Abstract：
:Male (n = 9) and female (n = 8) collegiate cross-country runners were studied during a training session to determine the amount of iron lost in the sweat. Sweat samples were collected from the arm using polyethylene bags. Total sweat loss was determined by weighing subjects before and after the runs. Average time of sweat collection was 42 min for males and 39 min for females. Sweat rate for the males (717.5 +/- 145.9 g/m2/h) was significantly greater than for the females (460.1 +/- 142.9 g/m2/h); however, the sweat rate per km was not significantly different. Females had a significantly greater sweat iron concentration (0.417 +/- 0.024 mg/l) than males (0.179 +/- 0.011 mg/l). Rate of sweat iron loss was not significantly different for females (0.276 +/- 0.140 mg/h) and males (0.21 +/- 0.13 mg/h). Sweat iron concentration was inversely related with sweat rate (r = -0.64). Our data suggest that although males lose more total sweat than females, the higher sweat iron concentration of females leads to similar rates of iron loss. For female runners, sweat iron loss coupled with a low dietary iron intake may result in a negative iron balance.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Lamanca JJ,Haymes EM,Daly JA,Moffatt RJ,Waller MFdoi
10.1055/s-2007-1024978subject
Has Abstractpub_date
1988-02-01 00:00:00pages
52-5issue
1eissn
0172-4622issn
1439-3964journal_volume
9pub_type
杂志文章abstract：:Prior research about the effects of the amount of exercised muscle mass upon cardiovascular responses (CVR) has neglected a potential bias related to total exercise and concentric/eccentric duration. Autonomic responses and perceived exertion (RPE) were compared in resistance exercises performed with larger and smalle...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0043-116671
更新日期：2017-11-01 00:00:00
abstract：:Brain 5-HT neurotransmission has been described to be down-regulated in depressed people, and also suspected to be changed in overtraining state, the consequence of long-term physical overloading and stress in athletes. We studied brain serotonin (5-HT) transporter binding i.e., 5-HT reuptake with the specific radioli...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-872930
更新日期：2006-09-01 00:00:00
abstract：:The albuminuria occurring after swimming in splenectomized dogs was investigated. Swimming in splenectomized dogs induces metabolic acidosis, a decrease in renal vascular conductance, and an increase in plasma renin activity, all three factors possibly implicated in the occurrence of albuminuria. The administration of...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025922
更新日期：1984-12-01 00:00:00
abstract：:Mechanical efficiency of positive work (eta+) and elastic behavior of human skeletal muscles were investigated on a special sledge apparatus which allowed the use of the normal stretch-shortening cycle exercises. Twenty-five young men were investigated in a total of 92 exercise situations, in which the intensity of th...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025751
更新日期：1986-06-01 00:00:00
abstract：:Signs of overuse after intense muscular exertion are well described in adults, while little research has been conducted in children. The aim of the study was to investigate some indirect markers of muscle damage in 13 years old boys following two different protocols of one-leg stepping exercise to exhaustion. This ste...
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-2007-971101
更新日期：1999-02-01 00:00:00
abstract：:The aims of this pilot study were to investigate how a novel sagittal plane kinematic measurement - the lower extremity contact angle (LECA) - relates to the landing dynamics of elite male volleyball athletes with and without patellar tendinopathy. The LECA was defined as the angle between the ground and the line conn...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0034-1395586
更新日期：2015-05-01 00:00:00
abstract：:Length and weight for age (1-12 months) charts are presented for the longitudinal Euro-Growth Study. "Weight-for-length", another widely used growth chart, presents a problem from a methodological point of view. Target length values (53-77 cm) are not observed in all infants, leading to truncated age distributions at ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972716
更新日期：1997-07-01 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：:This study assessed the validity of a photoplethysmographic heart rate (HR) monitor, the Polar OH1 in various sports performed in ecological conditions: running, cycling, soccer, kayaking, walking, tennis and fitness. Seventy trained athletes (56 males, 14 females) wore the Polar OH1 armband and the H7 chest belt duri...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-0875-4033
更新日期：2019-07-01 00:00:00
abstract：:Inhibition of adipose tissue lipolysis, leading to a reduced availability of non-esterified fatty acids for energy production in the active skeletal muscles, may be involved in the impairment of endurance exercise capacity after administration of a beta-adrenoceptor blocking agent. The effect of increasing the availab...
