Abstract：
:The purpose of this study was to examine the accuracy and quality of a series of cycle ergometry tests used to estimate maximal aerobic capacity (VO2max). One-hundred nine males and 71 females participated in five tests: a maximal exercise test on the treadmill, three Air Force Cycle Ergometry Tests (AF1, AF2, AF3), and a Progressive cycle ergometry test (PROG). The VO2max value measured during the treadmill test was compared with the VO2max estimates from each ergometry test. The AF1, AF2, and AF3 results were used to determine reliability. The mean estimated VO2max for each, except the PROG, was significantly different (P < 0.05) from the measured VO2max. The AF1 and AF-avg tests underestimated VO2max by 8.0 and 6.5 mL.kg-1.min-1, respectively, values which were 17.3 and 14.9% lower than the measured VO2max. Correlation coefficients between estimated VO2max values and the measured VO2max ranged from 0.59 to 0.80 with SEE ranging from 1.8 to 2.2 mL.kg-1.min-1. The PROG had the greatest sensitivity (82.2%), while the AF2 had the greatest specificity (70.6%). Additionally, 23.4% of the VO2max estimates from the PROG were within +/- 5% of the measured VO2max compared with 9.9% for the average of the Air Force tests. The intraclass correlation coefficient for the three AF tests or the reliability for a single AF test was 0.26. In sum, the Air Force test provides an estimate of VO2max, and hence aerobic capacity, which is unreliable and underestimates the true VO2max by approximately 15%.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Lockwood PA,Yoder JE,Deuster PAdoi
10.1097/00005768-199711000-00019subject
Has Abstractpub_date
1997-11-01 00:00:00pages
1513-20issue
11eissn
0195-9131issn
1530-0315journal_volume
29pub_type
杂志文章abstract：:Perceptual and physiological congruity was examined during recovery from high-intensity dynamic exercise. Nine males (24.8 +/- 0.6 yr; VO2max; 52.3 +/- 1.5 ml.kg-1.min-1) undertook in random order four maximal treadmill protocols. Treadmill speed was held constant (5.3 km.h-1) while grade was incremented by 2, 4, 6, o...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1992-03-01 00:00:00
abstract：PURPOSE:This study aimed to quantify the repeated oxygen deficits attained during intermittent endurance exercise by measuring oxygen consumption (V˙O2) and oxygen demand (V˙O2) throughout a simulated roller ski race. METHODS:Eight male elite cross-country skiers (V˙O2peak, 77.4 ± 4.4 mL·kg⋅min) raced a 13.5-km roller...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000002209
更新日期：2020-04-01 00:00:00
abstract：PURPOSE:Supplementation with inorganic nitrate has been suggested to be an ergogenic aid for athletes as nitric oxide donor. The purpose of this study was to determine whether ingestion of inorganic sodium nitrate benefits well-trained athletes performing a 40-min exercise test in laboratory conditions. In addition, we...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,随机对照试验
doi：10.1249/MSS.0b013e3182687e5c
更新日期：2012-12-01 00:00:00
abstract：:Physical activity has been shown to be inversely related to coronary heart disease (CHD). The role of high density lipoprotein (HDL) particles in the process of reverse cholesterol transport may be a link between exercise and the prevention of CHD. The aim of the present study was to evaluate the effects of acute exer...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：PURPOSE:The objective of this study is to determine the effect of body mass index (BMI) on level of agreement between six previously established prediction equations for three commonly used accelerometers to predict summary measures of energy expenditure (EE) in youth. METHODS:One hundred and thirty-one youth between ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e318267b8f1
更新日期：2012-12-01 00:00:00
abstract：:The close balance between the O2 requirement to perform exercise and the O2 supply was analyzed. A non-uniform capillary PO2 can result in anaerobic metabolism in some muscle fibers despite an apparently adequate mean capillary PO2. The pattern of lactate increase for constant work rates and incremental exercise is de...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/00005768-198606000-00017
更新日期：1986-06-01 00:00:00
abstract：:Data obtained from 16-mm film of world caliber Olympic weight lifters performing at major competitions were analyzed to study energy changes during body segment and barbell movements, energy transfer to the barbell, and energy transfer between segments during the lifting movements contested. Determination of barbell a...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1982-01-01 00:00:00
abstract：PURPOSE:Physical activity (PA) promotion among youth is a public health priority, and there is a need for robust surveillance systems to help support such initiatives. Existing youth PA self-report instruments that are used for surveillance lack information regarding the types and contexts of activity. Further, these i...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001562
更新日期：2018-06-01 00:00:00
