Association Between Match Activity, Endurance Levels and Maturity in Youth Football Players.

abstract：:Although analysis of lactate concentrations with a Yellow Springs Instruments (YSI) automated analyzer has become very popular in Sports Medicine, the accuracy and reliability of this technique has not been carefully studied. Additionally, the influence of a common lysing agent Triton X-100 (TX) on blood lactate measu...

journal_title：International journal of sports medicine

authors： Bishop PA,Smith JF,Kime JC,Mayo JM,Tin YH

更新日期：1992-01-01 00:00:00

abstract：:This study compared physiological responses associated with exercise tolerance in girls (G) and women (W) of similar fitness and heat acclimatization level during exercise in a hot and humid outdoor environment (33.4 degrees C and 55.1 % RH; WBGT = 29.9 +/- 0.2 degrees C). Nine pre-menarcheal G (age = 11.3 yr) and nin...

journal_title：International journal of sports medicine

authors： Rivera-Brown AM,Rowland TW,Ramírez-Marrero FA,Santacana G,Vann A

更新日期：2006-12-01 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：:The postural control of ten male soccer players with functional instability (FI) of the ankle joint, i.e., recurrent sprains and/or a feeling of giving way, was studied before and after ankle disk training. Postural control was studied by means of stabilometry and an optoelectronic movement recording system. In the pr...

journal_title：International journal of sports medicine

authors： Gauffin H,Tropp H,Odenrick P

更新日期：1988-04-01 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

authors： Kayser B,Narici M,Milesi S,Grassi B,Cerretelli P

更新日期：1993-07-01 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

authors： Resina A,Gatteschi L,Giamberardino MA,Imreh F,Rubenni MG,Vecchiet L

更新日期：1991-10-01 00:00:00

abstract：:Female runners are reported to be more prone to develop specific knee joint injuries than males. It has been suggested that increased frontal plane joint loading might be related to the incidence of these knee injuries in running. The purpose of this study was to evaluate if frontal plane knee and hip joint kinematics...

journal_title：International journal of sports medicine

authors： Gehring D,Mornieux G,Fleischmann J,Gollhofer A

更新日期：2014-02-01 00:00:00

abstract：:Exercise induced pain in the posterior part of the leg is common among runners; the underlying reason for these complaints may be very different. The purpose of the present, controlled study was therefore 1. to confirm a clinically diagnosed deep posterior compartment syndrome by using intramuscular pressure measureme...

journal_title：International journal of sports medicine

authors： Biedert RM,Marti B

更新日期：1997-07-01 00:00:00

abstract：BACKGROUND:The purpose of this study was to examine some motor performance aspects of the unloaded lower extremity after Achilles tendon rupture repair. The measured motor performance aspects were simple reaction time, choice reaction time, speed of movement, foot tapping speed, and coordination. METHODS:Ninety patien...

journal_title：International journal of sports medicine

authors： Kauranen KJ,Leppilahti JI

更新日期：2001-02-01 00:00:00

abstract：:Altitude exposure leads to considerable weight loss. The different hypotheses that have been put forward to explain this phenomenon are discussed reviewing the literature: 1) a primary decrease of food intake due to loss of appetite caused, directly or indirectly, by hypoxia, changes of menus, comfort and habits, 2) a...

journal_title：International journal of sports medicine

authors： Kayser B

更新日期：1992-10-01 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

authors： Ferretti G

更新日期：1992-10-01 00:00:00

abstract：:We have studied, on blood samples, the level of immunocompetence (concentration of immune cells, phagocytic process of polymorphonuclear neutrophils, proliferative response of lymphocytes to mitogens), the ascorbic acid content of such immunocompetent cells and the "stress hormone" status (cortisol, ACTH and beta-endo...

journal_title：International journal of sports medicine

authors： Ferrández MD,Maynar M,De la Fuente M

更新日期：1996-11-01 00:00:00

abstract：:Acute aerobic exercise produces post-exercise hypotension (PEH). Chinese populations have lower prevalence of cardiovascular disease compared to Caucasians. PEH may be associated cardiovascular disease through its influence on hypertension. The purpose of this study was to compare PEH between Caucasian and Chinese sub...

