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 cartilage deformation was also computed. Microspectrophotometric and polarized light microscopic analyses were made for determination of local glycosaminoglycan content and collagen organization, respectively. During a period of one year, the runner dogs (n = 10) underwent a gradually increased treadmill exercise up to 40 km/day, while the littermate control dogs (n = 10) lived normally in their cages. The equilibrium shear modulus of articular cartilage decreased significantly by 12 to 14% (p < 0.05) in the lateral, but not in the medial, condyles of femur and tibia. In the lateral condyles of the runner dogs, the deformation rate of cartilage increased by 16% (p < 0.05). Consequently, the articular cartilage response to running training was site-dependent. The simultaneous changes of the equilibrium shear modulus or the retardation time spectrum and the glycosaminoglycan content confirm the key role of proteoglycans in modulating the cartilage equilibrium stiffness and creep rate. The changes in the instant shear modulus appeared to be predominantly related to the alterations in the organization of the superficial collagen network. Although the running training did not create cartilage damage, we assume that the softening of the cartilage may with time jeopardize the ability of articular cartilage to maintain its normal structural and functional properties.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Arokoski J,Jurvelin J,Kiviranta I,Tammi M,Helminen HJdoi
10.1055/s-2007-1021056subject
Has Abstractpub_date
1994-07-01 00:00:00pages
254-60issue
5eissn
0172-4622issn
1439-3964journal_volume
15pub_type
杂志文章abstract：:Blood pressure (BP) assessment during resistance exercise can be useful to avoid high BP, reducing cardiovascular risk, especially in hypertensive individuals. However, non-invasive accurate technique for this purpose is not available. The aim of this study was to compare finger photoplethysmographic (FPP) and intra-a...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0030-1252054
更新日期：2010-08-01 00:00:00
abstract：:The hind limbs of mice were immobilized with plaster cast for different periods of time, and the atrophy of the anterior tibial muscle was examined by measuring fiber cross sections. In a second series of experiments, mice were trained on a treadmill before and after immobilization. The most pronounced decrease in fib...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025726
更新日期：1986-02-01 00:00:00
abstract：:The objective of the study is to describe two cases of proximal tibiofibular ganglion cysts in high level athletes. In May 2003 and March 2005 two athletes (one tennis player in the top eighty of the Italian national ranking and a gymnast belonging to the Italian rhythmic gymnastics national team) were referred to our...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-989440
更新日期：2008-08-01 00:00:00
abstract：:Participation in aerobic dance is associated with a number of lower extremity injuries, and abnormal joint loading seems to be a factor in these. However, information on joint loading is limited. The purpose of this study was to investigate the kinetics of the lower extremity in step aerobic dance and to compare the d...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0032-1311649
更新日期：2012-11-01 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：:This study was designed to evaluate recovery of dynamic muscle function following muscle fatigue produced by isokinetic testing. Sixteen physically active males (age = 29.2) performed fatigue and recovery tests on an isokinetic dynamometer (KIN-COM 500H). The fatigue test involved concentric contractions of the quadri...
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-2007-972989
更新日期：1995-04-01 00:00:00
abstract：:The aim of this study was to compare heart rate variability (HRV) recovery after two iso-volume (5 km) exercises performed at different intensities. 14 subjects volunteered (25.17±5.08 years; 74.7±6.28 kg; 175±0.05 cm; 59.56±5.15 mL·kg(-1)·min(-1)) and after determination of peak oxygen uptake (VO2Peak) and the speed ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0042-100292
更新日期：2016-06-01 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 main purpose of the present study was to compare the reference metabolic equivalent (MET) value and observed resting oxygen uptake (VO2) for defining cardiorespiratory fitness (VO2max) and characterizing the energy cost of treadmill running. A heterogeneous cohort of 114 healthy men volunteered to participate. In ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0043-115739
更新日期：2017-11-01 00:00:00
abstract：:The effect of 60 h without sleep upon maximal oxygen intake was examined in 12 young women, using a cycle ergometer protocol. The arousal of the subjects was maintained by requiring the performance of a sequence of cognitive tasks throughout the experimental period. Well-defined oxygen intake plateaus were obtained bo...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1024936
更新日期：1989-12-01 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：:Changes in body components occur over a season, but their impact on performance is still unclear. We aimed to analyze the relationship between changes in leg strength and jump performance with body composition over a season in highly trained athletes. Measures from the beginning to the main competitive periods of a se...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1371839
更新日期：2014-12-01 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