abstract：PURPOSE:This study investigated the effects of the menstrual cycle on prolonged exercise performance both in temperate (20°C, 45% relative humidity) and hot, humid (32°C, 60% relative humidity) conditions. METHODS:For each environmental condition, 12 recreationally active females were tested during the early follicula...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e3182656f13
更新日期：2012-11-01 00:00:00
abstract：PURPOSE:The effects of chronic eccentric-only versus concentric-only exercise on muscle physiology and blood biochemistry were investigated. METHODS:Twenty women performed on an isokinetic dynamometer a concentric (n = 10;mean ± SEM: age = 21.0 ± 0.4 yr, body fat = 22.0% ± 0.9%) or an eccentric (n = 10, age = 20.0 ± 0...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,随机对照试验
doi：10.1249/MSS.0b013e3181e91d90
更新日期：2011-01-01 00:00:00
abstract：PURPOSE:This study aimed to analyze the influence of foot strike pattern on running economy and biomechanical characteristics in subelite runners with a similar performance level. METHODS:Twenty subelite long-distance runners participated and were divided into two groups according to their foot strike pattern: rearfoo...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000000139
更新日期：2014-03-01 00:00:00
abstract：PURPOSE:Increasing step rate has been shown to elicit changes in joint kinematics and kinetics during running, and it has been suggested as a possible rehabilitation strategy for runners with patellofemoral pain. The purpose of this study was to determine how altering step rate affects internal muscle forces and patell...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e3182a78c3a
更新日期：2014-03-01 00:00:00
abstract：:Although onset and maximal claudication pain are attained sooner as exercise intensity is increased, it is unclear whether dissipation of pain during recovery is altered. Thus, this study examined whether walking at gradually higher intensity would prolong the time needed for claudication pain to dissipate during reco...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1993-08-01 00:00:00
abstract：:MRI is an excellent noninvasive method of diagnosing difficult shoulder problems. Although usually not needed for classic primary impingement syndrome or clinically obvious rotator cuff tears, MRI may be helpful in diagnosing secondary causes of impingement or in some cases involving partial rotator cuff tears. Some s...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
doi：10.1097/00005768-199804001-00002
更新日期：1998-04-01 00:00:00
abstract：:The present investigation tested the hypotheses that there would be greater prevalence of expiratory flow limitation (EFL) in endurance-trained (ET) youth cyclists compared with a recreationally active control (CON) group. METHODS:Twelve ET youth male cyclists (16.3 ± 1.0 yr (13-18 yr), 176.5 ± 6.2 cm, 64.2 ± 5.9 kg)...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000002325
更新日期：2020-09-01 00:00:00
abstract：:This paper introduces the terminology and application of parameter estimation techniques for clarifying models of pulmonary gas-exchange control dynamics. Results are given of modeled first-order systems, and the extension of such models to higher orders is discussed with examples. It is emphasized that justification ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1990-02-01 00:00:00
abstract：PURPOSE:Power training plays an essential part in many sport disciplines. The importance of eccentric power training remains a matter of controversial discussion. The objective of this study was therefore to investigate the difference in metabolic reaction between eccentric and concentric stress in comparable work. ME...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-200105000-00018
更新日期：2001-05-01 00:00:00
abstract：PURPOSE:This study aims to examine whether muscle glycogen availability is associated with fatigue in a repeated exercise bout following short-term recovery. METHODS:Ten endurance-trained individuals underwent two trials in a repeated-measures experimental design, each involving an initial run to exhaustion at 70% of ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000000737
更新日期：2016-01-01 00:00:00
abstract：PURPOSE:We aimed to evaluate in a longitudinal study the effect of intensive training on cardiac autonomic control in athletes using 24-h heart rate variability analysis. METHODS:Time and frequency domain measures of heart rate variability were calculated from 24-h Holter monitoring in 15 high level bicyclists (mean a...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199805000-00008
更新日期：1998-05-01 00:00:00
abstract：:Ten subjects were studied to determine within-subject variance (Swi2), and its components, biovariability (Si2) and technological error (Se2) of residual lung volume (RLV). Each subject's RLV was determined 18 times using the oxygen dilution method (O2D) over a 5-day period. Se2 was measured using a 9.0 l spirometer a...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1986-08-01 00:00:00
abstract：PURPOSE:This study evaluated the effect of Tai Chi Chuan (TCC) on the autonomic nervous modulation in older persons. METHODS:Twenty TCC practitioners and 20 normal controls were included in this study. The stationary state spectral heart rate variability (HRV) measures between TCC practitioners and normal controls, an...
journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
doi：10.1249/01.MSS.0000099242.10669.F7
更新日期：2003-12-01 00:00:00
abstract：:The purpose of this study was to compare gastric emptying (GE) responses during intense, prolonged cycling and running. It is important to discern whether gastric emptying (GE) responses are exercise-mode specific, since the findings of cycling and running studies are often compared and applied to one another. Ten mal...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1991-03-01 00:00:00
abstract：UNLABELLED:Hiking is a recreational activity shown to offer significant positive effects on the human body. However, walking downhill and external load carriage have both been shown to increase the risk of musculoskeletal pain and injury. The use of hiking poles has been demonstrated to be successful in reducing forces...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/01.mss.0000240328.31276.fc
更新日期：2007-01-01 00:00:00
abstract：INTRODUCTION:Caffeine is an exercise performance enhancer widely used by individuals engaged in training or competition under heat-stressed conditions. Caffeine ingestion during exercise in the heat is believed to be safe, since it does not greatly affect body temperature responses, heart rate or body fluid status. How...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000002537
更新日期：2020-10-07 00:00:00
abstract：PURPOSE:To assess the validity of the new Actical accelerometer step count function. METHODS:Actical step counts were compared according to two criterion standards. 1) Eight Acticals were assessed using a mechanical shaker table under six different testing conditions. 2) Thirty-eight volunteers (aged 9-59 yr) wore eig...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/mss.0b013e3804ec4e9
更新日期：2007-07-01 00:00:00
abstract：PURPOSE:The purpose of this study was to measure noninvasively the absolute concentrations of muscle adenosine triphosphate [ATP], phosphocreatine [PCr], inorganic phosphate (Pi), and glycogen [Gly] of elite soccer players. METHODS:Magnetic resonance spectroscopy (31P- and 13C-MRS) was used to measure the concentratio...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199911000-00013
更新日期：1999-11-01 00:00:00
abstract：PURPOSE:The purpose of this study was to compare the predictive accuracy of previously published skinfold (SKF) equations for estimating body density of 134 premenopausal African-American women (18 to 40 yr). METHODS:The equations cross-validated were: the sum of seven skinfolds equation (JPW7) and the sum of three sk...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199811000-00015
更新日期：1998-11-01 00:00:00
abstract：:Children and adolescents possess higher weight-related maximum oxygen consumption (VO2max) levels than older individuals. The capacity of prepubescent children to improve aerobic fitness with endurance training is controversial, and reported data have provided conflicting evidence. In the adult, physical activity of c...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
doi：
更新日期：1985-10-01 00:00:00
abstract：PURPOSE:This study aimed to evaluate the effect of an exercise program of two different intensities, with nutritional control, on gestational weight gain (GWG), infant birth weight, and maternal weight retention at 2 months postpartum (2 mopp). METHODS:Pregnant women (prepregnancy body mass index = 18.5-24.9 kg·m) wer...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,随机对照试验
doi：10.1249/MSS.0b013e31825365f1
更新日期：2012-08-01 00:00:00
abstract：:Anaerobic ATP production in skeletal muscle and the accumulated oxygen deficit (O2D) incurred during an exhaustive cycle bout (duration = 173 +/- 24 s; intensity = 112 +/- 3% VO2peak), were determined in 10 male cyclists (mean +/- SD: VO2peak = 69.8 +/- 4.2 ml.kg-1.min-1). Anaerobic ATP production (mmol.kg-1 d.w.) was...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-199603000-00007
更新日期：1996-03-01 00:00:00
