Search Results
Results 251 - 300 of 978
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Mahe G - - 2013
Cardiovascular diseases are often revealed during exercise and are associated with cutaneous blood flow (CBF) dysfunction. Studies of CBF during exercise are consequently of interest. Laser speckle contrast imaging (LSCI) allows for non-contact and real-time recording of CBF at rest. We tested whether LSCI could allow the study of CBF ...
Lima-Silva A E - - 2013
We examined the pacing strategy and the magnitude of the end spurt during a 200-kJ cycling time trial performed 12-14 h after an exercise protocol designed to reduce muscle glycogen content. 9 physically-active men performed 5 familiarization sessions and 2 experimental 200-kJ time trials in either a control condition (CON) or ...
Ohya T - - 2013
We compared the effect of recovery condition and durations on performance and muscle oxygenation during short-duration intermittent sprint exercise. 8 subjects performed a graded test and ten 5-s maximal sprints with 25-, 50-, and 100-s passive recovery (PR) or active recovery (AR) on a cycle ergometer. Peak power and percent ...
Black Christopher D - - 2013
OBJECTIVES:: This study examined the effects of exercise-induced muscle damage (EIMD) on the physiological and perceptual responses to 30 minutes of submaximal cycling at 60% of oxygen consumption (VO2 peak). METHODS:: Ten participants completed two 30-minute bouts of cycling, one before and one 48 hours after performance of strenuous (24 ...
Higgins Matthew F - - 2013
Abstract Ten healthy, non-cycling trained males (age: 21.2 ± 2.2 years, body mass: 75.9 ± 13.4 kg, height: 178 ± 6 cm, [Vdot]O(2PEAK): 46 ± 10 ml · kg(-1) · min(-1)) performed a graded incremental exercise test, two familiarisation trials and six experimental trials. Experimental trials consisted of cycling to volitional exhaustion at 100%, 110% and 120% W(PEAK), 60 min after ingesting either 0.3 g · kg(-1) body mass ...
Hughes Jonathan - - 2013
Abstract This study investigated whether exercise-induced muscle damage (EIMD) resulted in changes to whole-body substrate utilisation during exercise performed during the subsequent 48 hours. Eight males (31±6 years) performed 30 minutes of bench-stepping exercise. One leg performed eccentric contractions (Ecc) by lowering the body whilst the control leg performed concentric ...
Freese Eric C - - 2013
ABSTRACT: Sprint interval training has been shown to improve skeletal muscle oxidative capacity, maximal oxygen uptake and health outcomes. However, the acute physiological responses to 4-7 maximal effort intervals have not been determined. To determine the oxygen uptake, cardiorespiratory responses, and energy expenditure during an acute bout of sprint interval ...
Hornsby Jared - - 2013
ABSTRACT: Session RPE (SRPE), a convenient model for monitoring the overall perceived exertion of an exercise bout is not well-understood. SRPE may be linked with final acute RPE prior to exercise cessation. This study investigated the potential link between terminal acute RPE (TRPE) and SRPE using cycling trials of equated ...
Fernandes Ricardo J - - 2013
Pinna et al. (J Physiol Sci, 10.1007/s12576-012-0226-7, 2012) showed that a tethered swimming incremental protocol leads to higher maximal oxygen consumption values than during cycle ergometer and arm-crank tests, and evidenced that anaerobic threshold occurred at higher workloads during swimming comparing to other types of exercise. This is an interesting ...
O'Neal Eric K - - 2013
This study compared the effects of ingesting water (W), a flavored carbohydrate-electrolyte (CE) or a flavored non-caloric electrolyte (NCE) beverage on mood, ratings of perceived exertion (RPE), and sprint power during cycling in recreational exercisers. Men (n = 23) and women (n = 13) consumed a 24-h standardized diet and reported 2-4 h ...
Jin Hong - - 2013
Using heart rate recovery (HRR) after exercise as an index of autonomic function, we evaluate the effects of aerobic cycling training on HRR and cardiovascular fitness (peak VO2) in chronic stroke patients and investigate the relationship between changes in HRR and those in peak VO2. 128 participants with chronic stroke ...
Gadi Nikhita - - 2013
This Teaching Resource provides and describes a two-part classroom exercise to help students understand control of the cell cycle, with a focus on the transcription factor p53, the E3 ubiquitin ligase Mdm2, the Mdm2 inhibitor ARF, the kinases ATM and ATR, the kinase Chk2, and the cell cycle inhibitor p21(Cip1). ...
