Abstract：
:The main purpose of the present study was to compare the reference metabolic equivalent (MET) value and observed resting oxygen uptake (VO2) for defining cardiorespiratory fitness (VO2max) and characterizing the energy cost of treadmill running. A heterogeneous cohort of 114 healthy men volunteered to participate. In Part 1 of the study, 114 men [mean±SD, age: 24±5 years; height: 177.1±7.9 cm; body mass: 75.0±10.0 kg] visited the laboratory twice for assessment of resting and maximal VO2 values to compare the reference MET value vs. observed resting VO2 and to investigate the association between resting VO2 and VO2max. In Part 2, 14 of the 114 men visited the laboratory once more to perform a 30-min bout of running at 8.0 km∙h-1/8.3 METs. The mean observed resting VO2 of 3.26 mL·kg-1·min-1 was lower than the reference MET value of 3.5 mL·kg-1·min-1 (P<0.001). Resting and maximal VO2 values relative to total body mass and fat-free mass were positively correlated (R=0.71 and 0.60, respectively; P<0.001). The maximal MET and energy cost of treadmill running were consequently underestimated when calculated using the reference MET value only for those with low VO2max (P=0.005 to P<0.001). In conclusion, the reference MET value considerably overestimated observed resting VO2 in men with low VO2max, resulting in underestimations of the maximal MET, exercise intensity prescription, and the energy cost of running.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Ázara HM,Farinatti PTV,Midgley AW,Vasconcellos F,Vigário P,Cunha FAdoi
10.1055/s-0043-115739subject
Has Abstractpub_date
2017-11-01 00:00:00pages
890-896issue
12eissn
0172-4622issn
1439-3964journal_volume
38pub_type
杂志文章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：:The aims of this study were: to compare energy expenditure (EE) estimated from the existing GT3X accelerometer equations and EE measured with indirect calorimetry; to define new equations for EE estimation with the GT3X in youth, adults and older people; and to define GT3X vector magnitude (VM) cut points allowing to ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0033-1337945
更新日期：2013-11-01 00:00:00
abstract：:The present study assessed the effectiveness of an RPE learning protocol for improving the validity of the Borg 6-20 RPE scale for self-regulating exercise intensity during Indoor Cycling (IC). 16 healthy adults performed 5 IC sessions. Heart rate (HR) was continuously monitored. In sessions 1 and 5, participants perc...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0033-1353166
更新日期：2014-05-01 00:00:00
abstract：:Earlier studies of endurance athletes have shown decreased levels of secretory IgA and an increased frequency of upper respiratory tract (URT) infections after periods of hard training. In this study, 14 world-class canoeists were studied during very hard physical training, after lower-intensity training combined with...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-972838
更新日期：1996-04-01 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
pub_type： 杂志文章
doi：10.1055/s-0042-107597
更新日期：2016-12-01 00:00:00
abstract：:Cyclists often use heart rate limits or power output zones, obtained from lactate parameters during incremental exercise testing, to control training intensity. However, the relationship between heart rate or power output, and blood lactate can be changed by several factors including dehydration. Therefore, in the cur...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-837460
更新日期：2005-12-01 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 broad spectrum of skills in sport, with their high demands on strength, speed, endurance, coordination, and flexibility, represents one of the greatest challenges to human motor performances. However, the basic neurophysiological mechanisms in sport are not principally different from those in everyday motor acts. ...
journal_title：International journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1055/s-2008-1025805
更新日期：1985-02-01 00:00:00
abstract：:To study the effects of long-term, home-based exercise on physical fitness and cardiovascular risk factors of middle-aged nonsmoking males, a controlled study was conducted in 61 sedentary Swiss men. Thirty-nine men were randomly allocated to jog 2 h/week for 4 months on an individually prescribed and heart-rate-contr...
