Comparison of Kenz Lifecorder EX and ActiGraph accelerometers in 10-yr-old children.

abstract：PURPOSE:the objective of this study was to characterize the biomechanical effects of step rate modification during running on the hip, knee, and ankle joints so as to evaluate a potential strategy to reduce lower extremity loading and risk for injury. METHODS:three-dimensional kinematics and kinetics were recorded fro...

journal_title：Medicine and science in sports and exercise

authors： Heiderscheit BC,Chumanov ES,Michalski MP,Wille CM,Ryan MB

更新日期：2011-02-01 00:00:00

abstract：PURPOSE:This study aimed to examine the effects of footwear and neuromuscular fatigue induced by short distance trail running (TR) on running economy (RE) and biomechanics in well-trained and traditionally shod runners. METHODS:RE, vertical and leg stiffness (Kvert and Kleg), as well as foot strike angle were measured...

journal_title：Medicine and science in sports and exercise

authors： Vercruyssen F,Tartaruga M,Horvais N,Brisswalter J

更新日期：2016-10-01 00:00:00

abstract：:The reproducibility of the Bruce exercise test protocol for the determination of maximal aerobic activity was evaluated in sedentary older women. Seventeen women between the ages of 51 and 68 yr performed five maximal graded exercise tests to volitional fatigue on a treadmill. VO2max (mL.kg-1.min-1) values averaged 27...

journal_title：Medicine and science in sports and exercise

authors： Fielding RA,Frontera WR,Hughes VA,Fisher EC,Evans WJ

更新日期：1997-08-01 00:00:00

abstract：PURPOSE:The objective of this study is to determine whether childhood muscular fitness phenotypes (strength, endurance, and power) are independently associated with adult metabolic syndrome (MetS). METHODS:We conducted a longitudinal study including 737 participants who had muscular fitness measures in 1985 when age 9...

journal_title：Medicine and science in sports and exercise

authors： Fraser BJ,Huynh QL,Schmidt MD,Dwyer T,Venn AJ,Magnussen CG

更新日期：2016-09-01 00:00:00

abstract：PURPOSE:The aim of this study was to assess the feasibility and the effects of a long-term training program with endurance and strength elements for patients with advanced congestive heart failure (CHF). METHODS:We studied 14 patients, mean age 57 yr, mean NYHA class 2.7, mean LVEF 29%, and mean VO2max 17.2 mL x kg(-1...

journal_title：Medicine and science in sports and exercise

authors： Delagardelle C,Feiereisen P,Krecké R,Essamri B,Beissel J

更新日期：1999-08-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine whether there is a relationship between overall fitness improvement and varying amounts of running and movement mileage. METHODS:Subjects were male U.S. Navy recruits (N = 1703, 25 divisions), ages 17-35 yr (mean age = 20.1 +/- 2.9 yr), who attended boot camp from Apr...

journal_title：Medicine and science in sports and exercise

authors： Trank TV,Ryman DH,Minagawa RY,Trone DW,Shaffer RA

更新日期：2001-06-01 00:00:00

abstract：:This symposium is concerned with the use of resistive exercise in cardiac and coronary prone populations. In the past, these populations have been refrained from resistive exercise. However, recent studies suggest that this form of exercise is safe and has favorable effects on physical fitness, cardiac risk factors su...

journal_title：Medicine and science in sports and exercise

authors： Stewart KJ

更新日期：1989-12-01 00:00:00

abstract：PURPOSE:Above a given exercise intensity, rapid muscle fatigue will occur. We explored the possibility of assessing torque threshold for peripheral fatigue during single-legged repetitive isometric knee extensor exercise. We hypothesized this fatigue threshold to be related to the general aerobic fitness level and the ...

journal_title：Medicine and science in sports and exercise

authors： de Ruiter CJ,Maas EA,Wesseling MG,de Haan A

更新日期：2012-07-01 00:00:00

abstract：PURPOSE:Although independent relationships between sitting behaviors (mainly television viewing) and health outcomes have been reported, few studies have examined the measurement properties of self-report sitting questions. This study assessed gender-specific test-retest reliability and validity of a questionnaire that...

journal_title：Medicine and science in sports and exercise

authors： Marshall AL,Miller YD,Burton NW,Brown WJ

更新日期：2010-06-01 00:00:00

abstract：:Machine learning classification models for accelerometer data are potentially more accurate methods to measure physical activity in young children than traditional cut point methods. However, existing algorithms have been trained on laboratory-based activity trials, and their performance has not been investigated unde...

