Search Results
Results 351 - 400 of 999
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Goldfield Gary S - - 2012
OBJECTIVES: To evaluate effects of stationary cycling to music versus interactive video game cycling on psychosocial functioning in obese adolescents. METHODS: 30 obese adolescents aged 12-17 years were randomized to twice weekly laboratory-based sessions of stationary cycling to music or interactive video game cycling for a 10-week trial. Participant's self-reported ...
Boushel Robert - - 2012
Muscle mitochondrial respiratory capacity measured ex-vivo provides a physiological reference to assess cellular oxidative capacity as a component in the oxygen cascade in-vivo. In this review, the magnitude of muscle blood flow and oxygen uptake during exercise involving a small-to-large fraction of the body mass will be discussed in relation ...
Gonzales Joaquin U - - 2012
Previous studies have demonstrated that carbonic anhydrase inhibition with acetazolamide reduces exercise capacity. The mechanism responsible for this early fatigue is unclear, but may be partly mediated by impaired respiratory muscle function. Inspiratory muscle strength and endurance were assessed in seven healthy men (age 28±5 yrs,±SD) by measuring maximal inspiratory ...
Peñailillo Luis - - 2012
To better understand characteristics of neuromuscular fatigue in supramaximal cycling exercise, this study examined changes in surface electromyography (sEMG) frequency during maximal voluntary isometric contractions (MVC) following a 30-s Wingate anaerobic test (WAnT) using discrete wavelet transform (DWT). The changes in sEMG were also compared between DWT and mean frequency ...
Haile Luke - - 2012
The purpose of this investigation was to describe the just noticeable difference (JND) in perceived exertion during cycle exercise. Males (n = 20) and females (n = 26) (21.4 ± 3.1 year) performed load-incremented cycle exercise to peak intensity. At the end of each minute, subjects rated their overall-body perceived exertion using the OMNI (0-10) rating of ...
McLean Blake D - - 2012
The purpose of this study was to investigate how maximal power output (PMAX), as measured via the inertial load cycling technique, changes throughout a collegiate soccer season in relation to training load completed. The current investigation took place throughout the 2010 Big XII soccer season. Nineteen Division I female collegiate ...
Joyce Sarah - - 2012
ABSTRACT: We examined the effect of long-term oral contraceptive (OC) use on endurance performance in recreationally-active women. Eight women using OC (OC group) and eight women who were non-users (CON group) performed a test to determine peak oxygen uptake for cycling (V[Combining Dot Above]O2peak) and estimate the anaerobic threshold (AT). ...
Driller Matthew W - - 2012
PURPOSE: Compression garments have been commonly used in a medical setting as a method to promote blood flow. Increases in blood flow during exercise may aid in the delivery of oxygen to the exercising muscles and subsequently, enhance performance. The aim of the current study was to investigate the effect ...
Higgins Linda W LW Schools of Medicine and Nursing, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA. - - 2013
Prescribing exercise at intensities that improve fitness is difficult in children with cystic fibrosis (CF) due to ventilatory limitations and fluctuating health status. Our aim was to determine if children with CF could regulate the intensity of cycle ergometer and treadmill exercise using target ratings of perceived exertion (RPE) derived ...
Stemplewski Rafal - - 2012
The aim of the study was to compare the effect of exercise on postural control (PC) among the elderly with lower or higher level of habitual physical activity (HPA). The study involved 17 elderly men (mean age 72.9 ± 4.79 years). Mean velocity of the center of pressure (COP) displacements ...
Beaven Christopher Martyn - - 2012
Repeated cycles of vascular occlusion followed by reperfusion initiate a protective mechanism that acts to mitigate future cell injury. Such ischemic episodes are known to improve vasodilation, oxygen utilization, muscle function, and have been demonstrated to enhance exercise performance. Thus, the use of occlusion cuffs represents a novel intervention that ...
Hirschhorn Andrew D AD Westmead Private Physiotherapy Services, NSW, Australia. - - 2012
The purpose of this study was to compare the effectiveness of moderate-intensity stationary cycling and walking exercise programmes in the early postoperative period after first-time coronary artery bypass graft surgery. In this prospective trial, 64 patients (57 men, 7 women, mean age = 66 ± 9 years) performed twice daily, ...
