Search Results
Results 251 - 300 of 1513
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Vincent Graser Susan - - 2011
Researchers have noted both the utility and limitations of using pedometers to measure physical activity (PA). While these unobtrusive devices are widely accepted for their ability to measure accumulated PA, they have been criticized for their inability to measure exercise intensity. However, recent steps-per-minute (SPM) research provides reasonably accurate measures ...
Suprak David N - - 2011
Suprak, DN, Dawes, J, and Stephenson, MD. The effect of position on the percentage of body mass supported during traditional and modified push-up variants. J Strength Cond Res 25(2): 497-503, 2011-The push-up is a popular upper-extremity weight-bearing exercise. However, limited information is available regarding its effectiveness. Much of the past ...
Huang Juliet S - - 2011
Huang, JS, Pietrosimone, BG, Ingersoll, CD, Weltman, AL, and Saliba, SA. Sling exercise and traditional warm-up have similar effects on the velocity and accuracy of throwing. J Strength Cond Res 25(X): 000-000, 2011-Throwing is a complex motion that involves the entire body and often puts an inordinate amount of stress ...
Mizuno Masaki - - 2011
We examined the transfer function of autonomic heart rate (HR) control in anesthetized sedentary and exercise trained (16 weeks, treadmill for 1 h, 5 times/wk at 15m/min and 15° grade) rats for comparison to HR variability assessed in the conscious resting state. The transfer function from sympathetic stimulation to HR ...
Lee J K W - - 2011
There are no reported cases of exercise-associated hyponatremia (EAH) in tropical Asia. This study aimed to investigate the incidence of EAH at the on-site medical tent and fluid balance in long distance foot races in a warm and humid environment. Body mass was taken before and after the races (42-km ...
Thiel C - - 2011
The present study evaluated the reproducibility of tissue oxygenation in relation to oxygen consumption (VO (2)) across cycle exercise intensities in a test-retest design. 12 subjects (25.7±2.1 years; 24.7±1.9 kg · m (-2)) twice performed an incremental bicycle exercise protocol, while tissue oxygen saturation (StO (2)) in the vastus lateralis ...
Cirio Serena - - 2011
Background We evaluated the safety and efficacy of a new automatic O₂ regulator device (O₂ Flow Regulator) that titrates automatically the oxygen flow-rate using as a feedback a pulse oximeter to maintain patient's SaO₂ at a target level. Methods Eighteen subjects with chronic lung disease, on long-term oxygen therapy (LTOT) ...
Hunter Gary R - - 2011
PURPOSE:: Purpose of study is to determine whether quadriceps/patella and Achilles tendon length and flexibility of the knee extensors and plantar flexors, are related to walking and running economy. METHODS:: Twenty-one male distance runners were subjects. Quadriceps/patella and Achilles tendon length were measured by magnetic resonance imaging, body composition by ...
Osawa Takuya - - 2011
PURPOSE:: The aim of this study was to investigate the relationship between the attenuation point of muscle deoxygenation (APMD) and the electromyographic threshold (EMGT) during incremental cycling exercise under different fractions of inspired O2 (FIO2). METHODS:: Nine male subjects performed ramp cycling exercise tests (20W·min) to exhaustion under normoxic and ...
Duvnjak-Zaknich Daniel M - - 2011
PURPOSE:: This study examined the effects of acute caffeine ingestion on agility performance and decision-making accuracy following simulated team-sport exercise. METHODS:: Using a randomized, double-blinded, counter-balanced design, ten moderately trained male team-sport athletes ingested either caffeine (6 mg·kg) or placebo (dextrose) 60 min before completing an 80 min (4 × ...
Collett Johnny - - 2011
The most effective exercise dose has yet to be established for multiple sclerosis (MS). The aim of this study was to investigate the effect of different exercise intensities in people with MS. We completed a randomized comparator study of three cycling exercise intensities, with blinded assessment, was carried out in ...
Blacker Sam D - - 2011
Effects of a carbohydrate beverage on the physiological responses to load carriage were examined. Ten fit male participants (age: 28 ± 9 years, body mass: 81.5 ± 10.5 kg, VO(2max): 55.0 ± 5.5 mL kg(-1) min(-1)) completed two test conditions in random order, walking on a treadmill (6.5 km h(-1)) ...
