Mechanisms and patterns of blood lactate increase during exercise in man.

abstract：:Forty male and 40 female rats were randomly assigned to 1 of 4 experimental groups. Half of the animals of each gender were exercised by jumping (weighted by a vest with up to 70% body weight) to a height of 16 cm 20 times X d-1 (30 s between jumps) 5 d X wk-1 for 8 wk. Half of the exercised animals and half of the se...

journal_title：Medicine and science in sports and exercise

authors： Leeds EM,Wilkerson JE,Brown GD,Kamen G,Bredle D

更新日期：1986-12-01 00:00:00

abstract：:Although onset and maximal claudication pain are attained sooner as exercise intensity is increased, it is unclear whether dissipation of pain during recovery is altered. Thus, this study examined whether walking at gradually higher intensity would prolong the time needed for claudication pain to dissipate during reco...

journal_title：Medicine and science in sports and exercise

authors： Gardner AW

更新日期：1993-08-01 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：: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：PURPOSE:Evasive sidestepping during sports commonly results in noncontact anterior cruciate ligament injuries. Sidestepping in response to different simple visual stimuli has been studied previously but never investigated using quasi-game-realistic visual conditions. We compared the biomechanics of high-level and low-l...

journal_title：Medicine and science in sports and exercise

authors： Lee MJ,Lloyd DG,Lay BS,Bourke PD,Alderson JA

更新日期：2013-09-01 00:00:00

abstract：:To determine the relation of plasma volume change to intensity of weight lifting, blood samples were obtained from 15 males [mean (+/- SD) age = 22.3 +/- 3.2 yr; height = 176.3 +/- 6.9 cm; weight = 73.0 +/- 11.7 kg] before and over a 60-min period following weight lifting at four different intensities [40, 50, 60, and...

journal_title：Medicine and science in sports and exercise

authors： Collins MA,Cureton KJ,Hill DW,Ray CA

更新日期：1989-04-01 00:00:00

abstract：PURPOSE:Investigate hemodynamic responses of resistance exercise (RE) with moderate load (i.e., international guidelines for RE of patients) versus RE with high load in patients with coronary artery disease (CAD). METHODS:Medically stable male (n = 11) and female patients (n = 4) treated with PCI or percutaneous coron...

journal_title：Medicine and science in sports and exercise

authors： Gjøvaag TF,Mirtaheri P,Simon K,Berdal G,Tuchel I,Westlie T,Bruusgaard KA,Nilsson BB,Hisdal J

更新日期：2016-04-01 00:00:00

abstract：PURPOSE:The best sprint performances are usually reached between the ages of 20 and 30 yr; however, even in well-trained individuals, performance continues to decrease with age. Although this inevitable decrease in performance has been related to reductions in muscular force, velocity, and power capabilities, these mea...

journal_title：Medicine and science in sports and exercise

authors： Pantoja PD,Saez DE Villarreal E,Brisswalter J,Peyré-Tartaruga LA,Morin JB

更新日期：2016-12-01 00:00:00

abstract：PURPOSE:For treatment of various knee disorders, muscles are trained in open or closed kinetic chain tasks. Coordination between the heads of the quadriceps muscle is important for stability and optimal joint loading for both the tibiofemoral and the patellofemoral joint. The aim of this study was to examine whether th...

journal_title：Medicine and science in sports and exercise

authors： Stensdotter AK,Hodges PW,Mellor R,Sundelin G,Häger-Ross C

更新日期：2003-12-01 00:00:00

abstract：:The uptake of zinc (Zn) into the plasma after the ingestion of 25 mg of Zn from multivitamin-mineral supplement was studied in 10 men during running (R) and control (C) conditions; the R was for 2 h at 60-65% of their maximal oxygen uptake. Subjects took the supplement with 200 ml of deionized water before the R or C ...

journal_title：Medicine and science in sports and exercise

authors： Singh A,Moses FM,Smoak BL,Deuster PA

更新日期：1992-04-01 00:00:00

abstract：INTRODUCTION:This study examined the influence of a supplement matrix on the excretion pattern of nandrolone metabolites in response to ingestion of a trace amount of 19-norandrostenedione. METHODS:Ten male and nine female volunteers (mean ± SD: age = 26 ± 3 yr, height = 1.71 ± 0.09 m, body mass = 70.9 ± 13.2 kg) were...