Bachasson Damien - - 2012
OBJECTIVE: To assess quadriceps strength and fatigability by using femoral nerve magnetic stimulation (FNMS) and its relationship with exercise capacity in patients with fibromyalgia syndrome (FMS) and healthy controls. METHODS: 22 women (11 FMS, 11 controls) performed a maximal incremental cycling test and a quadriceps fatigue test on two separated ...
Demachi Koichi - - 2012
To clarify the influence of internal and skin temperature on the active cutaneous vasodilation during exercise, the body temperature thresholds for the onset of active vasodilation during light or moderate exercise under different ambient temperature conditions were compared. Seven male subjects performed 30 min of a cycling exercise at 20 % or ...
Kurayama Taichi - - 2012
BACKGROUND: Trainings of the kneeling position, such as standing exercise on the knees and kneeling gait, have been anecdotally used in physical therapy to improve postural control of patients with various pathological conditions. However, clinical evidence is lacking and the movement characteristics of these kneeling trainings have not been well ...
Aziz Abdul Rashid - - 2012
This study examines the effects of Ramadan fasting on performance during an intense exercise session performed at three different times of the day, i.e., 08:00, 18:00, and 21:00 h. The purpose was to determine the optimal time of the day to perform an acute high-intensity interval exercise during the Ramadan fasting ...
Faulkner Steve H - - 2012
PURPOSE: This study aimed to determine the effect of passive insulation versus external heating during recovery following a sprint specific warm up on thigh muscle temperature and subsequent maximal sprint performance. METHODS: On three separate occasions, 11 male cyclists (age 24.7 ± 4.2 years, height 1.82 ± 0.72m, body mass ...
Elmer Steven J - - 2012
Eccentric cycling serves a useful exercise modality in clinical, research, and sport training settings. However, several constraints can make it difficult to utilize commercially available eccentric cycle ergometers. In this technical note, we describe the process by which we built an isokinetic eccentric cycle ergometer using exercise equipment modified with ...
Kang Suk Y - - 2012
OBJECTIVE: To investigate whether hand muscle repetitive use reduces surround inhibition (SI) as observed in patients with focal hand dystonia, we performed a transcranial magnetic stimulation (TMS) study in 15 healthy right-handed volunteers. METHODS: TMS was set to be triggered by self-initiated flexion of the index finger at 3ms after ...
Arends Julie C - - 2012
Functional hypothalamic amenorrhea is common among female athletes and may be difficult to treat. Restoration of menses (ROM) is crucial to prevent deleterious effects to skeletal and reproductive health. To determine the natural history of menstrual disturbances in female college athletes managed with nonpharmacologic therapies including increased dietary intake and/or ...
Taylor Lee - - 2012
HSP72 is rapidly expressed in response to a variety of stressors in vitro and in vivo (including hypoxia). This project sought a hypoxic stimulus to elicit increases in HSP72 and HSP32 in attempts to confer protection to the sub-maximal aerobic exercise-induced disturbances to redox balance. Eight healthy recreationally active male ...
Arends Julie C - - 2012
BACKGROUND. Functional hypothalamic amenorrhea is common among female athletes and may be difficult to treat. Restoration of menses (ROM) is crucial to prevent deleterious effects to skeletal and reproductive health. OBJECTIVE. To determine the natural history of menstrual disturbances in collegiate female athletes managed with nonpharmacologic therapies, including increased dietary ...
Argus Christos K - - 2012
PURPOSE: To evaluate the effectiveness of different recovery strategies on repeat cycling performance where a short duration between exercise bouts is required. METHODS: Eleven highly-trained cyclists (mean ± SD; age = 31 ± 6 years; mass = 74.6 ± 10.6 kg; height = 180.5 ± 8.1 cm) completed four trials ...
Krantz Mori J - - 2012
Among psychiatric conditions, anorexia nervosa carries the highest mortality, in part due to the propensity for rhythm disturbances among patients with advanced disease. Patients with anorexia nervosa are prone to both bradycardia and tachyarrhythmias, though mortality has not been associated with the former. To date, only one case of junctional ...
Schindelholz Matthias - - 2012
Robotics-assisted treadmill exercise has potential for cardiovascular rehabilitation of patients with miscellaneous neurological deficits. A novel approach is presented here which suggests using heart rate to define and control exercise intensity during robotics-assisted treadmill exercise. The work delineates the design and provides technical validation of the new method. A feedback ...