Hagen Jana - - 2013
Music is widely used as an ergogenic aid in sport, but there is little evidence of its effectiveness during closed-loop athletic events. In order to determine the effectiveness of music as an ergogenic aid, well-trained and task-habituated cyclists performed 10-km cycle time trials either while listening to self-selected motivational music ...
Jones Andrew M - - 2013
Several recent studies indicate that supplementation of the diet with inorganic nitrate results in a significant reduction in pulmonary O2 uptake during sub-maximal exercise, an effect that appears to be related to enhanced skeletal muscle efficiency. The physiological mechanisms responsible for this effect are not completely understood but are presumably ...
Kałka Dariusz - - 2013
In addition to a beneficial effect on exercise tolerance and an associated reduction of global cardiovascular risk, modificationof physical activity has a positive effect on the quality of life, reducing, among other things, the severity of erectile dysfunction (ED). The specific nature of sexual activity, which combines the need to ...
Weiss Harold - - 2013
After a spate of recent New Zealand cyclist deaths, cycle advocates and several policy makers have been pondering the issue of increased penalties aimed at drivers deemed at fault. A key question is whether vulnerable road users (VRUs), including pedestrians, workers, animal riders, stranded motorists, skateboarders, cyclists, and others, are ...
Segizbaeva M O - - 2013
The aim of this study was to characterize the pattern of inspiratory muscle fatigue and to assess the resistance to fatigue of the diaphragm (D), parasternal (PS), sternocleidomastoid (SCM), and scalene (SC) muscles. Nine healthy, untrained male subjects participated in this study. Electromyographic activity (EMG) of D, PS, SCM, and ...
Gerz Erwin - - 2013
Near-infrared spectroscopy (NIRS) is widely used for the measurement of skeletal muscle oxygenation during exercise as it reflects muscle metabolism, and most studies report a large variability between subjects. Here we assess the data quality of tissue oxygen saturation (SO2) and oxygenated (oxyHb) and deoxygenated (deoxyHb) haemoglobin concentrations recorded during ...
Rupp Thomas - - 2013
This study aimed to compare changes in skeletal muscle, prefrontal (PFC), and motor (MC) cortex hemodynamics during prolonged (i.e., 4-h) fatiguing whole-body exercise using multichannel near-infrared spectroscopy (NIRS). Ten subjects completed three successive 80-min cycling bouts at 45 % of their maximal power output. After the 4-h cycling, maximal voluntary ...
Takagi Shun - - 2013
We compared muscle oxygen saturation (SmO2) responses in several leg muscles and within a single muscle during ramp cycling exercise between elderly men (n = 8; age, 65 ± 3 years; ELD) and young men (n = 10; age, 23 ± 3 years; YNG). SmO2 was monitored at the distal ...
Kime Ryotaro - - 2013
Recently, deoxygenated hemoglobin (HHb) has been used as one of the most popular indicators of muscle O2 extraction during exercise in the field of exercise physiology. However, HHb may not sufficiently represent muscle O2 extraction, as total hemoglobin (tHb) is not stable during exercise. The purpose of this study was ...
Koglin Laurent - - 2013
Opioid receptors are possibly involved in the perception of exertion and the ventilatory response to exercise. We compared incremental cycling exercise in conditions of normoxia and hypoxia (11% O2) after injection of the opioid receptor antagonist naloxone (30 mg i.v.) or placebo. Naloxone was expected to increase sensation of breathing ...
Finkelstein Joseph - - 2013
Inexpensive cycling equipment is widely available for home exercise however its use is hampered by lack of tools supporting real-time monitoring of cycling exercise in elderly and coordination with a clinical care team. To address these barriers, we developed a low-cost mobile system aimed at facilitating safe and effective home-based ...
Aoi Wataru - - 2013
Background: MicroRNAs (miRNAs) are small non-coding RNAs involved in post-transcriptional gene regulation. miRNAs are taken in by intracellular exosomes, secreted into circulation, and taken up by other cells, where they regulate cellular functions. We hypothesized that muscle-enriched miRNAs existing in circulation mediate beneficial metabolic responses induced by exercise. To test ...
Simmonds Michael J - - 2013
The effect of exercise-induced lactate production on red blood cell deformability and other blood rheological changes is controversial, given heavy-exercise induces biochemical processes (e.g., oxidative stress) known to perturb haemorheology. The aim of the present study was to examine the haemorheological response to a short-duration cycling protocol designed to increase ...
