Abstract：
:It has been recently suggested that high and sustained lactate levels may elicit increases in peripheral B-EN concentrations (16). We have observed elevated and sustained lactate concentrations in response to a low-volume resistive exercise protocol (14) that were similar to those from other exercise protocols that produced elevated beta-endorphin (B-EN) concentrations. Thus, the purpose of the study was to determine the effects of a low-volume (21,700 J) resistive exercise repetition maximum (RM) protocol using weight machines on peripheral lactate, B-EN and cortisol concentrations. Subjects completed 3 sets of bench press, lat-pull, leg extension, and leg curl exercise at a 10-RM load. Blood samples were collected and rating of perceived exertion (RPE, 15-point Borg scale) was assessed before exercise (-40 and -10 min), after each exercise, and after the exercise session (+ 35 min); blood samples were collected at 7 additional post-exercise times. RPE increased significantly throughout the exercise. Lactate concentrations rose significantly to peak at 8.54 mM at LE. B-EN and cortisol concentrations (-10) of 4.63 +/- 0.54 pmol.l-1 and 12.09 +/- 1.44 micrograms.dl-1, respectively, were not significantly elevated over time. The data suggest that a low-volume resistive exercise protocol using weight machines elevates lactate concentrations without altering B-EN and cortisol concentrations.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Kraemer RR,Acevedo EO,Dzewaltowski D,Kilgore JL,Kraemer GR,Castracane VDdoi
10.1055/s-2007-972801subject
Has Abstractpub_date
1996-01-01 00:00:00pages
12-16issue
1eissn
0172-4622issn
1439-3964journal_volume
17pub_type
杂志文章abstract：:The use of aero style handlebars has gained popularity in triathlons and individual time trial events recently. The effect of using these handlebars has only been examined during short term exercise. It was the aim of this investigation to compare time to exhaustion and selected measures of ventilation, gas exchange a...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021013
更新日期：1994-01-01 00:00:00
abstract：:Limited data exist concerning exercise training-induced alterations in skeletal muscle oxidative and antioxidant enzyme activity in senescent animals. Therefore, the purpose of this study was twofold: 1) to examine the exercise training-induced changes in oxidative and antioxidant enzyme activity in skeletal muscle of...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021290
更新日期：1992-07-01 00:00:00
abstract：:The effects of long distance running training (up to 40km/day) on the biomechanical properties of young canine articular cartilage were investigated using in situ indentation creep technique. The stiffness of articular cartilage was determined in the form of instantaneous and equilibrium shear moduli. The rate of cart...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021056
更新日期：1994-07-01 00:00:00
abstract：:This study evaluated the respiratory effects of a single dive in children. Eighteen young divers and 18 controls participated in our study (age range: 9 - 13 years). Volumes and expiratory flow rates were measured 20 minutes before and 10 minutes after one air dive (3 meters, 25 minutes). Before the dive, no differenc...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2006-923810
更新日期：2006-11-01 00:00:00
abstract：:This study compared physical characteristics (body height [BH], body mass [BM], body fat [BF], and fat free mass [FFM]), one repetition maximum bench press (1RM (BP)), jumping explosive power (VJ), handball throwing velocity, power-load relationship of the leg and arm extensor muscles, 5- and 15-m sprint running time,...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-964989
更新日期：2007-10-01 00:00:00
abstract：:The energy cost of the forms of locomotion discussed throughout this article is summarized in Table 9. This table, as well as the preceding sections of this article, are designed to provide a rather comprehensive and simple set of information for potential readers: medical doctors, who should be able to prescribe to t...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2008-1025736
更新日期：1986-04-01 00:00:00
abstract：:The purpose of this study was to compare Anaerobic Work Capacity (AWC) measured on an isoinertial or an isokinetic bicycle ergometer. Twelve male participants completed two randomly ordered exercise testing sessions including a torque-velocity test followed by a 30-s all-out test on an isokinetic ergometer, or a force...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0029-1233466
更新日期：2010-02-01 00:00:00