abstract：:The use of 60%-95% of maximal heart rate (HR), heart rate reserve (HRR) and VO2max as exercise training intensities was examined in male runners, and these intensities were related to VO2 observed at the lactate threshold (LT) and fixed blood lactate concentrations (FBLC) of 2.0, 2.5, and 4.0 mM. Thirty-one subjects (...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1024795
更新日期：1990-06-01 00:00:00
abstract：:Prevalence of Achilles tendinopathy increases with age leading to a weaker tendon with predisposition to rupture. Conclusive evidence of the influence of age and pathology on Achilles tendon (AT) properties remains limited, as previous studies are based on standardized isometric conditions. The study investigates the ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0042-108198
更新日期：2016-11-01 00:00:00
abstract：:The anaerobic threshold (AnT) seems to be not only a physiologic boundary but also a transition after which swimmers technique changes, modifying their biomechanical behaviour. We expanded the AnT concept to a biophysical construct in the four conventional swimming techniques. Seventy-two elite swimmers performed a 5×...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-0975-9532
更新日期：2020-05-01 00:00:00
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 pr...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972801
更新日期：1996-01-01 00:00:00
abstract：:The purpose of this study was to establish the validity of a 90-s all-out test for the estimation of maximal oxygen uptake (V.O (2max)) and submaximal aerobic ability as represented by critical power. We hypothesized that the fall in power output by the end of the 90-s all-out test (end power) would represent the exha...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2006-924513
更新日期：2007-05-01 00:00:00
abstract：:The aim of this study was to examine the effect of defensive pressure on movement behaviour during an under-18 basketball game. 20 international male players (age: M=16.05, SD=2.09 years old; weekly practice: M=10.9, SD=1.94 h; playing experience: M=7.1, SD=1.1 years) played two 10-min basketball quarters, using man-t...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0033-1363237
更新日期：2014-08-01 00:00:00
abstract：:This study was undertaken to determine which of the two commonly used field tests, the 20-meter shuttle run test (20-MST) or the University of Montreal track test (UM-TT), provides the most accurate assessment of maximal and functional aerobic capacity in moderately trained athletes. Eleven male subjects aged from 18 ...
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-2007-1021261
更新日期：1992-04-01 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
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0034-1394394
更新日期：2015-04-01 00:00:00
abstract：:We have studied the effect of exercise on the percentage of free plasma estradiol 17-beta (E2) and testosterone (T) in 13 untrained (UT) and 8 trained (marathon runners, MR) eumenorrheic women. All women performed a standardized bicycle ergometer (UT) or treadmill (MR) test in the follicular and luteal phases of their...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025721
更新日期：1987-12-01 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：:The aim of this study was to compare hormonal changes in plasma total testosterone (T), cortisol (C), luteinizing hormone (LH), follicle-stimulating hormone (FSH) and prolactin (P) in two world-class teams, both consisting of 9 top male pro-cyclists, during a real sports situation (the 1998 "Vuelta a España", a 3-week...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2002-35532
更新日期：2002-11-01 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：:Excessive and prolonged exposure to impact acceleration during running is associated with increased injury rate. Acute use of compressive garments has been speculated to improve attenuation. However, it is unknown how longer interventions of compressive garments influence attenuation in running. 40 runners trained wit...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0035-1548813
更新日期：2015-10-01 00:00:00
abstract：:Biomechanical parameters are often analyzed independently, although running gait is a dynamic system wherein changes in one parameter are likely to affect another. Accordingly, the Volodalen® method provides a model for classifying running patterns into 2 categories, aerial and terrestrial, using a global subjective r...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0035-1555931
更新日期：2016-01-01 00:00:00
abstract：:Three different procedures to analyse fencing performances were tested. The test subjects were ten world class epée fencers from the Swedish national team. The procedures involved measurements of reaction time and response time to different stimuli. Test 1 measured the lunging performance as a response to a light. Tes...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1024736
更新日期：1991-12-01 00:00:00
abstract：:Prolonged altitude exposure usually leads to considerable weight loss of which a large part is from muscle tissue. This loss reduces maximum alactic anaerobic muscle power. It was hypothesized that most of the weight loss may simply be the result of malnutrition due to lack of palatable food in an uncomfortable enviro...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021171
更新日期：1993-07-01 00:00:00
abstract：:Exercise induced proteinuria is a common phenomenon in high performance sports. Based on the appearance of so called "effort urines" in routine doping analysis the purpose of this study was to investigate the influence of exercise induced proteinuria on IEF profiles and SDS-PAGE relative mobility values (rMVs) of endo...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0030-1249083
更新日期：2010-06-01 00:00:00