Buśko Krzysztof - - 2013
The purpose of this study was to investigate the relationship between somatotype, muscle torque, maximal power output and height of rise of the body mass centre measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), and power output measured in maximal cycle ergometer exercise ...
Silva-Cavalcante Marcos David - - 2013
The purpose this study was to examine the effects of caffeine ingestion on performance and energy expenditure (anaerobic and aerobic contribution) during a 4-km cycling time trial (TT) performed after a carbohydrate (CHO) availability-lowering exercise protocol. After preliminary and familiarization trials, seven amateur cyclists performed three 4-km cycling TT in ...
Samadi Zeinab - - 2013
Premenstrual syndrome (PMS) is a combination of physical, psychological, or behavioral changes in the late secretary phase of menstrual cycle and interferes with interpersonal relationships or activities. The purpose was to assess the effects of 8 weeks of regular aerobic exercise on PMS in non-athlete girls. This quasi-experimental study was ...
Camargo Pires-Neto Ruy - - 2013
Early mobilization can be performed in critically ill patients and improves outcomes. A daily cycling exercise started from day 5 after ICU admission is feasible and can enhance functional capacity after hospital discharge. In the present study we verified the physiological changes and safety of an earlier cycling intervention (< ...
Egan Brendan - - 2013
Repeated bouts of episodic myofibrillar contraction associated with exercise training are potent stimuli for physiological adaptation. However, the time course of adaptation and the continuity between alterations in mRNA expression and protein content are not well described in human skeletal muscle. Eight healthy, sedentary males cycled for 60 min at ...
Driss Tarak - - 2013
The interests and limits of the different methods and protocols of maximal (anaerobic) power (P max) assessment are reviewed: single all-out tests versus force-velocity tests, isokinetic ergometers versus friction-loaded ergometers, measure of P max during the acceleration phase or at peak velocity. The effects of training, athletic practice, diet and ...
Sipavičienė Saulė - - 2013
The aim of this study was to investigate whether variation in estrogen levels during the menstrual cycle influences susceptibility to exercise-induced muscle damage after stretch-shortening cycle exercise. Physically active women (n = 18; age = 20.2 ± 1.7 yr) participated in this research. The subjects performed one session of 100 maximal ...
Billaut François - - 2013
To investigate the interaction between the development of peripheral locomotor muscle fatigue, muscle recruitment and performance during repeated-sprint exercise (RSE). In a single-blind, randomised and cross-over design, ten male team-sport athletes performed two RSE (fifteen 5-s cycling sprints interspersed with 25 s of rest; power self-selected) in normoxia and in ...
Bhandari Bharti - - 2013
Objectives: The present study was planned to assess the effects of gonadal steroids (estrogen and progesterone) on bronchial responsiveness, before and after handgrip exercise, during different phases of menstrual cycle. Materials and Methods:In this study, 30 healthy (25-40 years), non-athletic, adult female volunteers were studied. The various pulmonary function parameters ...
Rizk Amanda K - - 2013
Pulmonary rehabilitation (PR) is an important component in the management of respiratory diseases. The effectiveness of PR is dependent upon adherence to exercise training recommendations. The study of exercise adherence is thus a key step towards the optimization of PR programs. To date, mostly indirect measures, such as rates of ...
Bachasson Damien - - 2013
Exercise intolerance in COPD seems to combine abnormal ventilatory mechanics, impaired O2 transport and skeletal muscle dysfunction. However their relatie contribution and their influence on symptoms reported by patients remain to be clarified. In order to clarify the complex interaction between ventilatory and neuromuscular exercise limiting factors and symptoms, we ...
Goh Jorming J Interdisciplinary Program in Nutritional Sciences Medicine, University of Washington, Seattle, WA, - - 2013
Exercise training (ET) and physical activity (PA) offer obvious health benefits in regular participants. In pre-clinical animal models, treadmills and running wheels are the models of choice for intervention studies using ET and PA. However, the frequency and duration necessary for positive effects on health are not completely understood. We ...
Jepson Paul D PD Institute of Zoology, Zoological Society of London, Regent's Park, London, United Kingdom. - - 2013
On 9 June 2008, the UK's largest mass stranding event (MSE) of short-beaked common dolphins (Delphinus delphis) occurred in Falmouth Bay, Cornwall. At least 26 dolphins died, and a similar number was refloated/herded back to sea. On necropsy, all dolphins were in good nutritive status with empty stomachs and no ...
