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, age 30 ± 4 yrs) continued running in standard footwear. A 3-D motion analysis of treadmill running at 12 km/h(-1) was performed by both groups, barefoot and shod, pre- and post-intervention. Post-intervention data indicated a more-forefoot strike pattern in the SBR group compared to controls; both running barefoot (P>0.05), and shod (P<0.001). When assessed barefoot, there were significant kinematic differences across time in the SBR group for ankle flexion angle at toe-off (P<0.01). When assessed shod, significant kinematic changes occurred across time, for ankle flexion angles at foot-strike (P<0.001) and toe-off (P<0.01), and for range of motion (ROM) in the absorptive phase of stance (P<0.01). A knee effect was recorded in the SBR group for flexion ROM in the absorptive phase of stance (P<0.05). No significant changes occurred in controls. Therefore, a 12-week transition program in SBR could assist athletes seeking a more-forefoot strike pattern and "barefoot" kinematics, regardless of preferred footwear.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
McCarthy C,Fleming N,Donne B,Blanksby Bdoi
10.1055/s-0033-1353215subject
Has Abstractpub_date
2014-05-01 00:00:00pages
443-50issue
5eissn
0172-4622issn
1439-3964journal_volume
35pub_type
杂志文章abstract::We tested the hypothesis that the initial heart rate (HR) response at the onset of maximal handgrip contraction is altered after training. 17 volunteers (nine trained and eight controls) performed ten intermittent static handgrip contractions with maximal effort, alternating between 15-s contractions and 15-s pauses. ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-989373
更新日期:2008-08-01 00:00:00
abstract::The aims of the study were to investigate the presence of a relative age effect and the influence of birth quarter on anthropometric characteristics, an estimation of biological maturity and performance in the Yo-Yo Intermittent Recovery Test level 1 in 606 elite, Flemish youth soccer players. The sample was divided i...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0032-1311654
更新日期:2012-12-01 00:00:00
abstract::The purpose of this study was to investigate the effects of recombinant human erythropoietin (rHuEPO) administration on energy metabolism during exercise. Specifically, the contribution of anaerobic (glycogen) metabolism during exercise was evaluated. Sprague-Dawley rats were randomly assigned to an experimental [rHuE...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-971919
更新日期:1998-05-01 00:00:00
abstract::In a study of the effects of motion load on weight-bearing articular cartilage, rabbits were made to run on a treadmill for 1-, 5-, and 30-day periods. One group ran on a level surface, and another ran uphill. In vivo 35S-sulfate bound in glycosaminoglycans (GAG) after running was used as an indicator of the synthesis...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025925
更新日期:1984-12-01 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
pub_type: 杂志文章
doi:10.1055/s-0033-1351332
更新日期:2014-05-01 00:00:00
abstract::Climbing Mount Everest needs an acclimatization period of 3 to 4 weeks between 3000 and 6000 m. In order to reduce this period of time spent in dangerous conditions, an experience of pre-acclimatization was performed with 5 elite alpinists (4 male, 1 female), aged 30 +/- 4 yrs (mean +/- SD), before their attempt to cl...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024644
更新日期:1992-10-01 00:00:00
abstract::The aim of the present study was to compare the iron status of 19 top-level soccer players and 20 male control subjects. All players showed no impairment of physical performance and had a dietary iron intake adequate to cover the iron losses. Serum iron, TIBC, % transferrin saturation and serum ferritin were not signi...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024712
更新日期:1991-10-01 00:00:00
abstract::Sports influence the hypothalamus-pituitary-gonadal axis (HPG). The purpose of this study was to analyze the effects of physical stress on qualitative male LH secretion. We evaluated the HPG axis at rest and the LH response to a treadmill exercise (90 % of Vdot;O 2 max) in eight trained (running 50 to 70 km/week) and ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2002-33149
更新日期:2002-07-01 00:00:00
abstract::Hemoglobin oxygen binding properties and acid-base status were investigated in Colombian athletes (A) and controls (C) from Cali (C-1000 m) and Bogotá (B-2600 m). [Hb] and Hct values were not influenced by altitude, but Hct was lower in the blood of athletes (in Cali 2.6%, in Bogotá 1.4%). Both training and altitude p...