journal_title：Medicine and science in sports and exercise

authors： Ahmadi MN,Brookes D,Chowdhury A,Pavey T,Trost SG

更新日期：2020-05-01 00:00:00

abstract：UNLABELLED:Controversy surrounds whether running mechanics make good predictors of running economy (RE) with little known about the development of an economical running gait. PURPOSE:The aim of this study was to identify if mechanical or physiological variables changed during 10 wk of running in beginners and whether ...

journal_title：Medicine and science in sports and exercise

authors： Moore IS,Jones AM,Dixon SJ

更新日期：2012-09-01 00:00:00

abstract：PURPOSE:Increased serum testosterone (TST) occurs in response to resistance exercise and is associated with increased muscle mass. However, the effects of elevated TST and sequential resistance exercise bouts on androgen receptor (AR) expression in humans are not well known. This study examined three sequential bouts o...

journal_title：Medicine and science in sports and exercise

authors： Willoughby DS,Taylor L

更新日期：2004-09-01 00:00:00

abstract：PURPOSE:The effect of quantified resistance and high impact exercise training on bone mass as modified by age and oral contraceptive (OCont) use in young women was studied. METHODS:Women were categorized by age (18-23 vs 24-31 yr) and OCont use, and were then randomized into either three sessions of resistance exercis...

journal_title：Medicine and science in sports and exercise

authors： Weaver CM,Teegarden D,Lyle RM,McCabe GP,McCabe LD,Proulx W,Kern M,Sedlock D,Anderson DD,Hillberry BM,Peacock M,Johnston CC

更新日期：2001-06-01 00:00:00

abstract：:Although estradiol (E2) is considered primarily for its role in reproduction, it can exert numerous physiological actions on a variety of tissues. However, there are several difficulties in isolating these actions and determining its impact for in vivo situations. Despite the limitations, it does appear that E2 can al...

journal_title：Medicine and science in sports and exercise

authors： Bunt JC

更新日期：1990-06-01 00:00:00

abstract：INTRODUCTION AND PURPOSE:Physical inactivity in postmenopausal women contributes to a rise in atherogenic risk factors associated with the metabolic syndrome. Although regular physical activity positively contributes to health, inactivity progressively increases with age. The Dose Response to Exercise in Women aged 45-...

journal_title：Medicine and science in sports and exercise

authors： Morss GM,Jordan AN,Skinner JS,Dunn AL,Church TS,Earnest CP,Kampert JB,Jurca R,Blair SN

更新日期：2004-02-01 00:00:00

abstract：PURPOSE:Although several studies have shown that immune cells stimulated by in vitro stress are capable to produce neurotrophins, there is still no evidence whether physiological stress, such as exercise, can modulate the in vivo levels of brain-derived neurotrophic factor (BDNF) in peripheral blood mononuclear cells (...

journal_title：Medicine and science in sports and exercise

authors： Brunelli A,Dimauro I,Sgrò P,Emerenziani GP,Magi F,Baldari C,Guidetti L,Di Luigi L,Parisi P,Caporossi D

更新日期：2012-10-01 00:00:00

abstract：INTRODUCTION:Interval exercise training can elicit physiological adaptations similar to those of traditional endurance training, but with reduced time. However, the intense nature of specific protocols, particularly the "all-out" efforts characteristic of sprint interval training (SIT), may be perceived as being aversi...

journal_title：Medicine and science in sports and exercise

authors： Stork MJ,Kwan MY,Gibala MJ,Martin Ginis KA

更新日期：2015-05-01 00:00:00

abstract：:Changes in body composition, fat distribution and lipoprotein lipids in response to weight loss elicited by a 10-month program of hypocaloric diet (HD) therapy alone or combined with aerobic exercise training (AEX+HD) were examined in sedentary obese older males. Body composition was assessed by hydrodensitometry and ...

journal_title：Medicine and science in sports and exercise

authors： Dengel DR,Hagberg JM,Coon PJ,Drinkwater DT,Goldberg AP

更新日期：1994-11-01 00:00:00

abstract：PURPOSE:Studies have shown that the classical sit-and-reach (CSR) test, the modified sit-and-reach (MSR), and the newly developed back-saver sit-and-reach (BS) test have poor criterion-related validity in estimating low-back flexibility but yielded moderate criterion-related validity in hamstring flexibility. The V sit...

journal_title：Medicine and science in sports and exercise

authors： Hui SS,Yuen PY

更新日期：2000-09-01 00:00:00

abstract：:This study investigated in rather specific wheelchair tests the relationships among estimates of isometric upper-body strength (Fiso), sprint power (P30), aerobic power (VO2peak), and maximal power output (POaer) in a group of 44 men (age 34 +/- 12 yr) with longstanding spinal cord injuries ranging from C4/C5 to L5. F...

