correlated with the increase in heart rate and systolic blood pressure accompanying the beginning of the exercise test.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Montagnani CF,Arena B,Maffulli Nsubject
Has Abstractpub_date
1992-07-01 00:00:00pages
764-8issue
7eissn
0195-9131issn
1530-0315journal_volume
24pub_type
杂志文章abstract：PURPOSE:Greater resistance to muscle fatigue has been observed in women versus men and in older versus young individuals. As suggested mechanisms for these differences include task intensity and duty cycle, the purpose of this study was to evaluate fatigue in healthy young and older men and women during maximum-effort ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/mss.0b013e31815bbb93
更新日期：2008-02-01 00:00:00
abstract：PURPOSE:To determine the effect of dietary antioxidant restriction on oxidative stress, antioxidant defenses, and exercise performance in athletes. Oxidative stress has been shown to increase during exercise. To alleviate oxidative stress, a high intake of antioxidant rich foods or supplements may be required in traine...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
doi：10.1249/01.mss.0000150016.46508.a1
更新日期：2005-01-01 00:00:00
abstract：INTRODUCTION:This study examined the effect of endurance exercise on dendritic arborization in the dentate gyrus subregion in rodents exposed to a predator scent stress (PSS). METHODS:Sprague-Dawley rats were randomly assigned to one of four treatment groups. In two of the groups, rats were unexposed to PSS but either...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001038
更新日期：2016-12-01 00:00:00
abstract：:The purpose of this project was to determine whether mild heat stress induced by wearing a wet suit while swimming in relatively warm water (25.4 +/- 0.1 degrees C) increases the risk of heat injury during the cycling and running stages of an International distance triathlon in a hot and humid environment (32 degrees ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199801000-00014
更新日期：1998-01-01 00:00:00
abstract：PURPOSE:The purpose of this study was to provide baseline data on immune status of exercising and sedentary exclusively lactating women. Dietary intake and body composition were also investigated to determine whether they related to immune function. METHODS:Healthy, exclusively breastfeeding women with a body mass ind...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/01.mss.0000128245.39808.36
更新日期：2004-06-01 00:00:00
abstract：PURPOSE:An augmented pulmonary artery wedge pressure (PAWP) response may explain exercise intolerance in some humans. However, routine use of exercise hemodynamic testing is limited by a lack of data from normal older men and women. Our objective was to evaluate the exercise PAWP response and the potential for sexual d...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001227
更新日期：2017-07-01 00:00:00
abstract：:Although no conclusive evidence exists to suggest that vitamin supplementation improves athletic performance in nutritionally adequate individuals, exercise may increase requirements for certain vitamins in individuals with marginal vitamin stores. This review summarizes results from recent research studies of vitamin...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1987-10-01 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
pub_type： 杂志文章
doi：10.1249/MSS.0b013e31826ea8e3
更新日期：2013-02-01 00:00:00
abstract：:We hypothesized that the structure of systemic arteries would be altered following 10-14 wk of hindlimb unloading (tail suspension) in female Sprague-Dawley rats. Tail suspension resulted in atrophy of the soleus muscle (P < or = 0.01) but no significant differences in the mass of the extensor digitorum muscle, heart,...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199710000-00005
更新日期：1997-10-01 00:00:00
abstract：UNLABELLED:Limited information is currently available regarding muscle synergistic patterns and triggered reflex responses during dynamic weight-bearing activities in the presence of muscle fatigue. PURPOSE:The purpose of this study was to examine the effects of quadriceps muscle fatigue on patterns of muscle activati...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e3181d85527
更新日期：2010-09-01 00:00:00
abstract：:Previous studies have suggested that, for the same power output, arm exercise requires higher oxygen uptake (VO2), carbon dioxide output (VCO2), and ventilation (VE) than leg exercise and that response kinetics are slower. To evaluate these differences, four healthy subjects performed a total of 95 arm cranking tests....
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1992-12-01 00:00:00
abstract：:The individual anaerobic threshold (IAT) is the highest metabolic rate at which blood lactate (LA) concentrations are maintained at a steady state during prolonged exercise. The purpose of this study was to compare the effects of active and passive recovery on the determination of the IAT before and after an endurance...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
doi：
更新日期：1989-10-01 00:00:00
abstract：:Cardiorespiratory characteristics, relative body fat, grip strength and selected skinfolds, circumferences and bone diameters were determined in 25 males and 25 females (31--55 yr) whose exclusive mode of regular exercise was tennis (9.7--11.1 hr/wk). Mean resting heart rates were 54 beats/min for the males and 61 bea...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1980-01-01 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
pub_type： 杂志文章
doi：10.1249/MSS.0000000000002247
更新日期：2020-06-01 00:00:00
abstract：PURPOSE:This study investigated the combined effects of exercise and smoking cessation on serum lipids. METHODS:Eighteen female smokers quit smoking using standard behavioral methods combined with exercise (N = 9) or with a nonexercise contact time control (N = 9). The smoking cessation program for both groups consist...
