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 eccentrically and the non-dominant leg worked concentrically at a rate of 15 cycles/min. The quadriceps isokinetic peak torque and the corresponding peak torque angle at angular velocity of 60 degrees /sec, and muscle soreness were determined at baseline, immediately after, day 1 and day 2 after the exercise protocol. Repeated measures of ANOVA showed no change in the peak torque after the eccentric exercise and concentric exercise (p > 0.05). There was a significant shift in the peak torque angle to longer muscle lengths in the eccentrically-exercised leg immediately (65.6 +/- 2.21 degrees ) and on the following two days after exercise (day 1: 68.3 +/- 2.71 degrees ; day 2: 67.4 +/- 2.51 degrees ) when compared with baseline (61.4 +/- 1.55 degrees , p < 0.05). These features were not observed in the concentrically-exercised leg. Eccentric exercise produced a higher level of soreness than concentric exercise at day 1 and 2 after the protocol. Submaximal eccentric exercise could bring about changes in the muscle properties resulting in a shift in the angle-torque relationship to longer muscle length without significant force deficit.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Yeung SS,Yeung EWdoi
10.1055/s-2007-965337subject
Has Abstractpub_date
2008-03-01 00:00:00pages
251-6issue
3eissn
0172-4622issn
1439-3964journal_volume
29pub_type
杂志文章abstract：:Within a 3-year period, from 1980 to 1982, 1124 sports injuries of children aged 6-15 years were treated in the Turku University Central Hospital casualty department. Two-thirds (69%) of the injuries were sustained by boys. Sports injuries represented 21% of the diagnoses related to accidents in this age group. Half o...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1024879
更新日期：1989-04-01 00:00:00
abstract：:We investigated the early effects of whole body vibration (WBV) added to hypocaloric diet on insulin-resistance and other parameters associated with glucose regulation in sedentary obese individuals. We randomly assigned 34 patients to WBV plus hypocaloric diet (WBV group) or diet alone (CON group) for 8 weeks. Fastin...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0033-1354358
更新日期：2014-06-01 00:00:00
abstract：:The purpose of this study was to examine whether mental fatigue influences the perceived effort required to complete fairly light and hard effort self-paced exercise challenges. 12 participants completed 2 trials in a randomised cross-over design. Each participant was required to complete a time-matched pre-exercise t...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0033-1343402
更新日期：2013-12-01 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
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1055/s-2007-972968
更新日期：1995-02-01 00:00:00
abstract：:Thirty-three untrained subjects of both sexes, 18-31 years of age, performed several tests on cycle ergometers. Maximal aerobic power (MAP) was obtained in a progressive work test. Maximal aerobic capacity (MAC) was measured in a 90-min maximal test and was computed as the total work output during that period. Two all...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025864
更新日期：1985-12-01 00:00:00
abstract：:Duplicate haemoglobin mass (Hbmass) measurements are recommended before and after altitude training sojourns to identify individual adaptations in athletes with a high level of certainty. Duplicate measurements reduce typical error (TE) and disclose measurement outliers, but are usually made on separate days, which is...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1398583
更新日期：2015-05-01 00:00:00
abstract：:Fitness, and specifically body composition of football referees requires attention in order to achieve the highest possible standards. The aim of the present study was to describe body composition of elite Spanish football referees over 11 years. Data from 2001 to 2012 pre-seasons were analyzed from a total of 470 ref...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1398582
更新日期：2015-06-01 00:00:00
abstract：:This study was a retrospective examination of the relationship between estimated dietary sodium intake and training-induced changes in plasma volume (PV). It was undertaken to explore one possible explanation for the large individual differences in PV shifts accompanying 3 d of endurance cycling. Ten healthy males rod...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-973033
更新日期：1995-10-01 00:00:00
abstract：:The effects of physical activity (PA) on bioenergetic characteristics were studied in 53 prepubertal boys. Maximal oxygen consumption (VO2max; direct method), maximal anaerobic power (Pmax, force-velocity test), and mean power in 30 s (P30s, Wingate test) were compared (mean +/- SD) in three groups of boys of the same...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021208
更新日期：1993-11-01 00:00:00
abstract：:The purpose of this study was to determine whether a player's physical impairment or activity profile was related to the amount of thermal strain experienced during wheelchair rugby match play. 17 elite wheelchair rugby players played a competitive match, whilst activity profiles, measures of core and skin temperature...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0042-121263
更新日期：2017-03-01 00:00:00
abstract：:Forty-six male wheelchair basketball players performed a set of field tests to evaluate aerobic capacity (25 m shuttle run), anaerobic capacity (30s sprint), and six specific wheelchair basketball skills. Overall test-retest reliability (n = 20) ranged from r = 0.65 to r = 0.97. To study the validity (criterion relate...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-1999-9465
更新日期：1999-11-01 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
pub_type： 临床试验,杂志文章
doi：10.1055/s-2007-972863
更新日期：1996-07-01 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
pub_type： 杂志文章
doi：10.1055/s-0034-1398528
更新日期：2015-06-01 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
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0031-1283175