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-2007-1021137
更新日期：1993-01-01 00:00:00
abstract：:The purpose of this study was to examine the effect of different loads on repetition speed during single sets of repetitions to failure in bench press and parallel squat. Thirty-six physical active men performed 1-repetition maximum in a bench press (1 RM (BP)) and half squat position (1 RM (HS)), and performed maxima...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-872825
更新日期：2006-09-01 00:00:00
abstract：:The purpose of this study was to determine if an eight-week intrahospital supervised, conditioning program improves functional capacity and quality of life (QOL) in children (4 boys, 4 girls) (mean [SD] age: 10.9 [2.8] years [range: 8-16]) who have undergone bone marrow transplantation (BMT) for leukemia treatment wit...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-965571
更新日期：2008-05-01 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
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1055/s-2004-819941
更新日期：2004-07-01 00:00:00
abstract：:The purpose of this study was to assess the intensity and energy cost of dance simulation in relation to the American College of Sports Medicine (ACSM) recommendations on the quantity and quality of exercise for developing and maintaining cardiorespiratory fitness, and to assess its safety. Forty subjects (21 males an...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2002-20132
更新日期：2002-02-01 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 analyzes stroke phases and arm and leg coordination during front crawl swimming as a function of swim velocity and performance level. Forty-three swimmers constituted three groups based on performance level. All swam at three different swim velocities, corresponding to the paces appropriate for the 800 m, 1...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2000-8855
更新日期：2000-01-01 00:00:00
abstract：:Electromyographic and force production characteristics of leg extensor muscles of elite weight lifters (n = 14) were examined during isometric, concentric, and various stretch-shortening cycle exercises. The data showed that utilization of stored elastic energy of leg extensor muscles was observable in countermovement...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1025752
更新日期：1986-06-01 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 this study was: i) to compute an energy balance of a slalom kayak competition by measuring the percentage contributions of the aerobic and anaerobic energy sources to total metabolic power (E(tot)); and ii) to compare these data with those obtained, on the same subjects, over a flat-water course covered at ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-865922
更新日期：2006-07-01 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：: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：:A prospective study of acute injuries from sports and physical exercise was carried out during 1 year in a total population of a municipality with 31,620 inhabitants. Data on exposure were collected: the number of participants in each sport, the hours of participation, and number of weeks in the season per year. The n...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1025052
更新日期：1988-12-01 00:00:00
abstract：:This prospective experimental study aimed to compare effects of 3 different home-based postoperative respiratory muscle training protocols - inspiratory, expiratory and combined, in the patients' postoperative recovery, regarding safety and respiratory muscle function, pulmonary function, physical fitness, physical ac...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1096-0913
更新日期：2020-06-01 00:00:00
abstract：:This study evaluated the effect of ischemic preconditioning (IPC) on resistance exercise performance in upper limbs. After 12-RM load determination, 21 men attended 4 trials separated by 3 days in a randomized crossover design: IPC (4×5-min occlusion 220 mmHg/reperfusion 0 mmHg) in arms and in thighs, and SHAM (equal ...
journal_title：International journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1055/s-0042-109066
更新日期：2016-09-01 00:00:00
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 cart...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021056
更新日期：1994-07-01 00:00:00
abstract：:The maximal power that muscles can generate is reduced at low muscle temperatures. However, in prolonged heavy exercise in the heat, a high core temperature may be the factor limiting performance. Precooling has been shown to delay the attainment of hyperthermia. It is still unclear if the whole body should be cooled ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-865746
更新日期：2006-05-01 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：: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
pub_type： 杂志文章
doi：10.1055/s-2008-1025853
更新日期：1985-10-01 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
pub_type： 杂志文章
doi：10.1055/s-0034-1395590
更新日期：2015-10-01 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
