Plasma volume during weight lifting.

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

authors： Bosco C,Tarkka I,Komi PV

更新日期：1982-08-01 00:00:00

abstract：:The aim of the present study was to understand if sport improves attention symptoms, social competency, and cognitive functions in children with attention deficit and hyperactivity disorder (ADHD). The present study was designed as a 6-week, prospective trial, including 12 sessions of education/sports therapy. 13 ADHD...

journal_title：International journal of sports medicine

authors： Kang KD,Choi JW,Kang SG,Han DH

更新日期：2011-12-01 00:00:00

abstract：:Sprint cycling performance is heavily dependent on mechanical peak power output (PPO) and the underlying power- and torque-cadence relationships. Other key indices of these relationships include maximum torque (TMAX), cadence (CMAX) and optimal cadence (COPT). Two common methods are used in the laboratory to ascertain...

journal_title：International journal of sports medicine

authors： Kordi M,Folland J,Goodall S,Barratt P,Howatson G

更新日期：2019-12-01 00:00:00

abstract：:The availability of O2 in the human vastus lateralis muscle has been investigated with non-invasive near-infrared spectroscopy (NIRS) using a commercially available unit (RunMan, NIM Inc. Philadelphia). The measuring probe placed above the skin illuminates the underlying tissue and measures the reflected light at two ...

journal_title：International journal of sports medicine

authors： Sahlin K

更新日期：1992-10-01 00:00:00

abstract：:While phosphorous magnetic resonance spectroscopy ((31)P-MRS) and near-infrared spectroscopy (NIRS) provide methods for measuring spinal muscle function non-invasively, their reliability is not established. The aim of this study was assess the reliability (ICC) and error magnitude (CV%) of measurements of muscle phosp...

journal_title：International journal of sports medicine

authors： Fulford J,Liepa A,Barker AR,Meakin J

更新日期：2014-12-01 00:00:00

abstract：:To study the effects of long-term, home-based exercise on physical fitness and cardiovascular risk factors of middle-aged nonsmoking males, a controlled study was conducted in 61 sedentary Swiss men. Thirty-nine men were randomly allocated to jog 2 h/week for 4 months on an individually prescribed and heart-rate-contr...

journal_title：International journal of sports medicine

authors： Suter E,Marti B,Tschopp A,Wanner HU,Wenk C,Gutzwiller F

更新日期：1990-12-01 00:00:00

abstract：:The aim of the present study was to analyze the effects of age on cardiorespiratory fitness (CRF), muscle strength and heart rate (HR) response to exercise adaptation in women in response to a long-term twice-weekly combined aerobic and resistance exercise program. 85 sedentary women, divided into young (YG; n=22, 30....

journal_title：International journal of sports medicine

authors： Ciolac EG,Roberts CK,da Silva JM,Guimarães GV

更新日期：2014-05-01 00:00:00

abstract：:The goal of this study was to examine the hypothesis that the difference in the 200-m sprint performance of amputee and able-bodied sprinters is due to a shorter step length rather than a lower step frequency. Men's elite-level 200-m races with a total of 16 able-bodied, 13 unilateral transtibial, 5 bilateral transtib...

journal_title：International journal of sports medicine

authors： Hobara H,Sano Y,Kobayashi Y,Heldoorn TA,Mochimaru M

更新日期：2016-02-01 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

authors： Komulainen J,Kalliokoski R,Koskinen SO,Drost MR,Kuipers H,Hesselink MK

更新日期：2000-02-01 00:00:00

abstract：:The objective of our study was to evaluate the effect of taping on the dynamic postural stability during a jump landing protocol in subjects with chronic ankle instability (CAI). For this purpose, 28 subjects with CAI performed a sagittal and frontal plane landing task in a non-taped and taped condition. As main outco...

journal_title：International journal of sports medicine

authors： De Ridder R,Willems TM,Vanrenterghem J,Roosen P

更新日期：2015-04-01 00:00:00

abstract：:This study examined the validity of 2 kinematic systems for estimating force and power during squat jumps. 12 weight-trained males each performed single repetition squat jumps with a 20-kg, 40-kg, 60-kg and 80-kg load on a Kistler portable force plate. A commercial linear position transducer (Gymaware [GYM]) and accel...