Kipp Kristof - - 2011
Kipp, K, Harris, C, and Sabick, MB. Lower extremity biomechanics during weightlifting exercise vary across joint and load. J Strength Cond Res 25(x): 000-000, 2011-The purpose of this study was to determine the effect of load on lower extremity biomechanics during the pull phase of the clean. Kinematic and kinetic ...
Madden Molly C - - 2011
Recent efforts to establish a role for plasma matrix metalloproteinase-9 (MMP-9) as a marker of exercise-induced muscle damage have been inconsistent. Methodological and experimental design issues have contributed to confusion in this area. The purpose of this study was to use a damaging eccentric arm task to evaluate the relationship ...
de Groot Janke Frederike - - 2011
Background With emerging interest in exercise and lifestyle interventions for children and adolescents with spina bifida, there is a need for appropriate measurements in exercise testing. Objective The purpose of this study was to assess both reliability and agreement of maximal and submaximal exercise measures in "normal ambulatory" and "community ...
Ciurzyński Michał - - 2011
Background: In systemic sclerosis (SSc), changes in the lungs and pulmonary hypertension (PH) are complications most adversely affecting the prognosis. Given the availability of specific treatment, early diagnosis of PH is very important. Exercise echocardiography, by increasing the patient's cardiac output, makes it possible to identify patients with elevated pulmonary ...
Randell Aaron D - - 2011
The purpose of this study was to investigate the effect of instantaneous performance feedback (peak velocity) provided after each repetition of squat jump exercises over a 6-week training block on sport-specific performance tests. Thirteen professional rugby players were randomly assigned to 1 of 2 groups, feedback (n = 7) and ...
Ogawa Kishiko - - 2011
The endolysosome pathway has been proposed for secretion of heat shock protein (Hsp)72 with a regulatory role for extracellular adenosine triphosphate (ATP). Here, we tested the hypothesis that extracellular ATP mediates the increase in plasma Hsp72 after exercise. We measured plasma ATP Hsp72, cathepsin D, norepinephrine, free fatty acid, glucose, ...
Baskurt Oguz K - - 2011
Nitric oxide (NO) is accepted to be an important factor affecting the degree of vascular tone in various portions of the circulation. Until recently, research in this area has focused on endothelial cells as a NO source, and there is general agreement that: 1) the level of wall shear stress ...
Foroughi Nasim - - 2011
we hypothesised that high intensity progressive resistance training would improve lower limb dynamic alignment and function (lower knee adduction moment, increased muscle strength, and fewer knee osteoarthritis symptoms). women (n=54) with osteoarthritis in at least one knee were randomised into a 6-month resistance training or a sham-exercise program. The primary ...
Troy Karen L - - 2011
Purpose. To develop guidelines for proper exercise execution on a novel device and to recommend design changes to the device based on biomechanical data and user feedback. Method. Seven manual wheelchair users were instructed on proper exercise technique with a novel device, which allows a person to complete a seated row. Kinematics ...
Bullani Roberto - - 2011
Although physical activity is recommended in patients on maintenance hemodialysis (MHD), randomized controlled trials testing the effects of exercise in this population have given conflicting results. In general, aerobic exercises mostly failed to produce improvements in physical function, whereas resistance exercises, although less studied, appeared to be more promising. The ...
Negrini Stefano - - 2011
Bracing is an effective strategy for scoliosis treatment, but there is no consensus on the best type of brace, nor on the way in which it should act on the spine to achieve good correction. The aim of this paper is to present the family of SPoRT (Symmetric, Patient-oriented, Rigid, ...
Stock Matt S - - 2011
The purpose of this study was to calculate test-retest reliability statistics for peak barbell velocity during the free-weight bench-press exercise for loads corresponding to 10-90% of the 1-repetition maximum (1RM). Twenty-one healthy, resistance-trained men (mean ± SD age = 23.5 ± 2.7 years; body mass = 90.5 ± 14.6 kg; ...
Shojaei Ebrahim Akhtari - - 2011
Based on the inconsistency of some previous results related to moderate exercise effects on systemic inflammatory responses, this study was conducted to determine the effects of 45 minutes of moderate aerobic cycling on inflammatory markers, interleukin-6 (IL-6), interleukin-10 (IL-10), C-reactive protein (CRP), and leucocyte counts in young active men. Ten ...
