Abstract:
:Serum zinc was determined using atomic absorption spectrophotometry in 160 training athletes (57 females) in the morning at rest. In 23.3% of the male and 43% of the female athletes, serum Zn was lower than the limit accepted for the normal range (75 microgram/dl or 11.5 mumol/l). The average serum Zn (96.7 +/- 12.6 microgram/dl) and the range of the values found in a control group of 15 young adult males did not differ from the accepted values in the literature. In 22 randomly selected male athletes, serum Zn fractions were determined using polyethylene glycol precipitation at pH 7.1; 22.2% of total Zn was bóund to alpha2-macroglobulin, the ratio being very close to 1 atom of metal per molecule of globulin. The possible reasons that may influence the serum Zn level in athletes are discussed with regard to the present knowledge in both exercise physiology and metabolism of zinc in man.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Haralambie Gdoi
10.1055/s-2008-1034599subject
Has Abstractpub_date
1981-08-01 00:00:00pages
135-8issue
3eissn
0172-4622issn
1439-3964journal_volume
2pub_type
杂志文章abstract::In 1988 Segura and Ventura (14) reported that 1.2 g of L-Tryptophan (L-TRY) supplementation increased total exercise time by 49.4% when the subjects were running at 80% of maximal oxygen uptake (VO2max). In human performance research, acute improvements of that category are rather uncommon. Both for this reason and be...
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-2007-1021302
更新日期:1992-08-01 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 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
pub_type: 杂志文章
doi:10.1055/s-0028-1105938
更新日期:2009-04-01 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::Pulse oximetry allows non-invasive monitoring of arterial oxygen saturation (SO2). To study the validity of pulse oximetry, comparative measurements were performed. During exhaustion limited exercise SO2-values measured by pulse oximetry (SO2puls), calculated SO2-values (algorithms of Kelman, Severinghaus, and Siggaar...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024756
更新日期:1990-02-01 00:00:00
abstract::This study was undertaken to assess whether ventilatory anaerobic threshold (T vent) reflected endurance capacity (EC) in sports medical control. Fifteen subjects performed two cycle ergometer tests. The first was a maximal exercise test, which consisted of increasing the load 20 W/min until exhaustion. During this te...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025654
更新日期:1987-06-01 00:00:00
abstract::The aim of this research was to study the effect of hand paddles on the pitch, the sweepback angles and other stroke kinematic characteristics of the hand during front crawl swimming. Ten female competitive swimmers swam without and with small (116 cm (2)) and large (268 cm (2)) paddles. Four cameras (60 Hz) were used...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-965570
更新日期:2008-05-01 00:00:00
abstract::The influence of exercise training on plasma amino acid concentrations at rest and after exercise was examined in a highly trained group of humans and compared with the response of a control group of nontrained healthy humans. After a bout of intense exercise at the same relative work load, the trained group exhibited...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024908
更新日期:1989-08-01 00:00:00
abstract::The aim of the present study was to compare the physiological responses when the crank rate was chosen spontaneously (Ts) or set at +/- 10% (T-10%, T+10%) of the freely chosen rate, during two upper body exercises: i) a sub-maximal test (T(SUB)) in which intensities ranged from 50 to 80% (118.4 +/- 10.2 to 189.5 +/- 1...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-971124
更新日期:1999-05-01 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::We recently demonstrated that creatine supplementation increased some features of lung allergic sensitization in mice. On the other hand, other studies have shown that aerobic exercise inhibited allergic airway inflammation and remodeling. We hypothesized that aerobic exercise may decrease the exacerbatory effects of ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0029-1224176
更新日期:2009-09-01 00:00:00
abstract::To examine measures of total and regional body composition using dual X-ray absorptiometry (DXA) in NCAA Division I collegiate equestrian athletes, 31 female collegiate equestrian athletes were matched to a population of normal controls by age and body mass index. Total and regional fat tissue mass (FM), lean tissue m...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-0863-4607
更新日期:2019-05-01 00:00:00
abstract::This study investigated whether 4 weeks of daily supplementation with 500 or 1000 mg of Vitamin C and 500 or 1000 IU of Vitamin E could modify biochemical and ultrastructural indices of muscle damage following a 21 km run. Fifteen experienced male distance runners were divided into two groups (vitamin or placebo) and ...