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：10.1097/00005768-199809000-00010
更新日期：1998-09-01 00:00:00
abstract：PURPOSE:This study aimed to test whether incident kidney cancer risk is associated with exercise energy expenditure (i.e., metabolic equivalents, 1 MET) when calculated from distance walked or run. METHODS:Hazard ratios (HR) and 95% confidence intervals (95% CI) from Cox proportional hazard analyses of self-reported p...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e3182a4e89c
更新日期：2014-02-01 00:00:00
abstract：UNLABELLED:Migrating birds have been able to sustain an energy expenditure (EE) that is five times their basal metabolic rate. Although humans can readily reach these levels, it is not yet clear what levels can be sustained for several days. PURPOSE:The study's purposes were 1) to determine the upper limits of human E...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,meta分析,评审
doi：10.1249/MSS.0b013e31822430ed
更新日期：2011-12-01 00:00:00
abstract：PURPOSE:The aim of this study was to test the hypothesis that intermittent hypoxic interval training improves sea level cycling performance more than equivalent training in hypoxia or normoxia. METHODS:Thirty-three well-trained cyclists and triathletes (25.9 +/- 2.7 yr, VO(2max) 66.1 +/- 6.1 mL.min(-1).kg(-1)) were di...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
doi：10.1249/01.mss.0000150077.30672.88
更新日期：2005-01-01 00:00:00
abstract：INTRODUCTION:Physical activity may affect health via DNA methylation. The epigenetic influences of sedentary behaviors such as television viewing are unknown. We performed a genomewide study of DNA methylation in peripheral blood in relation to physical activity and television viewing time. METHODS:DNA methylation was...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001827
更新日期：2019-03-01 00:00:00
abstract：INTRODUCTION:Increased sedentary behavior predicts greater cardiovascular morbidity and mortality and does so independently of physical activity (PA). This association is only partially explained by body mass index (BMI) and overall body fat, suggesting mechanisms besides general increased adiposity. The purpose of thi...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e3182a77220
更新日期：2014-03-01 00:00:00
abstract：PURPOSE:The purpose of this study was to measure noninvasively the absolute concentrations of muscle adenosine triphosphate [ATP], phosphocreatine [PCr], inorganic phosphate (Pi), and glycogen [Gly] of elite soccer players. METHODS:Magnetic resonance spectroscopy (31P- and 13C-MRS) was used to measure the concentratio...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199911000-00013
更新日期：1999-11-01 00:00:00
abstract：UNLABELLED:Accurate assessments of both physical activity and sedentary behaviors are crucial to understand the health consequences of movement patterns and to track changes over time and in response to interventions. PURPOSE:The study evaluates the validity of an integrative, machine learning method for processing ac...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000000915
更新日期：2016-08-01 00:00:00
abstract：INTRODUCTION:Loud sounds can decrease reaction time (RT) and increase force generated during voluntary contractions. Accordingly, we hypothesized that the loud starter's pistol at the Olympic Games allows runners closer to the starter to react sooner and stronger than runners farther away. METHODS:RT for the 100/110 m...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e31816770e1
更新日期：2008-06-01 00:00:00
abstract：PURPOSE:Evidence suggests that female adolescents and those living in urban environments may have lower physical activity (PA) levels compared with their peers. Yet few studies report PA for urban adolescent females, and there is no consensus regarding potential causes for low PA in this subgroup. We examined PA levels...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001152
更新日期：2017-04-01 00:00:00
abstract：PURPOSE:To examine the relationship between variable lower-limb coordination and shoulder joint kinetics and kinematics in the high-performance flat first serve in tennis. METHODS:Three-dimensional data describing three flat serve (FS) techniques, each executed with varying lower-limb involvement: foot-up (FU), foot-b...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/mss.0b013e31815c6d61
更新日期：2008-02-01 00:00:00
abstract：PURPOSE:The purpose of this study was to determine the accuracy and reliability of the following electronic pedometers for measuring steps: Freestyle Pacer Pro (FR), Kenz Lifecorder (KZ), New Lifestyles NL-2000 (NL), Omron HJ-105 (OM), Oregon Scientific PE316CA (OR), Sportline 330 (SL330) and 345 (SL345), Walk4Life LS ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/01.MSS.0000089342.96098.C4
更新日期：2003-10-01 00:00:00
abstract：PURPOSE:To comprehensively quantify through daily, serial measures changes in knee laxity as a function of changing sex-hormone levels across one complete menstrual cycle. METHODS:Twenty-five females, 18 - 30 yr, body mass index < or = 30, who reported normal menstrual cycles (28-32 d) over the past 6 months participa...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/01.mss.0000132270.43579.1a
更新日期：2004-07-01 00:00:00
abstract：:Exercise represents the primary countermeasure used during spaceflight to maintain or restore maximal aerobic capacity (VO2max), musculoskeletal structure, and orthostatic function. However, no single exercise or combination of prescriptions has proven entirely effective in restoring cardiovascular and musculoskeletal...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
doi：10.1097/00005768-199608000-00010
更新日期：1996-08-01 00:00:00
abstract：:Habitual physical activity reduces coronary heart disease events, but vigorous activity can also acutely and transiently increase the risk of sudden cardiac death and acute myocardial infarction in susceptible persons. This scientific statement discusses the potential cardiovascular complications of exercise, their pa...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
doi：10.1249/mss.0b013e3180574e0e
更新日期：2007-05-01 00:00:00
abstract：PURPOSE:This study was undertaken to determine whether endurance training is associated with changes in myocardial perfusion in humans. METHODS:Myocardial perfusion was measured in eleven trained and nine sedentary men at rest and during adenosine-stimulated hyperemia using positron emission tomography (PET). Left ven...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
doi：10.1097/00005768-200206000-00007
更新日期：2002-06-01 00:00:00