journal_title:International journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1055/s-2007-1024755
更新日期:1990-02-01 00:00:00
abstract::Eighteen male marathon runners (mean marathon performance: 2 h 36 min, SD = 7.0 min; VO2 max = 64.1 +/- 15.1 ml/kg . min-1) were submitted to a needle biopsy in the suprailiac region and to various measurements of body fatness: percent body fat (% fat), seven skinfold thicknesses, and mean fat cell diameter. Basal and...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025853
更新日期:1985-10-01 00:00:00
abstract::Understanding the etiology of factors influencing bone mineral density (BMD) in Hispanic women for the prevention of osteoporosis was the aim of this investigation. Whole body BMD (WBBMD) of 39 Hispanic, premenopausal women aged 22 - 51 years was measured using dual-energy X-ray absorptiometry (DXA). Maximal aerobic c...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2004-815839
更新日期:2004-07-01 00:00:00
abstract::The present series of experiments were conducted to access the surface EMG frequency parameters during repeated fingertip isometric contractions to determine if they can be used as a fatigue index under specific grip used in rock climbing. Electromyograms of the finger flexors and extensors were characterised in ten e...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2003-41174
更新日期:2003-08-01 00:00:00
abstract::The aim of the study was to compare the effects of two different models of altering the frequency of strength training sessions of females. The "regular training" (RT) consisted of one training unit every third day over the whole menstrual cycle. The "menstrual cycle triggered training" (MCTT) was characterized by wor...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2007-973052
更新日期:1995-11-01 00:00:00
abstract::Total body water (TBW) and water turnover rates (WTR) of six competitive male cyclists (CG) and six age-matched sedentary men (SG) were determined using deuterium oxide dilution and elimination. During the 7 day study, individuals in the CG cycled daily outside on average 50 (range 12-146) km at an average speed of 29...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2001-15912
更新日期:2001-04-01 00:00:00
abstract::Alpine spelunking is practiced in darkness, isolation, cold and high humidity. In this paper we study the acute haematological effects of prolonged strenuous activity in five spelunkers who spent about 20 hours in a 700-meter deep cave without resting much or sleeping. On four occasions, we measured their red cell cou...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-964978
更新日期:2007-09-01 00:00:00
abstract::Muscle fiber distribution and muscle enzyme activity (m. vastus lat.) were investigated in 10 elite sprint cyclists and 12 nonathletes. The ratio of fast to slow muscle fibers was 2:3 in cyclists and 3:2 in nonathletes. The mean diameter of each muscle fiber type was significantly higher in the athletes. The mean enzy...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025778
更新日期:1986-10-01 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::Leptin, the product of the ob-gene, is specifically released by adipocytes. In addition to its metabolic function it seems to affect the feedback-mechanisms of the hypothalamic-pituitary-gonadal-axis. We studied 13 female juvenile elite gymnasts with anorexia athletica (AA) and 9 female patients with anorexia nervosa ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-1999-8834
更新日期:1999-10-01 00:00:00
abstract::This study examined the relationship between ratings of perceived exertion (RPE, CR-10), heart rate (HR), peak blood lactate (La peak), and immersion (IM) parameters in 17 elite synchronized swimmers performing 30 solo and duet routines during competition. All were video recorded (50 Hz) and an observational instrumen...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0033-1353177
更新日期:2014-05-01 00:00:00
abstract::The purpose of this study was to determine whether a post-exercise cryotherapy protocol could facilitate recovery of elbow flexor strength and reduce the severity of delayed onset muscle soreness following eccentric exercise. Eight resistance-trained males (23 +/- 3 yr) performed 64 eccentric elbow flexions with each ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-972686
更新日期:1997-11-01 00:00:00
abstract::Gait retraining is a method for management of patellofemoral pain, which is a common ailment among recreational runners. The present study investigated the effects of gait retraining from rearfoot strike to forefoot strike on running economy, heart rate, and respiratory exchange ratio immediately post-retraining and o...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0043-110225
更新日期:2017-12-01 00:00:00
abstract::The aim of this study was to test the validity and the reliability of the G-Cog which is a new BMX powermeter allowing for the measurements of the acceleration on X-Y-Z axis (250 Hz) at the BMX rear wheel. These measurements allow computing lateral, angular, linear acceleration, angular, linear velocity and the distan...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0032-1304639
更新日期:2013-11-01 00:00:00
abstract::We hypothesized that a bout of high or low volume eccentric exercise would protect against muscle damage following a subsequent high volume bout and that adaptation would be attributable to neural changes, independent of the initial exercise volume. Sixteen males performed either 45 (ECC45) or 10 (ECC10) maximal eccen...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-964866
更新日期:2007-07-01 00:00:00
abstract::Neuromuscular activity of the lower leg is dependent on the task performed, speed of movement and gender. Whether training volume influences neuromuscular activity is not known. The EMG of physically active persons differing in running mileage was analysed to investigate this. 55 volunteers were allocated to a low (LM...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0031-1286250
更新日期:2012-01-01 00:00:00
abstract::The present study aimed to evaluate the applicability of using a single slice cross-sectional area (CSA) of the skeletal muscle for estimating segmental skeletal muscle volume (SMV). By using MRI, the SMV of each of the upper arm, lower arm, upper leg, lower leg, and trunk was determined in 29 males. First, step-wise ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0033-1351251
更新日期:2014-06-01 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::The purpose was to analyze the influence of oral contraceptive use on body composition and strength levels in trained women. Twenty-three resistance-trained women participated in this study (age=27.4±3.4 years; fat mass=28.0±5.0%; BMI=22.9±2.7 kg∙m-2). Subjects performed an 8-week non-linear resistance-training progra...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/a-0985-4373
更新日期:2019-12-01 00:00:00
abstract::The purpose of this randomized controlled trial was to determine the effects of an 8-week (aerobic+strength) exercise training program (3 sessions/week) on the circulating cytokine levels of breast cancer survivors. We randomly allocated 16 female survivors of breast cancer (mean±SD age: 50±5 years) to an intervention...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0031-1271697
更新日期:2011-06-01 00:00:00
abstract::Muscle biopsies from m. vastus lateralis of two world class shot putters (shot putter 1 and 2) and the untrained brother of shot putter 1 were analyzed for fiber type distribution with ATPase staining and in situ hybridization for the expression of alkali myosin light chain (MLC) isoforms. Shot putter 2 had a predomin...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2003-39092
更新日期:2003-04-01 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