journal_title：Medicine and science in sports and exercise

authors： Watson P,Houghton E,Grace PB,Judkins C,Dunster PM,Maughan RJ

更新日期：2010-04-01 00:00:00

abstract：PURPOSE:This study was conducted to test whether a low-frequency vibration-like stimulus (rapid variable resistance) applied during a single session of knee extension exercise would alter muscle performance. METHODS:Torque, knee joint angle, EMG activity of rectus femoris (RF) and vastus lateralis (VL) muscles, and VL...

journal_title：Medicine and science in sports and exercise

authors： Mileva KN,Naleem AA,Biswas SK,Marwood S,Bowtell JL

更新日期：2006-07-01 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

authors： Lee J,Lee S,Shin S,Kang HS

更新日期：2005-07-01 00:00:00

abstract：PURPOSE:To validate the 7-d Physical Activity Recall (PAR) telephone interview version and its activity intensity categories. METHODS:Seventy-four adults (47 women, 27 men), ranging in age (18-67) and activity levels, were interviewed by phone and in-person using the same PAR protocol. Each participant wore a TriTrac-...

journal_title：Medicine and science in sports and exercise

authors： Hayden-Wade HA,Coleman KJ,Sallis JF,Armstrong C

更新日期：2003-05-01 00:00:00

abstract：PURPOSE:Investigate development of specific performance adaptions and hormonal responses every fourth week during a 12-wk high-intensity training (HIT) period in groups with different interval-training prescriptions. METHODS:Sixty-three well-trained cyclists performing a 12-wk intervention consisting of two to three H...

journal_title：Medicine and science in sports and exercise

authors： Sylta Ø,Tønnessen E,Sandbakk Ø,Hammarström D,Danielsen J,Skovereng K,Rønnestad BR,Seiler S

更新日期：2017-06-01 00:00:00

abstract：PURPOSE:The aim of this study was to assess the feasibility and the effects of a long-term training program with endurance and strength elements for patients with advanced congestive heart failure (CHF). METHODS:We studied 14 patients, mean age 57 yr, mean NYHA class 2.7, mean LVEF 29%, and mean VO2max 17.2 mL x kg(-1...

journal_title：Medicine and science in sports and exercise

authors： Delagardelle C,Feiereisen P,Krecké R,Essamri B,Beissel J

更新日期：1999-08-01 00:00:00

abstract：PURPOSE:The objective of this study is to investigate the effect of three different workplace interventions on long-term compliance, muscle strength gains, and neck/shoulder pain in office workers. METHODS:A 1-yr randomized controlled intervention trial was done with three groups: specific resistance training (SRT, n ...

journal_title：Medicine and science in sports and exercise

authors： Andersen LL,Jørgensen MB,Blangsted AK,Pedersen MT,Hansen EA,Sjøgaard G

更新日期：2008-06-01 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

authors： Gladden LB

更新日期：2008-03-01 00:00:00

abstract：PURPOSE:The SenseWear Pro2 Armband (SWA; BodyMedia, Inc., Pittsburg, PA), the Intelligent Device for Energy Expenditure and Activity (IDEEA; Minisun LLC, Fresno, CA), and the ActiReg (AR; PreMed AS, Oslo, Norway) were compared with indirect calorimetry to determine the ability of these devices to assess energy cost in ...

journal_title：Medicine and science in sports and exercise

authors： Arvidsson D,Slinde F,Larsson S,Hulthén L

更新日期：2009-03-01 00:00:00

abstract：PURPOSE:We asked whether submaximal exercise with chest wall restriction (CWR), as a model of restrictive pulmonary disease, would result in fatigue of the diaphragm in healthy humans. METHODS:To address this question, we used cervical magnetic stimulation of the phrenic nerves along with measures of transdiaphragmati...

journal_title：Medicine and science in sports and exercise

authors： Tomczak SE,Guenette JA,Reid WD,McKenzie DC,Sheel AW

更新日期：2011-03-01 00:00:00

abstract：:We develop an observation system that quantifies the duration, intensity, and frequency of children's physical activities. We use this system to assess the level and tempo of energy expenditure under free-ranging, natural conditions experienced by 15 children aged 6-10 yr in southern California. Observations were reco...