Sugita Norihiro N Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, - - 2013
Cycling is known to be an effective rehabilitation exercise for hemiplegic patients who face difficulty during walking because of stroke or other brain disorders. A cycling wheelchair (CWC) is a useful tool to provide exercise for these patients and improve their quality of life. In previous studies, our group developed ...
Chen Tsung-I TI Graduate Institute of Sport Science, National Taiwan Sport University, Taoyuan, Taiwan ; Center for Physical Education, Tzu Chi University, Hualien, - - 2013
To examine whether short-term, ie, five daily sessions, vigorous dynamic cycling exercise and heat exposure could achieve heat acclimation in trained athletes and the effect of heat acclimation on cutaneous blood flow in the active and nonactive limb. Fourteen male badminton and table tennis athletes (age = 19.6 ± 1.2 ...
Matsuse Hiroo H Division of Rehabilitation, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, Japan. - - 2013
A hybrid training system (HTS) has been developed as the combined application of electrical stimulation (ES) and volitional contractions (VC), using electrically stimulated eccentric antagonist muscle contractions as a resistance to voluntary agonist muscle contractions. The purpose of the present study is to compare the metabolic cost between cycling exercise ...
Larson Rebecca D RD Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA. - - 2013
Bilateral differences in lower-limb strength in people with multiple sclerosis (MS) have been clinically observed. The objectives of this study were to quantify bilateral differences in lower-limb performance and metabolism during exercise. Eight ambulatory individuals with mild MS with an Expanded Disability Status Scale score of 2.6 +/- 1.6 and ...
Siegler Jason C JC School of Science & Health, University of Western Sydney, Locked Bag 1797, Sydney, NSW 2751, - - 2013
The purpose of this study was to examine the efficacy of introducing a fish protein hydrolysate (PEP) concurrently with carbohydrate (CHO) and whey protein (PRO) on endurance exercise metabolism and performance. In a randomised, double blind crossover design, 12 male volunteers completed an initial familiarisation followed by three experimental trials. ...
Hasnan Nazirah - - 2012
PURPOSE: This study compared acute exercise responses during arm cranking, functional electrical stimulation (FES)-assisted leg cycling and combined arm and leg ("hybrid") cycling in individuals with spinal cord injury (SCI) during maximal and submaximal exercise. METHODS: Nine male subjects with long-standing neurological lesions from C7-T12 were recruited. All subjects performed ...
Laroche Davy - - 2012
OBJECTIVE: To assess the safety and acute effects of a procedure using perceived exertion during a prior submaximal concentric (CON) test to individualize eccentric (ECC) cycling exercise intensity. DESIGN: Prospective monocentric open study. SETTING: Technological Investigation Platform at the Physical Medicine and Rehabilitation Department, Dijon University Hospital. PARTICIPANTS: Eighteen healthy ...
Klopp Dawn Marie - - 2013
The study involved application of different applied loads to measure altered test durations, time to peak power, peak power, and peak cadence during intense cycle ergometry exercise. Healthy, physically active male (n = 11) and female (n = 11) subjects (18-45 years) performed the following 3 bouts of intense cycle ...
Kato Jo - - 2012
Background: Oscillatory breathing, alternating between hyperpnea and hypopnea, has been recognized in cardiac patients, especially in those with heart failure. We evaluated whether the cycle length and amplitude of oscillatory breathing correlate with impaired cardiopulmonary function during exercise. Methods and Results: We analyzed respiratory gas data during cardiopulmonary exercise testing (CPX) in ...
Turner Louise A - - 2012
The aim of this study was to determine the effect of inspiratory loading on limb locomotor (LM) and respiratory muscle (RM) deoxygenation ([deoxy (Hb+Mb)]) using NIRS during constant-power cycling exercise. Sixteen, male cyclists completed three, 6-min trials. The intensity of the first 3-min of each trial was equivalent to ∼80% ...
Leites Gabriela Tomedi GT Graduate Program in Human Movement Science, School of Physical Education, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil. - - 2013
To compare thermoregulatory and perceptual responses between lean and obese girls during and after exercise under heat (HC) and thermoneutral (TC) conditions. In a randomized order, 27 girls (14 lean [16.6 ± 6.7% fat and 9.1 ± 1.3 years] and 13 obese [41.3 ± 6.7% fat and 9.4 ± 1.1 ...
Olsen Olav - - 2012
The aim of the present study was to investigate the effect of warm-up and cool-down exercise on delayed onset of muscle soreness at the distal and central parts of rectus femoris following leg resistance exercise. Thirty-six volunteers (21 women, 15 men) were randomly assigned to the warm-up (20 min ergometer ...
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