Tyler Christopher James - - 2011
Cooling the neck region can improve the ability to exercise in a hot environment. It might improve performance by dampening the perceived level of thermal strain, allowing individuals to override inhibitory signals. To investigate whether the enhanced ability to exercise in a hot environment observed when cooling the neck region ...
Melo Mônica O - - 2011
The understanding of the external mechanics of Pilates exercises and the biomechanics of the joints may guide the prescription of rehabilitation exercises. To evaluate the resistance torque (Γ(R)) during hip extension (HE) exercises performed on the Pilates Cadillac. To perform a biomechanic analysis of the Γ(R) and the weighted mean ...
Wood Laurence R J LR Arthritis Research UK Primary Care Centre, Keele University, Keele, Staffordshire, ST7 8AE, - - 2011
Exercise therapy for knee pain and osteoarthritis remains a key element of conservative treatment, recommended in clinical guidelines. Yet systematic reviews point to only modest benefits from exercise interventions.One reason for this might be that clinical trials tend to use a one-size-fits-all approach to exercise, effectively disregarding the details of ...
Bouchard Claude - - 2011
Low cardiorespiratory fitness is a powerful predictor of morbidity and cardiovascular mortality. In 473 sedentary adults, all whites, from 99 families of the Health, Risk Factors, Exercise Training, and Genetics (HERITAGE) Family Study, the heritability of gains in maximal O(2) uptake (VO(2max)) after exposure to a standardized 20-wk exercise program ...
Dinh N V - - 2010
Limited ankle dorsiflexion passive range of motion (DF PROM) has been associated with lower extremity overuse injuries. Therefore, clinicians often prescribe stretching exercises to increase ankle DF PROM. However, there is limited evidence to indicate if any particular gastrocnemius stretching exercise results in greater improvement in DF PROM. The aim ...
Hostettler S - - 2010
Study design:The study is conducted on the basis of comparative-repeated measures.Objectives:The objective of this study is to assess the reliability of non-invasive cardiac output (CO) measurements in individuals with tetraplegia (TP) at rest and during exercise using Innocor, and to test the hypothesis that CO measurements are less reliable in ...
Ballaz Laurent - - 2010
Purpose. To evaluate the effect and feasibility of a 10-week group aquatic training programme on gait efficiency in adolescents with cerebral palsy (CP). The secondary purpose was to determine the exercise intensity during aquatic training in a heterogeneous group of adolescents with CP and to investigate the impact of the training ...
Cotrim Carlos - - 2010
The development of significant intraventricular gradients (IVGs) during exercise has been described anecdotally in athletes. However, the prevalence and clinical effect of this observation are unclear. In addition, the most appropriate exercise technique (upright vs semisupine) for eliciting IVGs also remains unknown. The present study had 2 main aims: (1) ...
Ganio Matthew S - - 2011
Caffeine (CAF) ingestion may enhance endurance exercise by lowering perceived exertion (RPE) and muscle pain. However, exercise in the heat may be detrimental to performance by increasing RPE and pain. The purpose of this study was to examine if caffeine affects pain and related perceptual responses differently in cool and ...
Shimada Hiroyuki - - 2010
The purpose of this study was to determine the interrelationships between lower limb muscle performance, balance, gait and falls in older people using structural equation modeling. Study participants were two hundred and thirteen people aged 65 years and older (mean age, 80.0±7.1 years), who used day-care services in Japan. The ...
Joshi Sandeep - - 2011
The ideal provocative maneuver in patients with hypertrophic cardiomyopathy (HCM) is a subject of ongoing investigation. Standing is a fundamental activity of daily life. This study examined acquisition of standing, Valsalva, and post-exercise left ventricular outflow tract gradients in HCM. Rest supine, standing, and post-Valsalva gradients were measured in 98 ...
Lee Ling-Ling - - 2011
Estimates of the reliability and validity of the English nine-item Outcome Expectations for Exercise (OEE) scale have been tested and found to be valid for use in various settings, particularly among older people, with good internal consistency and validity. Data on the use of the OEE scale among older Chinese ...
Klika Riggs J - - 2011
Selected physiological responses, including lactate kinetics, to cardiopulmonary exercise testing (CPET) were evaluated among a group of cancer survivors (CS, n = 55) and healthy controls (HC, n = 213). It was uncertain if lactate testing in a group of cancer survivors could provide useful information about training intensity. It was hypothesized that chemotherapy, ...