journal_title：Medicine and science in sports and exercise

authors： Bailey RC,Olson J,Pepper SL,Porszasz J,Barstow TJ,Cooper DM

更新日期：1995-07-01 00:00:00

abstract：PURPOSE:We investigated the knee-extensor torque at which reoxygenation (inflow of arterial blood) during an isometric contraction stopped, whether this torque depended on maximal torque capacity (MTC), and whether there were differences among the synergists. METHODS:Isometric knee-extension torque was measured using ...

journal_title：Medicine and science in sports and exercise

authors： de Ruiter CJ,Goudsmit JF,Van Tricht JA,de Haan A

更新日期：2007-03-01 00:00:00

abstract：:This article provides an overview of the history behind the physiological concepts defining the role of the arterial baroreflexes and their regulation of arterial blood pressure during dynamic exercise. Initially, the case is made as to "why the arterial baroreflexes must be involved with blood pressure regulation dur...

journal_title：Medicine and science in sports and exercise

authors： Raven PB

更新日期：2008-12-01 00:00:00

abstract：:This report demonstrates the effect of voluntary exercise in attenuating increases in heart rate (HR) caused by chronic stress in an animal model of stress-induced hypertension, the borderline hypertensive rat (BHR). Exercise training also protected against the hypertensive effects of stress in 16-wk-old, but not 10-w...

journal_title：Medicine and science in sports and exercise

authors： Squire JM,Myers MM,Fried R

更新日期：1987-02-01 00:00:00

abstract：PURPOSE:Regular physical activity leads to a more favorable cardiovascular risk factor profile and a lower risk of developing incident coronary heart disease (CHD). These correlations suggest that higher levels of physical activity should also attenuate the presence and extent of coronary atherosclerosis. METHODS:Phys...

journal_title：Medicine and science in sports and exercise

authors： Taylor AJ,Watkins T,Bell D,Carrow J,Bindeman J,Scherr D,Feuerstein I,Wong H,Bhattarai S,Vaitkus M,O'Malley PG

更新日期：2002-02-01 00:00:00

abstract：PURPOSE:The present study examined the effect of extreme old age on the plasticity of the rat plantaris muscle in response to an increase in mechanical load. METHODS:Male Fischer 344 rats, aged 7 months (adult) and 25 months (old) underwent bilateral surgical ablation of the gastrocnemius muscle to functionally overlo...

journal_title：Medicine and science in sports and exercise

authors： Linderman JK,Blough ER

更新日期：2002-07-01 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

authors： Schneider PL,Crouter SE,Lukajic O,Bassett DR Jr

更新日期：2003-10-01 00:00:00

abstract：PURPOSE:To quantify the relationship between total training load and running performance during the most important competitions of the season (national cross-country championships, 4.175- and 10.130-km races). METHODS:Eight well-trained, subelite endurance runners (age (mean+/-SD): 23+/-2 yr; VO2max: 70.0+/-7.3 mL.kg....

journal_title：Medicine and science in sports and exercise

authors： Esteve-Lanao J,San Juan AF,Earnest CP,Foster C,Lucia A

更新日期：2005-03-01 00:00:00

abstract：:The purpose of the study was to examine the effects of surgical and nonsurgical treatment of previously immobilized ankle fractures on voluntary and evoked contractile properties before and following fatigue. Twelve control and 12 previously immobilized (4-14 wk postfracture) internally fixated and nonfixated ankles w...

journal_title：Medicine and science in sports and exercise

authors： Behm DG,St-Pierre DM

更新日期：1997-09-01 00:00:00

abstract：:The effects of endurance training on tissue antioxidant and oxidative enzyme activities were determined in heart, liver, and five skeletal muscles of female rats. Rats were fed either normal (+E) or vitamin E free (-E) diets for 16 wk. For the final 8 wk, subgroups of +E and -E diet animals were trained by treadmill r...

journal_title：Medicine and science in sports and exercise

authors： Tiidus PM,Houston ME

更新日期：1994-03-01 00:00:00