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-2007-1024832
更新日期：1990-12-01 00:00:00
abstract：:The purpose of this study was to establish the validity of a 90-s all-out test for the estimation of maximal oxygen uptake (V.O (2max)) and submaximal aerobic ability as represented by critical power. We hypothesized that the fall in power output by the end of the 90-s all-out test (end power) would represent the exha...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2006-924513
更新日期：2007-05-01 00:00:00
abstract：:We investigated the possible influence of an exhaustive physical exercise on mental stress biomarkers (serotonin, tryptophan, and beta-endorphin) along with dopamine, noradrenaline and free fatty acids in an ultramarathon race in which 45 km was run on the first day and 90 km on the second. We obtained serum samples a...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1038490
更新日期：2008-11-01 00:00:00
abstract：:The purpose of this study was to compare acute mechanical and metabolic effects of 2 sessions of resistance training equated by volume and total resting time but with different set configuration: sets to failure (FS) vs. distribution of rest between each repetition (NFS). 10 male judoists completed a session consistin...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-0031-1299699
更新日期：2012-05-01 00:00:00
abstract：:The purpose of this report is to study serotonin reuptake of the brain in a severely overtrained athlete by using single-photon emission computed tomography (SPECT). A 26-year-old team athlete increased his training volume (by 200 %) and intensity markedly in a new high-level team. After two months, he started to feel...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2004-819952
更新日期：2004-02-01 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：:During the world junior speed skating championship 2002 all athletes (60 males, 56 females) were subjected to hematologic blood testing one day before the competition as requested by International Skating Union--ISU. This study aimed to obtain hematological reference values for junior athletes, whilst the influence of...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2005-865676
更新日期：2006-04-01 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
pub_type： 杂志文章
doi：10.1055/s-0032-1304591
更新日期：2012-12-01 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
pub_type： 杂志文章
doi：10.1055/a-0989-2387
更新日期：2019-12-01 00:00:00
abstract：:High-speed running and sprinting training play an important role in the development of physical capabilities, sport-specific performance and injury prevention among soccer players. This commentary aims to summarize the current evidence regarding high-speed running and sprinting training in professional soccer and to i...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1302-7968
更新日期：2020-12-08 00:00:00
abstract：:This study examined injury and physical fitness outcomes in Basic Combat Training (BCT) during implementation of Physical Readiness Training (PRT). PRT is the U.S. Army's emerging physical fitness training program. An experimental group (EG, n = 1284), which implemented the PRT program, was compared to a control group...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2003-40710
更新日期：2003-07-01 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：: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：: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
pub_type： 杂志文章
doi：10.1055/s-2007-1024879
更新日期：1989-04-01 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：: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：:The purpose of the present study was to assess the effects of 2-mercaptoacetate (MA), an inhibitor of hepatic fatty acid oxidation, on the metabolic and pancreatic hormone response to a prolonged (3 h) swimming exercise. All rats were first adrenodemedullated and were either submitted for 3 weeks to a normal (5% fat) ...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2007-1021021
更新日期：1994-02-01 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：:Patellofemoral joint (PFJ) pain syndrome is a commonly reported form of pain in female runners and military personnel. Increased PFJ stress may be a contributing factor. Few studies have examined PFJ stress running with added load. Our purpose was to analyze PFJ stress, PFJ reaction force, quadriceps force, knee flexi...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/a-1088-5467
更新日期：2020-06-01 00:00:00
abstract：:The purpose of this investigation was to determine the time course and magnitude of learning effects associated with repeated maximum cycling power tests and to determine if cycle-trained men exhibit different learning effects than active men who are not cycle-trained. Cycle-trained (N = 13) and active men (N = 35) pe...
journal_title：International journal of sports medicine
pub_type： 历史文章,杂志文章
doi：10.1055/s-2000-7415
更新日期：2000-10-01 00:00:00
abstract：:During an exhaustive graded bicycle spiroergometer test, several arterial blood samples were taken from six type I diabetics and seven normal controls for determination of catecholamines and parameters of carbohydrate and lipid metabolism. In both groups during exercise, glucose remained unchanged, and lactate associa...
journal_title：International journal of sports medicine
pub_type： 杂志文章
doi：10.1055/s-2008-1026021
更新日期：1983-05-01 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
