Abstract：
:In a group of male distance runners, 23 out of 45 athletes showed decreased serum ferritin values (< 35 micrograms). The high prevalence of a typical iron deficiency in runners was confirmed in a subgroup of eight athletes in which the iron metabolism was studied in detail using radio-iron labelling and liver iron quantification. Most of these athletes showed an up-regulated 59Fe absorption and a decreased liver iron concentration as compared to a control group. 59Fe activity in collected samples of stool, urine or sweat was measured sensitively using a shielded high-pure germanium spectrometer. In periods without running, a faecal excretion of 59Fe equivalent to 1.5 ml blood loss/d was observed, which represents the normal iron excretion. Under intensive training or racing conditions, a significant increase up to 4.9-6.6 ml blood loss/day was observed, whereas excretion of 59Fe in urine or sweat was negligible. Thus, gastrointestinal blood loss was the main reason for the slightly negative iron balance in the runners. This confirms earlier studies in the literature using qualitative blood stool testing. A treatment with 100 mg ferrous iron/day for 3 months significantly increased the values for serum ferritin (from 34 +/- 11 to 54 +/- 18 micrograms/l) and liver iron (from 105 +/- 42 to 227 +/- 67 micrograms/g liver).
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Nachtigall D,Nielsen P,Fischer R,Engelhardt R,Gabbe EEdoi
10.1055/s-2007-972881subject
Has Abstractpub_date
1996-10-01 00:00:00pages
473-9issue
7eissn
0172-4622issn
1439-3964journal_volume
17pub_type
杂志文章abstract：:Uncoupling protein 3 is believed to be involved in total body energy expenditure, including the regulation of fat and glucose metabolism. These biochemical processes may distinguish top ultra-endurance triathletes from slower competitors. The aim of this study was to determine whether the uncoupling protein 3 gene is ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2004-815850
更新日期：2004-08-01 00:00:00
abstract：:Six successful members of the British Women's Lightweight Rowing Team were assessed before and after two-month (1990) and four-month (1991) periods of weight-reduction controlled by reduced caloric intake, while engaged in their normal physical training. Fat free mass (FFM) was calculated from body weight (BW) by util...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2007-1021090
更新日期：1994-11-01 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：:We describe a case of a female high school volleyball player who suffered a humeral shaft fracture while executing a floater serve. Based on the patient's history, a stress fracture was initially suspected. However, plain radiographs showed no periosteal reactions, callus formation or osteosclerosis, and thus we could...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-965065
更新日期：2007-11-01 00:00:00
abstract：:Ten untrained subjects and nine trained cyclists were examined during graduated ergometric exercise in the supine position. The levels of epinephrine and norepinephrine in the blood as well as the heart rate and oxygen intake were determined. At submaximum levels, epinephrine, norepinephrine, lactate, and the heart ra...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1034601
更新日期：1981-08-01 00:00:00
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：:We aimed to determine whether blood flow restriction (BFR) alters the characteristics of individual motor units during low-intensity (LI) exercise. Eight men (26.0±3.8 yrs) performed 5 sets of 15 knee extensions at 20% of one-repetition maximum (with and without BFR). Maximal isometric voluntary contractions (MVC) wer...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-0888-8816
更新日期：2019-09-01 00:00:00
abstract：UNLABELLED:To define the respective roles of the periphery and central oxygen transport in the exercise limitation of heart transplanted patients (HTR), we compared 11 HTR (15.1 +/- 10.8 months after transplantation) to six age and weight matched normal controls (C), during an incremental exercise test (30 W/3 min step...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972847
更新日期：1996-05-01 00:00:00
abstract：:During rowing, the respiratory musculature is confronted with dual demands: assisting the propulsive force generation and as the effector for ventilatory control. We determined the pulmomechanical and breathing pattern features of rowing-induced hyperpnea in five national class rowers (18 years old). Each subject perf...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021217
更新日期：1993-09-01 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：:This study investigated neuromuscular adaptations of the knee extensors after 8 weeks of plyometric training. 23 subjects were randomly assigned to an intervention group and a control group. We measured isometric maximum voluntary torque (iMVT), rate of torque development (RTD) and impulse (IMP) over different time in...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0033-1343401
更新日期：2014-02-01 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：:Bike shock absorption systems reduce the energy variation induced by terrain irregularities, leading to a greater comfort. However, they may also induce an increase in energy expenditure for the rider. More specifically, cross-country racers claim that rear shock absorption systems generate significant energy loss. Th...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2001-16242
更新日期：2001-08-01 00:00:00
abstract：:Long-term side effects of high doses of anabolic androgenic steroids self-administration were evaluated in this study. Twenty male bodybuilders, voluntarily starting steroid self-administration, were followed every 6 months over 2 years. Physical examination, haematological, metabolic and endocrine variables, semen an...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-965808