Willbond S M - - 2010
The limited potential of exercise to induce weight loss could be partly due to the overestimation of the energy cost of exercise. The objectives of this study were twofold: 1) to investigate whether men and women are able to accurately estimate exercise energy expenditure (EE); and 2) to determine whether ...
Youdas James W - - 2010
This study compared a conventional pull-up and chin-up with a rotational exercise using Perfect·Pullup™ twisting handles. Twenty-one men (24.9 ± 2.4 years) and 4 women (23.5 ± 1 years) volunteered to participate. Electromyographic (EMG) signals were collected with DE-3.1 double-differential surface electrodes at a sampling frequency of 1,000 Hz. The ...
Ganio Matthew S - - 2011
It is well established that caffeine ingestion during exercise enhances endurance performance. Conversely, the physiological and psychological strain that accompanies increased ambient temperature decreases endurance performance. Little is known about the interaction between environmental temperature and the effects of caffeine on performance. The purpose of this study was to compare ...
Schoenfeld Brad J - - 2010
The squat is one of the most frequently used exercises in the field of strength and conditioning. Considering the complexity of the exercise and the many variables related to performance, understanding squat biomechanics is of great importance for both achieving optimal muscular development as well as reducing the prospect of ...
Farinatti P T V - - 2010
Exercise effects in subjects with HIV/AIDS are not entirely understood. The study aimed to investigate the effects of a supervised exercise program on the physical fitness and immunological function of HIV-infected subjects. Twenty-seven highly active antiretroviral therapy treated HIV-infected patients (age: 45±2 years; CD4-T: 21.3±2.2%) were assigned to a control ...
Nichols Jeanne F - - 2010
There is a growing need to accurately assess exercise energy expenditure (EEE) in athletic populations that may be at risk for health disorders because of an imbalance between energy intake and energy expenditure. The Actiheart combines heart rate and uniaxial accelerometry to estimate energy expenditure above rest. The authors' purpose ...
Sanjak Mohammed - - 2010
To determine the feasibility, tolerability, safety, and exercise treatment-effect size of repetitive rhythmic exercise mediated by supported treadmill ambulation training (STAT) for patients with amyotrophic lateral sclerosis (ALS). Interventional with repeated-measures design. Multidisciplinary ALS clinic at academic medical center. Convenience sample of patients with ALS (N=9) who were ambulatory with ...
Astorino Todd A - - 2010
Studies provide equivocal results regarding the ergogenic properties of caffeine during high-intensity exercise. The primary aim of this study was to examine the effects of two doses of caffeine on peak/average torque, power output, and total work of the knee extensors and flexors during two bouts of high-intensity exercise. Fifteen ...
Mauger Alexis R - - 2010
INTRODUCTION:: The traditional VO2max protocol has received criticism for being an unnatural form of exercise, lacking ecological validity and producing different VO2max responses depending on protocol duration and work rate increments. PURPOSE:: The purpose of this investigation was to design and test a new VO2max protocol that allowed subjects to ...
Fulco Charles S - - 2011
There is an expectation that repeated daily exposures to normobaric hypoxia (NH) will induce ventilatory acclimatization and lessen acute mountain sickness (AMS) and the exercise performance decrement during subsequent hypobaric hypoxia (HH) exposure. However, this notion has not been tested objectively. Healthy, unacclimatized sea-level (SL) residents slept for 7.5 h ...
Yamaguti Wellington Pereira dos Santos - - 2010
To compare the diaphragmatic mobility of healthy subjects during incentive spirometry with a volume-oriented device, during incentive spirometry with a flow-oriented device, and during diaphragmatic breathing. To compare men and women in terms of diaphragmatic mobility during these three types of breathing exercises. We evaluated the pulmonary function and diaphragmatic ...
Mora-Rodriguez Ricardo - - 2010
The purpose of this study was to determine if in a hot-dry environment, racewalking increases intestinal temperature (T(int)) above the levels observed when running either at the same velocity or at a similar rate of heat production. Nine trained racewalkers exercised for 60 min in a hot-dry environment (30.0 ± 1.4°C; 33 ± 8% relative ...
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