journal_title：International journal of sports medicine

authors： Crewther BT,Kilduff LP,Cunningham DJ,Cook C,Owen N,Yang GZ

更新日期：2011-04-01 00:00:00

abstract：:Fourteen male physical education students performed a single bout of running until exhaustion on the treadmill at 22 km/h and 7.5% slope. They received single oral doses of 100 mg bupranolol (nonselective beta-blockade), 100 mg metoprolol (beta-1-selective blockade), and placebo 60-90 min before running. Arterialized ...

journal_title：International journal of sports medicine

authors： Schnabel A,Kindermann W,Salas-Fraire O,Cassens J,Steinkraus V

更新日期：1983-11-01 00:00:00

abstract：:This study was designed to compare the effects of three prolonged exercises varying in their intensity and duration, on blood mononuclear cell mobilization and cytokine secretion (IL1(1)-IL(2)). Seven healthy subjects underwent three effort trials (45 % VO(2)max during 4 h - 60% VO(2)max during 3 h - 75 % VO(2)max dur...

journal_title：International journal of sports medicine

authors： Bury TB,Louis R,Radermecker MF,Pirnay F

更新日期：1996-02-01 00:00:00

abstract：:Rugby union is a sport involving high force and frequency impacts making the likelihood of injury a significant risk. The aim of this study was to measure and report the individual and group acute and cumulative physiological stress response during 3 professional rugby games through non-invasive sampling. 24 professio...

journal_title：International journal of sports medicine

authors： Lindsay A,Lewis JG,Scarrott C,Gill N,Gieseg SP,Draper N

更新日期：2015-06-01 00:00:00

abstract：:Twenty-six male runners aged 14-16 years not yet specifically trained for sprint or middle-distance running performed a field test with distances of 25 m, 75 m, and 1000 m. Before the field test they were designated as sprinters (n = 19) and middle-distance runners (n = 7) according to their self-assessment and the es...

journal_title：International journal of sports medicine

authors： Hageloch W,Schneider S,Weicker H

更新日期：1990-05-01 00:00:00

abstract：:Amenorrhea and osteoporosis are strongly associated in female athletes. Amenorrheic women show lower serum levels of brain-derived neurotrophic factor (BDNF) than eumenorrheic women. BDNF is known to regulate bone tissue development and remodeling; thus, athletes with low serum BDNF levels may show low bone mass. This...

journal_title：International journal of sports medicine

authors： Nose S,Yoshino O,Nomoto K,Harada M,Dohi M,Kawahara T,Osuga Y,Fujii T,Saito S

更新日期：2019-04-01 00:00:00

abstract：:Circulating progenitor cells (CPC) are bone marrow-derived cells that are mobilized into the circulation. While exercise is a powerful mediator of hematopoiesis, CPC levels increase, and reports of their activation after different types of exercise are contradictory. Moreover, few studies have compared the possible ef...

journal_title：International journal of sports medicine

authors： Niño O,Balague N,Aragones D,Blasi J,Alamo JM,Corral L,Javierre C,Miguel M,Viscor G,Ventura JL

更新日期：2015-04-01 00:00:00

abstract：:The present study examined the neuromuscular activation characteristics of the hamstrings during the 'Nordic' hamstrings exercise (NHE) and changes in the eccentric strength of the knee flexors with NHE training. Initially, the normalised root mean square electromyographic (EMG) activity of the hamstrings of both limb...

journal_title：International journal of sports medicine

authors： Iga J,Fruer CS,Deighan M,Croix MD,James DV

更新日期：2012-12-01 00:00:00

abstract：:The purpose of this study was to: (1) verify the aerobic requirement (AR) of bench stepping (BS); (2) determine the effect of leg length (LL), bench height (BH), stepping rate (SR), body weight (BW), and fat free mass (FFM) on the AR of BS; and (3) compare the HR and VO2 of BS with treadmill walking/running (TM). Twen...

journal_title：International journal of sports medicine

authors： Stanforth D,Stanforth PR,Velasquez KS

更新日期：1993-04-01 00:00:00

abstract：:Male Sprague-Dawley rats (n = 48, > 200 g) were progressively treadmill trained over 5 wk where they were running 60 min/d, 5 d/wk. One-half of the group consumed a high-fat diet (HF, 78.7% of energy), while one-half consumed a high-carbohydrate diet (HC, 68.7% of energy). On the day of the experiment, 6 rats per diet...

journal_title：International journal of sports medicine

authors： Nakamura M,Brown J,Miller WC

更新日期：1998-08-01 00:00:00

abstract：:The aim of this study was to examine the relationship between anthropometry, physical capacity, and sprint swimming performance in swimmers of both genders aged 12 - 14 years old. Anthropometric characteristics (body height and mass, total upper extremity, hand and foot lengths, chest circumference, certain body bread...