更新日期：2008-08-01 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：:Volleyball players commonly complain of pain in the hypothenar area. Fatigue fracture of the pisiform bone is suggested as a cause of this sport incapacity. The diagnostic importance of oblique and axial X-ray views of the Wrist is demonstrated. Early treatment by immobilization for 6 weeks usually results in complete...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1026064
更新日期：1982-02-01 00:00:00
abstract：:Vascular endothelial growth factor (VEGF) is a key compound for induction of angiogenesis in both physiological and pathological conditions. The aim of this study was to investigate the effect of androgenic-anabolic steroids (AAS) administration on VEGF mRNA expression in the rat soleus muscle after jumping training. ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0029-1234058
更新日期：2009-11-01 00:00:00
abstract：:This study sought to determine the influence of 16 months of progressive aerobic exercise on excess postexercise oxygen consumption (EPOC) and the extent EPOC contributed to weight management. Twenty-five overweight/obese women and 16 overweight/obese men participated in a 16-month exercise program (moderate-intensity...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2007-965111
更新日期：2008-01-01 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
pub_type： 杂志文章
doi：10.1055/s-2006-923863
更新日期：2006-12-01 00:00:00
abstract：:The effect of strenuous joint loading on the metabolism of articular cartilage in man is not known. The development of a non-invasive immunoassay for the assessment of the catabolism of cartilage aggrecan has enabled us to quantify keratan sulfate (KS), a component of aggrecan, in the serum of fifteen male marathon ru...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021279
更新日期：1992-05-01 00:00:00
abstract：:The oxygen uptake (VO2) attained during a constant speed 800-m pace trial on a treadmill is less than the maximal VO2 (VO2max) in male middle-distance runners with a high VO2max (i.e., > 65 ml x kg (-1) x min (-1)). We therefore investigated whether the VO2 attained was influenced by the pacing strategy adopted. Eight...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-837468
更新日期：2006-01-01 00:00:00
abstract：:Male Sprague-Dawley rats (n = 48, > 200 g) were progressively treadmill trained over 5 wk where they were running 60 min/d, 5 d/wk. One-half of the group consumed a high-fat diet (HF, 78.7% of energy), while one-half consumed a high-carbohydrate diet (HC, 68.7% of energy). On the day of the experiment, 6 rats per diet...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-971939
更新日期：1998-08-01 00:00:00
abstract：:The purpose of the study was to investigate whether severe fatigue, possibly leading to overreaching, could be diagnosed at an early stage by a combination of parameters. Seven well-trained male subjects (age [mean +/- SD]: 25.3 +/- 4.7 yr; body mass: 76 +/- 6.6 kg; VO2max: 61.1 +/- 7 ml.kg(-1).min(-1)) increased thei...
journal_title：International journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1055/s-2004-817914
更新日期：2005-01-01 00:00:00
abstract：:Considering the large and repetitive loads associated with jumping in team sports, automatic detection and quantification of jumping may show promise in reducing injury risks. The aim of this study was to validate commercially available inertial-movement analysis software to detect and quantify jumping in team sports....
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0044-100793
更新日期：2018-10-01 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
pub_type： 杂志文章,评审
doi：10.1055/s-2000-8497
更新日期：2000-11-01 00:00:00
abstract：:This study aims to investigate the relationship between subjective and external measures of load in professional youth football players whilst accounting for the effect of training theme or competition. Data from ratings of perceived exertion and global positioning system-derived measures of external training load wer...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1300-2959
更新日期：2020-12-01 00:00:00
abstract：:Five male endurance-trained runners completed an interval running session of 15 x 1-min intervals at 95% VO2 max. Venous blood samples were collected pre-exercise and then immediately, 30- and 60-minutes post-exercise. The response of cultures of total lymphocytes to mitogen (phytohaemagglutinin) were significantly re...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972608
更新日期：1997-02-01 00:00:00
abstract：:This study was designed to assess the effects of Ramadan-intermittent-fasting (RIF) and time-of-day on muscle power and fatigue during the Wingate test. In a randomized design, 10 football players completed a Wingate test at 07:00 and 17:00 h on 3 different occasions: one week before Ramadan (BR), the second week of R...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0031-1286251
更新日期：2012-02-01 00:00:00
abstract：:The aim of the present study was to investigate the relationships between heart rate variability (HRV) changes and both training variations and performances in elite swimmers. A secondary purpose was to measure catecholamine urinary excretion in elite swimmers to validate the HRV indices of sympathetic activity during...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2006-924490
更新日期：2007-05-01 00:00:00
abstract：:The purpose of this investigation was to determine the oxygen consumption, heart rate and plasma lactate responses at the fatigue threshold (FT) and estimate the length of time the FT could be maintained. Ten adult males (mean age +/- SD = 21.1 +/- 1.3 yrs) volunteered to perform a maximal treadmill test and FT test. ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1024686
更新日期：1991-06-01 00:00:00