Ichinose Takashi - - 2012
Not only increasing body carbohydrate (CHO) stores before exercise but also suppressing CHO oxidation during exercise is important for improving endurance performance. We tested the hypothesis that intensive high-fat ingestion in the early stage of recovery from exercise training (ET) for 2 d would suppress CHO oxidation during exercise by ...
Stepto Nigel K - - 2012
Reduced activation of exercise responsive signalling pathways have been reported in response to acute exercise after training; however little is known about the adaptive responses of the mitochondria. Accordingly, we investigated changes in mitochondrial gene expression and protein abundance in response to the same acute exercise before and after 10-d ...
Powell Thomas - - 2012
The resistive work of breathing against an external load during inspiration (WR(I)) was measured at the mouth, during sub-maximal exercise in healthy participants. This measure (which excludes the elastic work component) allows the relationship between resistive work and power, ventilation and exercise modality to be explored. A total of 45 ...
Petrovic Milos - - 2012
Dynamic hyperinflation has important clinical consequences in patients with chronic obstructive pulmonary disease (COPD). Given that most of these patients have respiratory and peripheral muscle weakness, dyspnea and functional exercise capacity may improve as a result of inspiratory muscle training (IMT). The aim of the study was to analyze the ...
Matsuo Tomoaki - - 2012
The purpose of this study was to reveal any association between cardiorespiratory fitness level and excess post-exercise oxygen consumption (EPOC) using three cycling protocols with varying degrees of exercise intensity, i.e., sprint interval training (SIT), high-intensity interval aerobic training (HIAT), and continuous aerobic training (CAT). Ten healthy men, aged 20 ...
Brugnara Laura - - 2012
The beneficial effects of exercise in patients with type 1 diabetes (T1D) are not fully proven, given that it may occasionally induce acute metabolic disturbances. Indeed, the metabolic disturbances associated with sustained exercise may lead to worsening control unless great care is taken to adjust carbohydrate intake and insulin dosage. ...
Burns Patricia - - 2012
To investigate whether exergaming satisfies guideline-based intensity standards for exercise conditioning (40%/50% oxygen uptake reserve [VO2R] or heart rate reserve (HRR), or 64%/70% of peak heart rate [HRpeak]) in persons with paraplegia. Nine men and women (18-65 years old) with chronic paraplegia (T1-L1, AIS A-C) underwent intensity-graded arm cycle exercise ...
Hackney Kyle J - - 2012
Prolonged exposure to microgravity results in chronic physiological adaptations including skeletal muscle atrophy, cardiovascular deconditioning, and bone demineralization. To attenuate the negative consequences of weightlessness during spaceflight missions, crewmembers perform moderate- to high-load resistance exercise in conjunction with aerobic (cycle and treadmill) exercise. Recent evidence from ground-based studies suggests that ...
Fleming Neil N Physiology - - 2012
The current study compared EMG, stroke force and 2D kinematics during on-ergometer and on-water kayaking. Male elite flatwater kayakers (n = 10) performed matched exercise protocols consisting of 3 min bouts at heart and stroke rates equivalent to 85% of VO2peak (assessed by prior graded incremental test). EMG data were ...
Filingeri Davide - - 2012
Whole Body Vibration training is studied and used in different areas, related to sport performance and rehabilitation. However, few studies have investigated the effects of Vibration (Vib) exposure on aerobic performance through the application of this concept to cycling exercise. A specifically designed vibrating cycloergometer, the powerBIKE(™), was used to ...
Ozyener Fadil - - 2012
Oxygen uptake (VO2) kinetics during moderate constant-workrate (WR) exercise (>lactate-threshold (θL)) are well described as exponential. AboveθL, these kinetics are more complex, consequent to the development of a delayed slow component (VO2sc), whose aetiology remains controversial. To assess the extent of the contribution to the VO2sc from arm muscles involved ...
Baig Dur-e-Zehra DE School of Electrical Engineering and Telecommunications, the University of New South Wales, Sydney, NSW 2052, Australia. - - 2012
The aim of this paper is to develop estimator that can predict oxygen consumption (V(O2)) during cycling and rowing exercises, by using non-invasive and easily measurable quantities such as heart rate (HR), respiratory rate (RespR) and frequency of exercising activity. The frequency of exercise is quantified as a universal measure ...