journal_title：International journal of sports medicine

authors： Sun P,Yan H,Ranadive SM,Lane AD,Kappus RM,Bunsawat K,Baynard T,Li S,Fernhall B

更新日期：2015-03-01 00:00:00

abstract：:Considerable interindividual variation in the response of blood pressure to exercise has been found. In this study the response of systolic blood pressure during a progressive maximal bicycle ergometer test was investigated in 747 physically active male subjects over age of 40 years with normal, borderline elevated, a...

journal_title：International journal of sports medicine

authors： Wijnen JA,van Baak MA,Tan ES,Bovens AM,Vrencken JG,Verstappen FT

更新日期：1988-12-01 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

authors： Griggs KE,Havenith G,Price MJ,Mason BS,Goosey-Tolfrey VL

更新日期：2017-03-01 00:00:00

abstract：:There are ethical objections to inducing cumulative muscle damage and associated decrements of performance deliberately in a healthy athlete. Available data on acute and chronic over-exertion thus include the changes of immune response observed following a single bout of exhausting exercise, sequential observations ma...

journal_title：International journal of sports medicine

authors： Shephard RJ,Shek PN

更新日期：1998-04-01 00:00:00

abstract：:The aims were both to determine lactate and ventilatory threshold during incremental resistance training and to analyze the acute cardiorespiratory and metabolic responses during constant-load resistance exercise at lactate threshold (LT) intensity. Ten healthy men performed 2 protocols on leg press machine. The incre...

journal_title：International journal of sports medicine

authors： de Sousa NM,Magosso RF,Pereira GB,Souza MV,Vieira A,Marine DA,Perez SE,Baldissera V

更新日期：2012-02-01 00:00:00

abstract：:To examine the influence of acute resistive exercise and "hormone status" on cytokine profile, 35 postmenopausal women (72 +/- 6.2 yr) underwent a moderate-high-intensity resistive exercise bout or rested. There were 4 groups: no hormone replacement (NHR, n = 9), hormone replacement (HRT, n = 12), selective estrogen r...

journal_title：International journal of sports medicine

authors： Phillips MD,Flynn MG,McFarlin BK,Stewart LK,Timmerman KL,Ji H

更新日期：2008-02-01 00:00:00

abstract：:The purpose of this study was to analyse the effects of an exhaustive exercise on arm coordination and intracyclic velocity variations (IVV) to better understand the ways in which they are modified under fatigue conditions. Seventeen competitive swimmers performed a 200-m all-out test and a set of two 25-m (before and...

journal_title：International journal of sports medicine

authors： Alberty M,Sidney M,Huot-Marchand F,Hespel JM,Pelayo P

更新日期：2005-07-01 00:00:00

abstract：:To understand the influence of gender on oxygen consumption of respiratory muscles (VO(2)resp), 32 healthy subjects participated in the study (16 males, 16 females). They were divided into four groups: young males, young females, older males and older females. We used a closed circuit device which allowed a continuous...

journal_title：International journal of sports medicine

authors： Topin N,Mucci P,Hayot M,Prefaut C,Ramonatxo M

更新日期：2003-11-01 00:00:00

abstract：:The ratio between the amount of hemoglobin in the mature erythrocyte population and the reticulocytes (RBCHb:RetHb ratio) has previously been suggested as a marker to screen for EPO-abuse. We speculated that the reinfusion of blood would lead to a marked increase in this ratio, making it a valuable parameter in the sc...

journal_title：International journal of sports medicine

authors： Mørkeberg J,Belhage B,Ashenden M,Bornø A,Sharpe K,Dziegiel MH,Damsgaard R

更新日期：2009-04-01 00:00:00

abstract：:External counterpulsation (ECP), an electrocardiogram-led sequential compression of lower limbs, has been recently proposed for sports recovery, but research is scant. This study examined the effects of an ECP session upon neuromuscular function (vertical jump and torque/velocity characteristics), biochemical response...

