The validity and relevance of tests used for the assessment of sports surfaces.

abstract：:In a cross-sectional study, 50 elderly women (age 71.5 +/- 4.2 yr, mean +/- SD) participated in a battery of tests assessing several aspects of physical fitness. The women were selected based on tertiles of habitual physical activity as determined by a validated questionnaire 10 months ago. The tests comprised the fol...

journal_title：Medicine and science in sports and exercise

authors： Voorrips LE,Lemmink KA,van Heuvelen MJ,Bult P,van Staveren WA

更新日期：1993-10-01 00:00:00

abstract：:The knee joints of 81 veteran soccer players between ages 40 and 74 were examined. An analysis of and relationships between soccer practice at a top level, osteoarthritis, meniscectomy, and leg axes were evaluated. One-hundred and sixty-two knees were assessed through clinical examination and X-ray examination using a...

journal_title：Medicine and science in sports and exercise

authors： Chantraine A

更新日期：1985-08-01 00:00:00

abstract：PURPOSE:Lower-limb muscle weakness has often been reported in COPD, and contributes to exercise intolerance. Controversial information is available regarding upper-limb muscle adaptations and the influence of muscle wasting on muscle weakness. We investigated leg and arm muscle function in 59 stable COPD patients (GOLD...

journal_title：Medicine and science in sports and exercise

authors： Franssen FM,Broekhuizen R,Janssen PP,Wouters EF,Schols AM

更新日期：2005-01-01 00:00:00

abstract：:MRI is an excellent noninvasive method of diagnosing difficult shoulder problems. Although usually not needed for classic primary impingement syndrome or clinically obvious rotator cuff tears, MRI may be helpful in diagnosing secondary causes of impingement or in some cases involving partial rotator cuff tears. Some s...

journal_title：Medicine and science in sports and exercise

authors： Ertl JP,Kovacs G,Burger RS

更新日期：1998-04-01 00:00:00

abstract：PURPOSE:This study was designed to determine whether serum leptin levels were affected by a 5-d military course after 3 wk of combat training. METHODS:26 male soldiers (mean age = 21 +/- 2 yr) were examined at the beginning of the training program and just at the end of the 5-d course. The combination of continuous he...

journal_title：Medicine and science in sports and exercise

authors： Gomez-Merino D,Chennaoui M,Drogou C,Bonneau D,Guezennec CY

更新日期：2002-10-01 00:00:00

abstract：:To compare the physiological response to a cocaine-exercise challenge in cocaine-conditioned animals with that of acute-cocaine animals, rats were injected i.p. with either cocaine (20 mg.kg-1) or saline, twice daily for 14 consecutive days. On the 15th day (test day) cocaine-conditioned rats received an i.v. injectio...

journal_title：Medicine and science in sports and exercise

authors： Kelly KP,Han DH,Fellingham GW,Winder WW,Conlee RK

更新日期：1995-01-01 00:00:00

abstract：INTRODUCTION:Slow gait predicts many adverse clinical outcomes in old adults, but the mechanisms of how power training can minimize the age-related loss of gait velocity is unclear. We examined the effects of 10 wk of lower extremity power training and detraining on healthy old adults' lower extremity muscle power and ...

journal_title：Medicine and science in sports and exercise

authors： Beijersbergen CM,Granacher U,Gäbler M,Devita P,Hortobágyi T

更新日期：2017-01-01 00:00:00

abstract：:Facial cooling (FC) elicits a marked bradycardia at rest that appears to be reduced during exercise. This study was done to delineate the effects of exercise mediated central command from those of muscle afferent feedback and sympathetic stimulation on the attenuation of the bradycardic effect of FC during the onset o...

journal_title：Medicine and science in sports and exercise

authors： Smith JC,Stephens DP,Winchester PK,Williamson JW

更新日期：1997-03-01 00:00:00

abstract：:Throughout a beat swinging motion prior to a kip the gymnast changes the relative orientation of his legs and head-torso with respect to his arms. It was observed that if these changes occurred in a correct order he could rapidly increase his swing with his limited strength. If changes in orientation of the body parts...