journal_title：International journal of sports medicine

authors： Geladas ND,Nassis GP,Pavlicevic S

更新日期：2005-03-01 00:00:00

abstract：:This study aims to investigate the changes in the mechanical properties of quadriceps muscle following a sub-maximal concentric-eccentric stepping exercise protocol. Twenty-four untrained healthy subjects aged 21.9 +/- 0.55 years were asked to perform a 10-minute stepping exercise where the dominant leg worked eccentr...

journal_title：International journal of sports medicine

authors： Yeung SS,Yeung EW

更新日期：2008-03-01 00:00:00

abstract：:The present study was designed to evaluate the influence of starch structure on muscle glycogen resynthesis and cycling performance. Eight male cyclists (22 +/- 1 yr) completed an exercise protocol (DP) to decrease vastus lateralis glycogen concentration. This exercise consisted of 60 min cycling at 75% VO2max, follow...

journal_title：International journal of sports medicine

authors： Jozsi AC,Trappe TA,Starling RD,Goodpaster B,Trappe SW,Fink WJ,Costill DL

更新日期：1996-07-01 00:00:00

abstract：:Electromyographic and force production characteristics of leg extensor muscles of elite weight lifters (n = 14) were examined during isometric, concentric, and various stretch-shortening cycle exercises. The data showed that utilization of stored elastic energy of leg extensor muscles was observable in countermovement...

journal_title：International journal of sports medicine

authors： Häkkinen K,Komi PV,Kauhanen H

更新日期：1986-06-01 00:00:00

abstract：:The effects of two 4-week training programs on knee flexor and extensor strength were measured isokinetically (angular velocity 30 degrees, 180 degrees/s) and isometrically in division IV soccer players. Group A followed a team training program and group B an individual weight training program. Group C served as contr...

journal_title：International journal of sports medicine

authors： Oberg BE,Möller MH,Ekstrand J,Gillquist J

更新日期：1985-06-01 00:00:00

abstract：:Haemostasis has been studied by several authors during exposure to altitude hypoxia. On acute induction to hypoxia, platelet count, platelet aggregability and bleeding time are normal; an increase of thromboxane released from platelets and of prostacyclin, released from endothelial cells is observed; coagulation facto...

journal_title：International journal of sports medicine

authors： Le Roux G,Larmignat P,Marchal M,Richalet JP

更新日期：1992-10-01 00:00:00

abstract：:We studied 12 highly trained athletes, 6 male ice-hockey players and 6 cross-country skiers (2 females, 4 males). All of them participated in a maximal electrically braked bicycle ergometer test in a hypobaric chamber at the simulated altitude of 3000m (520 mmHg) and in normobaric conditions two days apart in random o...

journal_title：International journal of sports medicine

authors： Koistinen P,Takala T,Martikkala V,Leppäluoto J

更新日期：1995-02-01 00:00:00

abstract：:To investigate the effect of a transition program of simulated barefoot running (SBR) on running kinematics and foot-strike patterns, female recreational athletes (n=9, age 29 ± 3 yrs) without SBR experience gradually increased running distance in Vibram FiveFingers SBR footwear over 12 weeks. Matched controls (n=10, ...

journal_title：International journal of sports medicine

authors： McCarthy C,Fleming N,Donne B,Blanksby B

更新日期：2014-05-01 00:00:00

abstract：:The possible peripheral and/or central origin in the mechanisms responsible for day-time fluctuation in maximal torque of the triceps surae muscle were investigated with a special emphasis on antagonist muscle coactivation. Eleven healthy male subjects (physical education students) took part in this investigation. The...

journal_title：International journal of sports medicine

authors： Guette M,Gondin J,Martin A,Pérot C,Van Hoecke J

更新日期：2006-03-01 00:00:00

abstract：:The aim of this study was to evaluate whether endurance athletes who exhibit deep bradycardia are more prone to arrhythmias and reflex syncope than their non-bradycardic peers. 46 healthy men (ages 19-35) were divided into 3 groups based on whether they were sedentary (SED,<2 h/week) or endurance trained (ET,>6 h/week...

journal_title：International journal of sports medicine

authors： Matelot D,Schnell F,Khodor N,Endjah N,Kervio G,Carrault G,Thillaye du Boullay N,Carre F

更新日期：2016-09-01 00:00:00