Nagata T T Graduate School of Science and Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. - - 2012
The goal of this study is to maintain a continuous level of exercise intensity around the aerobic threshold (AT) during riding on an electric motor assisted bicycle using a new control system of electrical motor assistance which uses the efficient pedaling rate of popular bicycles. Five male subjects participated in ...
Sugita Norihiro N Department of Management Science and Technology, Graduate School of Engineering, Tohoku University, Sendai 980-8578, Japan. sugita@yoshizawa.ecei. - - 2012
A cycling wheel chair (CWC) is a useful tool to provide physical exercise for patients who face difficulty walking, caused by stroke or other brain disorders. A system has been developed for rehabilitation, which allows patients to practice driving a CWC in a virtual environment. In this study, hardware improvements ...
Gocentas Audrius - - 2011
The purpose of this study was to examine possible differences in cardio respiratory functional capacity between perimeter and post elite basketball players. The subjects included 42 highly trained basketball players subdivided into groups of perimeter and post players. Point guards, shooting guards and small forwards were involved in the group ...
Schulte Stefanie - - 2011
The calcium-binding protein S100B is produced primarily by astrocytes and exerts concentration-dependent paracrine and autocrine effects on neurons and glia. The numerous findings of a correlation between S100B and traumatic brain injury (TBI) have resulted in the employment of this protein as a clinical biomarker for such injury. Our present ...
Vishnupriya R - - 2011
The purpose of this study is to analyze the potential benefits of aerobic exercises at different intensities in the management of pre menstrual syndrome. The study design is quasi-experimental; sixty-one female subjects were randomly allocated into three groups, Group A (mild intensity), Group B (moderate intensity) and Group C (severe ...
Sun Xing-Guo - - 2012
The responses of oxygen uptake efficiency (ie, oxygen uptake/ventilation = VO(2)/VE) and its highest plateau (OUEP) during incremental cardiopulmonary exercise testing (CPET) in patients with chronic left heart failure (HF) have not been previously reported. We planned to test the hypothesis that OUEP during CPET is the best single predictor ...
Brasil Roxana M - - 2011
The present study tested the hypothesis that the exercise protocol (continuous vs. intermittent) would affect the physiological response and the perception of effort during aquatic cycling. Each protocol was divided on four stages. Heart rate, arterial blood pressure, blood lactate concentration, central and peripheral rate of perceived exertion were collected ...
Duraković Zijad - - 2011
The paper deals with the sudden cardiac death during training in male athletes in Croatia. The data are a part of a retrospective study dealing with 67 sudden death due to physical activity in men in Croatia during 25 years: from January 1, 1986 to December 31, 2010. Two of ...
Chan Albert K - - 2011
Treadmill exercise capacity in resting metabolic equivalents (METs) and stress hemodynamic, electrocardiographic (ECG), and myocardial perfusion imaging (MPI) responses are independently predictive of adverse clinical events. However, limited data exist for arm ergometer stress testing (AXT) in patients who cannot perform leg exercise because of lower extremity disabilities. We sought ...
Fujii Takako - - 2011
Resistance exercise increases heme synthesis in the bone marrow, but it does not improve the hemoglobin status in severe iron-deficient rats on a diet containing less than 5 mg iron/kg. The current study investigated whether resistance exercise could mitigate hemoglobin status via increasing heme synthesis in moderately iron-deficient rats. Male 4-week-old ...
Kasturi Gopi C - - 2011
Osteoporosis is a chronic disorder of the skeleton causing increased bone fragility and fractures. In the second of our 3-part series, we discuss the beneficial effects of nonpharmacologic agents in the management of osteoporosis. We review the evidence supporting the use of exercise, whole-body vibration, hip protectors, low-intensity pulsed ultrasound, ...
Singh Tajinder P - - 2011
: The period of early recovery after exercise is characterized by a rapid payback of the oxygen debt incurred during exercise. The purpose of this study was to test the hypothesis that the oxygen consumption (V˙O2) decline during the first minute of recovery after exercise will be faster in children ...
Maurel Delphine B - - 2011
Chronic alcohol consumption may be deleterious for bone tissue depending on the amount of ethanol consumed, whereas physical activity has positive effects on bone. This study was designed to analyze the effects of moderate alcohol consumption on bone in trained rats. 48 male Wistar rats were divided into four groups: ...
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