abstract：:In a group of male distance runners, 23 out of 45 athletes showed decreased serum ferritin values (< 35 micrograms). The high prevalence of a typical iron deficiency in runners was confirmed in a subgroup of eight athletes in which the iron metabolism was studied in detail using radio-iron labelling and liver iron qua...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972881
更新日期：1996-10-01 00:00:00
abstract：:In the last decade the study of the human muscle mechanics and energetics in physiology and pathology underwent a radical change. Indeed, the use of biopsy is being progressively accompanied by non-invasive techniques which allow a more integrative assessment of muscle function in vivo. Magnetic resonance imaging (MRI...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2007-972724
更新日期：1997-10-01 00:00:00
abstract：:We tested the hypothesis that time course of O (2) uptake (VO (2)) measured during a supramaximal exercise performed in the field is driven to maximal oxygen uptake (VO (2max)). On an outdoor track, five middle-distance male runners first performed a test to determine VO (2max) and a supramaximal 800-m running test at...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2004-820998
更新日期：2005-05-01 00:00:00
abstract：:Cardiac vagal tone (CVT), a key determinant of resting heart rate (HR), is progressively withdrawn with incremental exercise and nearly abolished at maximal effort. While maximal HR decreases with age, there remains a large interindividual variability of results for any given age. In the present study, we hypothesized...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0032-1323818
更新日期：2013-06-01 00:00:00
abstract：:Metabolic syndrome (MetS) is a cluster of cardiometabolic risk factors with high prevalence among adult populations and elevated costs for public health systems worldwide. Despite the lack of consensus regarding the syndrome definition and diagnosis criteria, it is characterized by the coexistence of risk factors such...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1263-0898
更新日期：2020-10-19 00:00:00
abstract：:To study the hypothesis that more severe damage, caused by controlled lengthening (L) contractions, results in greater myofiber hypertrophy compared to increase in fiber size followed shortening (S) contractions, tibialis anterior muscles of anesthesized male Wistar rats were subjected to 240 either L or S contraction...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2000-8869
更新日期：2000-02-01 00:00:00
abstract：:This study investigated whether the combination of internal precooling (PC) and internal midcooling (MC cooling during exercise) would enhance performance more than MC alone. 9 trained males completed two 30-km cycling trials in a hot and humid environment (WBGT: 29±0.7°C, 80±0.02% relative humidity). For 30 min befor...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0042-107597
更新日期：2016-12-01 00:00:00
abstract：:This investigation evaluated the effects of beverage carbonation and carbohydrate (CHO) content on fluid replacement following exercise/thermal dehydration. On four occasions separated by at least 7 days, eight healthy men cycled at 50% of VO2max in a hot environmental chamber (40 degrees C, 40% relative humidity) unt...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1055/s-2007-1021268
更新日期：1992-05-01 00:00:00
abstract：:The purpose of this study was to evaluate the accuracy and the repeatability of a new running computer system (RS800sd, Polar, Kempele, Finland) which included the measurement of running speed (RS) and stride rate (SR). Eight well-trained triathletes participated in this study. First, they completed an incremental con...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0028-1105936
更新日期：2009-05-01 00:00:00
abstract：:The purpose of this study was to analyse intramuscular perfusion response in ultrastructural muscle lesions, by applying contrast-enhanced ultrasound (CEUS) to a delayed onset muscle soreness (DOMS) model. Results of this analysis were compared to high-resolution 3 Tesla MRI T2-weighted sequences. 14 healthy participa...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0043-112501
更新日期：2017-10-01 00:00:00
abstract：:Meniscocapsular separations are often seen in knees with other intra-articular pathology. The consequences of these tears with regard to knee contact mechanics are currently unknown, and the biomechanical advantages of repair have not been measured. We hypothesize that tears to the meniscocapsular junction will cause ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1398656
更新日期：2015-06-01 00:00:00
abstract：:This study assessed tolerance to fluid ingestion with repeated sessions of drinking while running. Runners (n = 7; age 22 +/- 2 yr; V O (2max) = 54.4 +/- 7.1 ml/kg/min) performed six 90-min runs (65 % V O (2max); separated by 7 - 11 days). During run 1, subjects drank a glucose-electrolyte solution AD LIBITUM for 1 mi...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1038620