journal_title：Medicine and science in sports and exercise

authors： Boykin WH,Breskman D

更新日期：1980-04-01 00:00:00

abstract：:The present study examined the validity of selected bioelectrical impedance (BIA) equations for estimating percent fat (% fat) in males and compared their validity with that of a commonly used skinfold equation (Sum3). One-hundred twenty-two Caucasian males (X +/- SD = 12.5 +/- 5.8% fat, as determined by underwater we...

journal_title：Medicine and science in sports and exercise

authors： Eckerson JM,Stout JR,Housh TJ,Johnson GO

更新日期：1996-04-01 00:00:00

abstract：PURPOSE:To examine longitudinal change in cardiorespiratory fitness and odds of incident sleep problems. METHODS:A cohort of 7368 men and 1155 women, age 20-85 yr, was recruited from the Aerobics Center Longitudinal Study. The cohort did not complain of sleep problems, depression, or anxiety at their first clinic visi...

journal_title：Medicine and science in sports and exercise

authors： Dishman RK,Sui X,Church TS,Kline CE,Youngstedt SD,Blair SN

更新日期：2015-05-01 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

authors： Reid M,Elliott B,Alderson J

更新日期：2008-02-01 00:00:00

abstract：:This study investigates the relationship between exercise and dietary macronutrient selection. Female Sprague-Dawley rats (5 months old) were placed on a macronutrient self-selection diet for 15 wk. Three food cups, each containing a separate vitamin and mineral supplemented macronutrient, i.e., fat, carbohydrate, or ...

journal_title：Medicine and science in sports and exercise

authors： Miller GD,Dimond AG,Stern JS

更新日期：1994-12-01 00:00:00

abstract：:This study compared the effects of exercise or TXB2 and beta-TG when evaluated by four methods: 1) not adjusted; 2) adjusted for plasma volume changes (PV); 3) standardized per 10(5) platelets (PC); 4) or both PC and PV (PC-PV). Blood was collected from 16 men (41.3 +/- 8.1 yr) at rest after 30 min of exercise (IPE) a...

journal_title：Medicine and science in sports and exercise

authors： Todd MK,Goldfarb AH,Burleson C

更新日期：1997-05-01 00:00:00

abstract：PURPOSE:This study aimed to examine the influence of sagittal plane trunk posture on lower extremity energetics during running. METHODS:Forty asymptomatic recreational runners (20 males and 20 females) ran overground at a speed of 3.4 m·s(-1). Sagittal plane trunk kinematics and lower extremity kinematics and energeti...

journal_title：Medicine and science in sports and exercise

authors： Teng HL,Powers CM

更新日期：2015-03-01 00:00:00

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

authors： Stickley CD,Hetzler RK,Kimura IF,Lozanoff S

更新日期：2009-11-01 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

authors： McLellan TM,Jacobs I

更新日期：1989-10-01 00:00:00

abstract：PURPOSE:The primary study aim was to evaluate associations of estimated weekly minutes of moderate-to-vigorous-intensity exercise from self-reports of the telephone-administered 7-Day Physical Activity Recall (7-Day PAR) with data captured by the RT3 triaxial accelerometer. METHODS:This investigation was undertaken as...

journal_title：Medicine and science in sports and exercise

authors： Sloane R,Snyder DC,Demark-Wahnefried W,Lobach D,Kraus WE

更新日期：2009-06-01 00:00:00

abstract：PURPOSE:Compelling evidence suggests larger performance decrements during hypoxic versus normoxic repeated sprinting. Yet the underlying mechanical alterations have not been thoroughly investigated. Therefore, we examined the effects of different levels of normobaric hypoxia on running mechanical performance during rep...

journal_title：Medicine and science in sports and exercise

authors： Brocherie F,Millet GP,Morin JB,Girard O

更新日期：2016-08-01 00:00:00

abstract：:Cyclic AMP increases in liver during exercise, the magnitude of the increase being dependent on duration and intensity of the exercise. Within limits, the increase in cAMP is closely correlated with the rate of glycogenolysis and with the exercise intensity. It is unlikely that epinephrine is involved in determining c...