journal_title：International journal of sports medicine

authors： Collins R,McGrath D,Horner K,Eusebi S,Ditroilo M

更新日期：2019-08-01 00:00:00

abstract：:The frequency of sister chromatid exchanges (SCE) in the peripheral blood lymphocytes of eighteen healthy old women with 88 style Taichiquan exercise was studied. When compared with eighteen old women without exercise, the training group showed a decreased frequency of SCE in cultured peripheral blood lymphocytes at r...

journal_title：International journal of sports medicine

authors： Sun XH,Xu Y,Xu SQ

更新日期：1990-04-01 00:00:00

abstract：:The objectives of this study were to 1) continuously assess oxygen uptake during and after difficult sport rock climbing and 2) to evaluate the effects of active versus passive recovery on post-climbing blood lactate and hand grip strength. Fifteen expert rock climbers attempted to climb (i.e., red point lead) a 20 m ...

journal_title：International journal of sports medicine

authors： Watts PB,Daggett M,Gallagher P,Wilkins B

更新日期：2000-04-01 00:00:00

abstract：:Prospective studies on overuse injuries and their impact on athletic training among youth team sports are scarce. The purpose of this study was to investigate the incidence, severity and player related risk factors of overuse injuries among young (12-20 years) basketball and floorball players. A total of 387 players p...

journal_title：International journal of sports medicine

authors： Leppänen M,Pasanen K,Kannus P,Vasankari T,Kujala UM,Heinonen A,Parkkari J

更新日期：2017-10-01 00:00:00

abstract：:Studies have shown that the 577R allele of α-actinin-3 (ACTN3) is more prevalent in sprint athletes than in the general population or in endurance athletes. We examined the distribution of ACTN3 R577X (rs 1815739) genotypes and alleles in the Taiwanese general population (603) and in elite sprint swimmers who had part...

journal_title：International journal of sports medicine

authors： Chiu LL,Wu YF,Tang MT,Yu HC,Hsieh LL,Hsieh SS

更新日期：2011-06-01 00:00:00

abstract：:Between the years 1977 and 1984, four javelin throwers with a stress fracture of the olecranon were seen and treated. In one patient, acute painful dislocation of the fracture occurred during a competitive throw. Two patients had stress fracture of the tip. The fracture treated conservatively healed in 18 months. The ...

journal_title：International journal of sports medicine

authors： Hulkko A,Orava S,Nikula P

更新日期：1986-08-01 00:00:00

abstract：UNLABELLED:Caffeine has many diverse physiological effects including central nervous system stimulation. Ventilatory threshold and a recently described heart rate variability threshold both have a relationship with autonomic control that could be altered by caffeine consumption. The purpose of this investigation was to...

journal_title：International journal of sports medicine

authors： Karapetian GK,Engels HJ,Gretebeck KA,Gretebeck RJ

更新日期：2012-07-01 00:00:00

abstract：:The purpose of this randomized cross-over study was to investigate the effects of a 4-min long, 2-mm vertically-vibrating vibration-exercise on muscle performance and body balance in healthy subjects. Sixteen volunteers (eight men and women aged 18-35 years) underwent both the 4-min vibration- and sham-interventions i...

journal_title：International journal of sports medicine

authors： Torvinen S,Sievänen H,Järvinen TA,Pasanen M,Kontulainen S,Kannus P

更新日期：2002-07-01 00:00:00

abstract：:Our purpose was to determine if an acute bout of heading soccer balls adversely affected postural control and self-reported symptoms of cerebral concussion. Thirty-one college-aged soccer players were randomly placed into either a kicking group or a heading group. Subjects either kicked or headed 18 soccer balls over ...

journal_title：International journal of sports medicine

authors： Schmitt DM,Hertel J,Evans TA,Olmsted LC,Putukian M

更新日期：2004-07-01 00:00:00