journal_title：Medicine and science in sports and exercise

authors： Janssen TW,van Oers CA,Hollander AP,Veeger HE,van der Woude LH

更新日期：1993-07-01 00:00:00

abstract：PURPOSE:To determine whether lactate profiling could detect changes in discrete aspects of endurance fitness in world-ranked swimmers during a season. METHODS:Eight male and four female Australian National Team swimmers aged 20--27 yr undertook a 7 x 200-m incremental swimming step test on four occasions over an 8-mon...

journal_title：Medicine and science in sports and exercise

authors： Pyne DB,Lee H,Swanwick KM

更新日期：2001-02-01 00:00:00

abstract：PURPOSE:Physical activity questionnaires (PAQs) are considered the most cost-efficient method to estimate total energy expenditure (TEE) in epidemiological studies. However, relatively few PAQs have been validated using doubly labeled water (DLW) in women or in samples with diverse ethnic backgrounds. This study was co...

journal_title：Medicine and science in sports and exercise

authors： Staten LK,Taren DL,Howell WH,Tobar M,Poehlman ET,Hill A,Reid PM,Ritenbaugh C

更新日期：2001-11-01 00:00:00

abstract：PURPOSE:Ultraendurance exercise is steadily growing in popularity; however, the effect of increasingly prolonged durations of exercise on the vascular endothelium is unknown. The aim of this study was to characterize the effect of various ultramarathon running distances on vascular form and function. METHODS:We evalua...

journal_title：Medicine and science in sports and exercise

authors： King TJ,Coates AM,Tremblay JC,Slysz JT,Petrick HL,Pignanelli C,Millar PJ,Burr JF

更新日期：2020-08-15 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

authors： Pate RR,McIver KL,Dowda M,Schenkelberg MA,Beets MV,Distefano C

更新日期：2018-06-01 00:00:00

abstract：PURPOSE:This study examined the direct, moderating, and indirect effects of dispositional optimism on the prediction of, and athletes' responses to, injury. METHODS:A 2-yr longitudinal design was conducted with a baseline sample of 694 asymptomatic participants (389 men, 305 women; mean ± SD age = 19.17 ± 1.69 yr), 10...

journal_title：Medicine and science in sports and exercise

authors： Wadey R,Evans L,Hanton S,Neil R

更新日期：2013-02-01 00:00:00

abstract：PURPOSE:To examine the relationship between variable lower-limb coordination and shoulder joint kinetics and kinematics in the high-performance flat first serve in tennis. METHODS:Three-dimensional data describing three flat serve (FS) techniques, each executed with varying lower-limb involvement: foot-up (FU), foot-b...

journal_title：Medicine and science in sports and exercise

authors： Reid M,Elliott B,Alderson J

更新日期：2008-02-01 00:00:00

abstract：:Although hyponatremia (HN) has been reported among endurance athletes, its etiology often remains uncertain and of great interest to clinicians and physiologists. This case report presents physiologic evidence regarding the etiology and development of HN during exercise in the heat. A 21-yr-old male volunteer (K.G.) u...

journal_title：Medicine and science in sports and exercise

authors： Armstrong LE,Curtis WC,Hubbard RW,Francesconi RP,Moore R,Askew EW

更新日期：1993-05-01 00:00:00

abstract：:A group of 103 female weight lifters (WL) and 92 control (C) women answered a survey concerning eating behavior and attitudes (including the Eating Disorder Inventory) and menstrual function. The incidence of menstrual dysfunction, defined as oligomenorrhea plus amenorrhea, was significantly higher for the WL (30%) th...

journal_title：Medicine and science in sports and exercise

authors： Walberg JL,Johnston CS

更新日期：1991-01-01 00:00:00

abstract：INTRODUCTION:Physical endurance can be limited by muscle glycogen stores, in that glycogen depletion markedly reduces external work. During carbohydrate restriction, the liver synthesizes the ketone bodies, D-β-hydroxybutyrate, and acetoacetate from fatty acids. In animals and in the presence of glucose, D-β-hydroxybut...

journal_title：Medicine and science in sports and exercise

authors： Holdsworth DA,Cox PJ,Kirk T,Stradling H,Impey SG,Clarke K

更新日期：2017-09-01 00:00:00

abstract：PURPOSE:The purpose of this study was to examine the ability of the YMCA submaximal exercise test protocol using a total body recumbent stepper to predict V˙O(2peak). METHODS:Of 112 individuals initially screened, 110 individuals with low to moderate cardiovascular disease risk met the inclusion criteria for participa...

journal_title：Medicine and science in sports and exercise

authors： Billinger SA,VAN Swearingen E,McClain M,Lentz AA,Good MB

更新日期：2012-08-01 00:00:00