journal_title：Medicine and science in sports and exercise

authors： Winder WW

更新日期：1988-12-01 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

authors： Da Silva AS,Pauli JR,Ropelle ER,Oliveira AG,Cintra DE,De Souza CT,Velloso LA,Carvalheira JB,Saad MJ

更新日期：2010-12-01 00:00:00

abstract：PURPOSE:Despite endorsement by various health organizations, there is a lack of research on the effectiveness of perceptually regulated exercise training (PRET) as a method of exercise intensity prescription. The purpose of this study was to confirm the efficacy of an 8-wk PRET program clamped at RPE13 to improve aerob...

journal_title：Medicine and science in sports and exercise

authors： Parfitt G,Evans H,Eston R

更新日期：2012-08-01 00:00:00

abstract：:The taper is a progressive nonlinear reduction of the training load during a variable period of time, in an attempt to reduce the physiological and psychological stress of daily training and optimize sports performance. The aim of the taper should be to minimize accumulated fatigue without compromising adaptations. Th...

journal_title：Medicine and science in sports and exercise

authors： Mujika I,Padilla S

更新日期：2003-07-01 00:00:00

abstract：INTRODUCTION:The isometric muscle force attained after active stretch is greater than that attained in a purely isometric contraction. This property is referred to as residual force enhancement (RFE). Because RFE is thought to be caused by a titin-based passive force, it should be preserved in reduced contractile force...

journal_title：Medicine and science in sports and exercise

authors： Fukutani A,Herzog W

更新日期：2018-06-01 00:00:00

abstract：PURPOSE:Supplementation with inorganic nitrate has been suggested to be an ergogenic aid for athletes as nitric oxide donor. The purpose of this study was to determine whether ingestion of inorganic sodium nitrate benefits well-trained athletes performing a 40-min exercise test in laboratory conditions. In addition, we...

journal_title：Medicine and science in sports and exercise

authors： Bescós R,Ferrer-Roca V,Galilea PA,Roig A,Drobnic F,Sureda A,Martorell M,Cordova A,Tur JA,Pons A

更新日期：2012-12-01 00:00:00

abstract：:The purpose of this study was to compare the rate of gastric emptying of 20 g.l-1 (2G), 40 g.l-1 (4G), and 60 g.l-1 (6G) glucose solutions with that of water (W). On separate occasions in randomized order, a 600-ml test solution was instilled into the stomach of each of six healthy male volunteers. Gastric emptying wa...

journal_title：Medicine and science in sports and exercise

authors： Vist GE,Maughan RJ

更新日期：1994-10-01 00:00:00

abstract：:Compared with level walking or running, progressive downhill walking or running requires a decreasing energy cost to some minimum where the cost again increases with further decrements in grade. Margaria estimated this minimum occurs at a -9% grade. In this study an attempt was made to more precisely track the energy ...

journal_title：Medicine and science in sports and exercise

authors： Wanta DM,Nagle FJ,Webb P

更新日期：1993-01-01 00:00:00

abstract：:Oxidation-reduction (redox) based regulation of gene expression appears to be a fundamental regulatory mechanism in cell biology. This basic information has been exploited to develop novel strategies in clinical therapeutics. In contrast to the conventional idea that reactive species mostly serve as a trigger for oxid...

journal_title：Medicine and science in sports and exercise

authors： Sen CK

更新日期：2001-03-01 00:00:00

abstract：PURPOSE:Quadriceps strength deficits persist for years after anterior cruciate ligament (ACL) reconstruction, and patients with these deficits often shift torque demands away from the knee extensors to the hip during functional tasks. However, it is not clear how quadriceps strength deficits may affect hip strength. Th...

journal_title：Medicine and science in sports and exercise

authors： Bell DR,Trigsted SM,Post EG,Walden CE

更新日期：2016-10-01 00:00:00

abstract：PURPOSE:This study evaluated the predictive validity of three previously published ActiGraph energy expenditure (EE) prediction equations developed for children and adolescents. METHODS:A total of 45 healthy children and adolescents (mean age: 13.7 +/- 2.6 yr) completed four 5-min activity trials (normal walking, bris...

journal_title：Medicine and science in sports and exercise

authors： Trost SG,Way R,Okely AD

更新日期：2006-02-01 00:00:00