更新日期：2011-12-01 00:00:00
abstract：:The purpose of the present study was to ascertain whether increase in step frequency at a given velocity during running reduces the lower extremity loading variables, which is associated with tibial stress fracture in runner. We hypothesized that the lower extremity loading variables at a given speed would be minimize...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0031-1291232
更新日期：2012-04-01 00:00:00
abstract：:Recompression during decompression has been suggested to possibly reduce the risk of decompression sickness (DCS). The main objective of the current study was to investigate the effects of FLIRT (First Line Intermittent Recompression Technique) on bubble detection in man. 29 divers underwent 2 simulated dives in a dry...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0032-1306328
更新日期：2012-11-01 00:00:00
abstract：:This study aimed to investigate how the trunk muscularity is related to sprint running performance. In 23 youth soccer players, the cross-sectional images at the mid level of each of L1-L2, L2-L3, L3-L4, L4-L5, and L5-S1 were obtained using magnetic resonance imaging to determine the cross-sectional areas (CSAs) of re...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0030-1268502
更新日期：2011-03-01 00:00:00
abstract：:We investigated the protective effect of Erythropoietin (EPO) analogue rHuEPO on renal injury induced by acute exhaustive exercise in the rat. Rats were randomly allocated to one of 3 groups: normal control (C), exhaustive exercise test (ET) and EPO pre-treatment (rHuEPO 2 000 U/kg) plus ET (EPO+ET). Compared with con...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0030-1265205
更新日期：2010-12-01 00:00:00
abstract：:The stress of strenuous long-term exercise may alter renal function. Whether this is also true for marathon cycling is unknown so far. The purpose of this study was to evaluate renal function following competitive marathon cycling. We investigated 38-male, well-trained recreational cyclists credibly not taking any kin...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2003-38205
更新日期：2003-02-01 00:00:00
abstract：:The aim of this study was to establish the presence of postural deficits in subjects with chronic ankle instability (CAI) and to assess the effect of an 8-week balance training program on dynamic postural control. A total of 43 subjects with CAI and 31 controls participated in this case-control study. Participants wit...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1396823
更新日期：2015-06-01 00:00:00
abstract：:Muscular deficits in the hip abductors are presumed to be a major factor in the development of Iliotibial Band Syndrome in runners. No definite relationship between muscular weakness of the hip abductors and the development of Iliotibial Band Syndrome or different ratios between hip adduction to abduction have been re...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-989323
更新日期：2008-07-01 00:00:00
abstract：:The effect of recovery duration on performance and fatigue pattern during short exercises was studied including and excluding the flywheel inertia. Subjects (11 males and 11 females) performed a force-velocity test to determine their optimal force (f (opt)). On the following day, subjects performed randomly 4 series o...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2003-45262
更新日期：2004-04-01 00:00:00
abstract：:Recreational scuba diving is a sport of increasing popularity. Previous studies indicating subtle brain injury in asymptomatic divers imply a cumulative effect of minor neural insults in association with diving for professional and/or recreational purposes, over the long-term. This is the first study to investigate pu...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0031-1284341
更新日期：2011-12-01 00:00:00
abstract：:The six-minute walk test (6MWT) is an inexpensive, quick and safe tool to evaluate the functional capacity of patients with heart failure and chronic obstructive pulmonary disease. The aim of this study was to determine the reproducibility of the 6MWT in overweight and obese individuals. We thus undertook a prospectiv...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0029-1231043
更新日期：2009-10-01 00:00:00
abstract：:The purpose of this study was to examine electromyographic changes of the agonist and antagonist muscles during fatigue. Nine healthy, untrained subjects exerted a maximum voluntary heel lifting contraction with their dominant limb. The EMG activity over the soleus and the tibialis anterior muscles was recorded during...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2002-29079
更新日期：2002-05-01 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
pub_type： 杂志文章
doi：10.1055/s-0034-1372639
更新日期：2014-12-01 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：:The optimal exercise modality for the improvement of health-related parameters and microvascular function in obese adolescents is not yet fully understood. Therefore, this study aimed to 1) compare the microvascular phenotype of obese and normal-weight adolescents; and 2) to determine the effects of a lifestyle interv...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-0577-4280
更新日期：2018-06-01 00:00:00
abstract：:Dietary intake, plasma lipids, lipoprotein and apolipoprotein levels, anthropometric measurements and anaerobic performance were studied in eleven judo athletes during a period of weight maintenance (T1) and after a 7d food restriction (T2). Dietary data were collected using a 7-day diet record. Nutrient analysis indi...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2001-16244
更新日期：2001-08-01 00:00:00
abstract：:Throwing arm injuries are common and often related to the shoulder external and internal rotation. Quantitative assessment may provide new insights to physical assessment and options for treatment. After having signed IRB approved consents and filled out injury questionnaires, 96 baseball pitchers were examined on bot...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0031-1295440
更新日期：2012-06-01 00:00:00