更新日期：2008-11-01 00:00:00
abstract：:This study was undertaken to assess whether ventilatory anaerobic threshold (T vent) reflected endurance capacity (EC) in sports medical control. Fifteen subjects performed two cycle ergometer tests. The first was a maximal exercise test, which consisted of increasing the load 20 W/min until exhaustion. During this te...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025654
更新日期：1987-06-01 00:00:00
abstract：:Serum concentrations of androgens, cortisol, androgen binding proteins, pituitary hormones, together with anthropometric variables and sports performance were studied in two different elite male ice hockey teams. One of the teams (DIF, n = 22) participated in a special dietary program including reduction in fat from a...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021292
更新日期：1992-07-01 00:00:00
abstract：:Here, we compared the maximal lactate steady state velocity (vMLSS) estimated from a single-visit protocol (v5×2000) to the traditional multi-day protocol (vMLSS). Furthermore, we determined whether there was a lactate steady state during the time limits (Tlim) at vMLSS or v5×2000. Eight runners completed a half marat...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0031-1283178
更新日期：2011-11-01 00:00:00
abstract：:The aim of this study was to evaluate the effect of swimming exercise, without overloading, on the biomechanical parameters of the calcaneal tendon of rats. 27 male Wistar rats (70 days) were distributed randomly into 2 groups, Control Group (CG; n=15) with restricted movements inside the cage and Swimming Group (SG; ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0033-1345130
更新日期：2013-12-01 00:00:00
abstract：:The effects of muscle temperature on the development of muscular power are discussed. Temperature influences power (both metabolic and mechanical) by means of its effects on the rate of ATP hydrolysis and/or resynthesis. One would therefore expect reduced power outputs at cold muscle temperatures in humans. However, t...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2007-1024634
更新日期：1992-10-01 00:00:00
abstract：:The accumulated O2 deficit (the difference between the estimated energy demand and the actual O2 uptake) was determined during intense exhaustive exercise (2-7 min) in elite athletes, and its relationship with muscle buffer capacity, muscle enzymes and muscle morphology was examined. Five oarsmen, fifteen soccer playe...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021165
更新日期：1993-05-01 00:00:00
abstract：:Intense exercise promotes long-term gains in cognitive functions. On the other hand, intense exercise may result in acute effects not clearly determined for cognitive performance. A condition of stochastic intensity ranging from moderate to maximal efforts is part of sports like cycling, in which cognitive integrity i...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1114-6170
更新日期：2020-06-29 00:00:00
abstract：:Sedentary overweight or obese adult (age<60 years) women, allocated in type 2 diabetes mellitus (T2DM, n=13), dyslipidemia alone (DYS, n=12), dyslipidemia associated with hyperglycaemia (DYSHG, N=12), or healthy control (CON, n=10) groups, had their lipid, glucose, blood pressure, endurance performance, and anthropome...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0044-100387
更新日期：2018-05-01 00:00:00
abstract：:Hypertension is not uncommon in childhood and adolescence; vascular and renal causes predominate. Non-pharmacologic therapy, including exercise, may lower blood pressure (BP). There are several articles relating to the use of exercise as a therapy for high BP. Most of these show a beneficial effect. The "dose" of exer...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2000-8497
更新日期：2000-11-01 00:00:00
abstract：:Stretching of an activated muscle prior to its shortening enhances its performance during the concentric contraction. This phenomenon has been interpreted to be primarily due to the utilization of elastic energy stored in the series elastic elements of the muscle during the stretch. However, reflex potential has also ...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2008-1026076
更新日期：1982-08-01 00:00:00
abstract：:Over 30 years ago hemodynamic studies on patients with high altitude pulmonary edema (HAPE) excluded the prior contention that the basic cause was left ventricular failure and correctly implicated the pulmonary circulation as the culprit. Physiological studies during the acute stage have revealed a normal pulmonary ar...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2007-972589
更新日期：1997-01-01 00:00:00