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-2002-19273
更新日期:2002-01-01 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::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::Unlike in Europeans and Africans, the relationship between the human guanine nucleotide binding beta polypeptide 3 (GNB3) C825T gene polymorphism (rs5443) and blood pressures is inconsistent in Asians. The aim of the study was to investigate whether the GNB3 genotype demonstrates different associations with resting bl...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0029-1233465
更新日期:2009-12-01 00:00:00
abstract::The study aimed to verify possible associations between game-play running performance and outcomes derived from fitness (running) tests in female futsal players. Sixteen women professional elite futsal players from a 1st division league team (19.2±2 years-old, 4.3±2.1 years of experience) participated. Firstly, a grad...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-1202-1496
更新日期:2021-01-01 00:00:00
abstract::Caffeine enhances endurance performance; however, its effect on accumulated lactate remains unclear. Conversely, taurine, which also enhances endurance performance, decreases accumulated lactate. In this study, the effect of combination of caffeine and taurine on endurance performance was assessed. Mice ran on a tread...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0028-1104574
更新日期:2009-07-01 00:00:00
abstract::This study investigated sex-specific effects of surface instability on kinetics and lower extremity kinematics during drop jumping and landing. Ground reaction forces as well as knee valgus and flexion angles were tested in 14 males (age: 23±2 years) and 14 females (age: 24±3 years) when jumping and landing on stable ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
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更新日期:2015-01-01 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
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journal_title:International journal of sports medicine
pub_type: 杂志文章
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更新日期:2006-11-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-965108
更新日期:2008-02-01 00:00:00
abstract::The present study was designed to investigate the neuronal control and biomechanical effects of stumbling reactions. To induce these perturbations, a specially prepared treadmill was used which allowed rapid and powerful changes of treadmill speed. EMG recordings of leg muscles were related to cinematic movement patte...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025785
更新日期:1986-12-01 00:00:00
abstract::Maximal voluntary contractions (MVC) were performed by five male subjects as repeated knee extensions separated by 13-s rest periods for the purposes of studying performance capability, physiologic responses, and recruitment patterns among fast-twitch (FT) and slow-twitch (ST) extrafusal muscle fibers for this type of...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1034593
更新日期:1981-05-01 00:00:00
abstract::Low back pain (LBP) is a common symptom in the populations of western countries, and adolescent athletes seem to be prone to LBP. The main objective of this study was to analyze the point (LBP within the last 48 h), 1-year (LBP within the last 12 months) and lifetime (LBP within the entire life) prevalence rates of LB...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-0033-1358731
更新日期:2014-07-01 00:00:00
abstract::The 1982 Aberdeen marathon race was held on a cool (12 degrees C) day on a flat, fast course. Fifty-nine of the 750 runners volunteered to take part in this study: rectal temperature of these competitors was measured within 5 min of completing the race. Venous blood samples were obtained before and immediately after t...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025806
更新日期:1985-02-01 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 aim of this study was to investigate whether rs41274853 in the 3'-untranslated region of the ciliary neurotrophic factor receptor gene (CNTFR) is associated with elite sprint/power athletic status and assess its functional significance. A total of 211 Japanese sprint/power track and field athletes (62 internationa...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0035-1564257
更新日期:2016-05-01 00:00:00
abstract::The aim of this study was to investigate the effect of short-term, moderate intensity and low volume endurance training on gonadal hormone profile in untrained men. Fifteen young, healthy men performed an endurance training of 5-week duration on a cycle ergometer. Before and after the exercise program all participants...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0029-1202340
更新日期:2009-07-01 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
pub_type: 杂志文章
doi:10.1055/s-2007-965115
更新日期:2008-02-01 00:00:00