Effects of a 110 kilometers ultra-marathon race on plasma hormone levels.

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：: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：: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

authors： Reis E,Frick U,Schmidtbleicher D

更新日期：1995-11-01 00:00:00

abstract：:This study investigated the validity of determining the final work rates of cycling and walking ramp-incremented maximal cardiopulmonary exercise tests (CPETs) using a non-exercise model to predict maximal oxygen uptake VO2max and the American College of Sports Medicine ACSM's metabolic equations. The validity of usin...

journal_title：International journal of sports medicine

authors： Cunha FA,Midgley A,Montenegro R,Vasconcellos F,Farinatti P

更新日期：2015-10-01 00:00:00

abstract：:Intense exercise promotes long-term gains in cognitive functions. On the other hand, intense exercise may result in acute effects not clearly determined for cognitive performance. A condition of stochastic intensity ranging from moderate to maximal efforts is part of sports like cycling, in which cognitive integrity i...

journal_title：International journal of sports medicine

authors： Kunzler MR,Carpes FP

更新日期：2020-06-29 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

authors： Savard R,Després JP,Deshaies Y,Marcotte M,Bouchard C

更新日期：1985-10-01 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 nutrition of 57 native Bolivian boys living at high altitude (HA) in La Paz (+/- 4000 m) and of 63 boys living at low altitude (LA) in St. Cruz (+/- 400 m) is described. The dietary information was obtained with a 24-h recall method, by interviewing the child and mother. The food items are listed in household meas...

journal_title：International journal of sports medicine

authors： Post GB,Lujan C,San Miquel JL,Kemper HC

更新日期：1994-04-01 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

authors： Keizer HA,Beckers E,de Haan J,Janssen GM,Kuipers H,van Kranenburg G,Geurten P

更新日期：1987-12-01 00:00:00

abstract：:The development of intermittent endurance capacity, its underlying mechanisms and role in reaching professional level in soccer was investigated. The sample included 130 talented youth soccer players aged 14-18, who became professional (n = 53) or non-professional (n = 77) players in adulthood. In total 229 Interval S...

journal_title：International journal of sports medicine

authors： Roescher CR,Elferink-Gemser MT,Huijgen BC,Visscher C

更新日期：2010-03-01 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：:Over the past 25 years sport climbing has developed from an elite extreme sport subculture pursued by few into a mainstream recreational sport enjoyed globally by climbers of all ages, climbing abilities, and with pre-existing health conditions. As the demands and grades of climbing difficulty have increased over this...

journal_title：International journal of sports medicine

authors： Kuepper T,Morrison A,Gieseler U,Schoeffl V

更新日期：2009-06-01 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 purpose of this study was to evaluate the effect of using different mathematical models to describe the relationship between treadmill running speed and time to exhaustion. All models generated a value for an aerobic parameter (critical speed; S (critical)). 35 university students performed 5-7 constant-speed 0%-s...

journal_title：International journal of sports medicine

authors： Hill DW,Vingren JL,Nakamura FY,Kokobun E

更新日期：2011-07-01 00:00:00

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：:The determination of anaerobic capacity (AC) using treadmill ergometry is problematic from a methodological, as well as a technical standpoint. In this study, a procedure from Monod and Scherrer was modified to examine whether realistic magnitudes of AC could be determined using three subject groups with different lev...

journal_title：International journal of sports medicine

authors： Striegel H,Emde F,Ploog N,Roecker K,Horstmann T,Dickhuth HH

更新日期：2005-09-01 00:00:00

abstract：:Hypertension is not uncommon in childhood and adolescence; vascular and renal causes predominate. Non-pharmacologic therapy, including exercise, may lower blood pressure (BP). There are several articles relating to the use of exercise as a therapy for high BP. Most of these show a beneficial effect. The "dose" of exer...

journal_title：International journal of sports medicine

authors： Alpert BS

更新日期：2000-11-01 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

authors： Tanaka NI,Kanehisa H

更新日期：2014-06-01 00:00:00

abstract：:The present paper reviews evidence for the role of specific amino acids in the etiology of fatigue and the overtraining syndrome in athletes. An increase in the plasma concentration ratio of free tryptophan: branched-chain amino acids may mediate an increase in 5-HT synthesis in the brain and thus induce fatigue durin...

journal_title：International journal of sports medicine

authors： Parry-Billings M,Blomstrand E,McAndrew N,Newsholme EA

更新日期：1990-05-01 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：:The influence of carbohydrate (1 l/h of a 6 % carbohydrate beverage), gender, and age on salivary IgA (sIgA) changes and incidence of upper respiratory tract infection (URTI) was studied in 98 runners following two competitive marathon races. The pattern of change in sIgA concentration differed significantly between c...

journal_title：International journal of sports medicine

authors： Nieman DC,Henson DA,Fagoaga OR,Utter AC,Vinci DM,Davis JM,Nehlsen-Cannarella SL

更新日期：2002-01-01 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：:The total number of leucocytes, T lymphocyte subsets, mitogen induced proliferation of lymphocytes, Il-2 generation, adherence capacity and chemiluminescence of granulocytes were measured and a leukergy test performed in fifteen young cyclists. The investigations were carried out at rest at the beginning of a training...

journal_title：International journal of sports medicine

authors： Baj Z,Kantorski J,Majewska E,Zeman K,Pokoca L,Fornalczyk E,Tchórzewski H,Sulowska Z,Lewicki R

更新日期：1994-08-01 00:00:00

abstract：:Aerobic performance is negatively impacted by tropical climate due to impairment of thermoregulatory mechanisms. We tested the hypothesis that a torso application of a 4% menthol solution would have the same effect on a best performance 10-km run as an external use of cold water. Thirteen trained male athletes complet...

journal_title：International journal of sports medicine

authors： Hermand E,Collado A,Hue O

更新日期：2020-03-01 00:00:00

abstract：:This study investigated whether the combination of internal precooling (PC) and internal midcooling (MC cooling during exercise) would enhance performance more than MC alone. 9 trained males completed two 30-km cycling trials in a hot and humid environment (WBGT: 29±0.7°C, 80±0.02% relative humidity). For 30 min befor...

journal_title：International journal of sports medicine

authors： Riera F,Trong TT,Rinaldi K,Hue O

更新日期：2016-12-01 00:00:00

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

authors： Kvist M,Kujala UM,Heinonen OJ,Vuori IV,Aho AJ,Pajulo O,Hintsa A,Parvinen T

更新日期：1989-04-01 00:00:00

abstract：:The purpose of this study was to determine whether preferred pedal rate (PPR) could be used as an index of cycling performance. Thirteen competitive cyclists cycled at PPR during a graded test and a supra-threshold constant power test (CPT). The results showed that PPR values reported in CPT were correlated to both pe...

journal_title：International journal of sports medicine

authors： Nesi X,Bosquet L,Pelayo P

更新日期：2005-06-01 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

authors： Dugas JR,Barrett AM,Beason DP,Plymale MF,Fleisig GS

更新日期：2015-06-01 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：:Postexercise proteinuria has been observed in healthy adults but there was a need for information in young individuals. Boys and girls (n = 170) from 6 to 18 years of age were submitted to maximal exercise by the 20-meter shuttle run test. Urine collection was made prior to and 30 min after completion of the run. Tota...

journal_title：International journal of sports medicine

authors： Poortmans JR,Geudvert C,Schorokoff K,De Plaen P

更新日期：1996-08-01 00:00:00