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Results 251 - 300 of 1015
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Nelson Maximillian J - - 2013
OBJECTIVES: Heart rate kinetics are faster in well-trained athletes at exercise onset, indicating sensitivity to training status, but whether they track performance changes due to changes in training load is unknown. DESIGN: Randomised, counterbalanced, cross-over. METHODS: 17 cyclists completed two weeks of light and two weeks of heavy training. The ...
Rodriguez-Marroyo J A - - 2013
Aim: The aim of this study was to compare the exercise intensity and competition load during Time Trial (TT), Flat (FL), Medium Mountain (MM) and High Mountain (HM) stages based heart rate (HR) and session rating of perceived exertion (RPE). Methods: We monitored both HR and RPE of 12 professional ...
Chaudhuri Aditi - - 2013
To estimate the prevalence of primary dysmenorrhoea among school girls and to compare the impact of exercise and hot water bottle on the occurrence and severity of primary dysmenorrhoea among the study population. A cross sectional study was done to estimate the prevalence of dysmenorrhoea in two schools of Chandigarh, ...
De Pauw Michel - - 2013
The concept of chronotropic incompetence may have to be fine-tuned in an era of proven benefit of heart rate reducing therapy. It is illustrated in three patients with heart failure referred for heart transplantation evaluation. In patients one and two, symptoms of heart failure and exercise capacity improved by reducing ...
Pessoa Bruna V - - 2013
To assess whether there is a correlation between oxygen uptake (VO2) and heart rate (HR) on-kinetics in the constant-load cycle-ergometer test (CLT) and the BODE index and its isolated variables in patients with chronic obstructive pulmonary disease (COPD). Fourteen male patients between 55 and 78 years of age with moderate ...
Bruning Rebecca S RS Noll Laboratory, Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, - - 2013
Antithrombotic therapy with oral aspirin (ASA) or clopidogrel (CLO) (Plavix; Bristol-Myers Squibb, Bridgewater, NJ) is associated with an attenuated skin vasodilator response and a greater rate of rise in core temperature in healthy, middle-age individuals during passive heating in a water perfused suit. The present double-blind, crossover study examined the ...
Green Howard J - - 2013
This study aimed at investigating the relative roles of the duration versus intensity of exercise on the metabolic adaptations in vastus lateralis to short-term (10 day) aerobic-based cycle training. Healthy males with a peak aerobic power ([Formula: see text]) of 46.0 ± 2.0 ml kg(-1) min(-1) were assigned to either a 30-min (n = 7) or a 60-min ...
Duncan Michael J - - 2013
Caffeine containing energy drinks are commonly consumed in the belief that they will enhance the quality of an exercise session and enhance mood. However, studies examining their efficacy are sparse. The aim of this study was to examine the effect of a caffeinated energy drink on leg pain perception, perceived ...
Wadell Karin - - 2013
Abstract The evaluation of dyspnea and its responsiveness to therapy in COPD should consider the multidimensional nature of this symptom in each of its sensory-perceptual (intensity, quality), affective and impact domains. To gain new insights into mechanisms of dyspnea relief following pulmonary rehabilitation (PR), we examined effects on the major ...
Lee Joshua F - - 2013
Non-vented "aerodynamic-helmets" reduce wind resistance but may increase head (Th) and gastro-intestinal (Tgi) temperature, and reduce performance when worn in hot conditions. This study tested the hypothesis that Th and Tgi would be greater during low intensity cycling in the heat while wearing an aero-helmet (AERO) vs. a traditional vented ...
Lamon Séverine - - 2013
The striated muscle activator of Rho signaling (STARS) protein and members of its downstream signaling pathway, including myocardin-related transcription factor-A (MRTF-A) and SRF, are increased in response to prolonged resistance exercise training but also following a single bout of endurance cycling. The aim of the present study was to measure ...
Castro Antonio A M - - 2013
INTRODUCTION: Occurrence of dynamic hyperinflation during upper-limbs exercises in chronic obstructive pulmonary disease (COPD) patients it is not well established. We hypothesized that dynamic hyperinflation and thoracoabdominal asynchrony occurs in COPD patients accomplishing arms exercises. We assessed the occurrence and association of dynamic hyperinflation and thoracoabdominal asynchrony in COPD patients ...
Stevens Christopher John - - 2013
Abstract This study investigated the effect of ice slurry ingestion during a triathlon on intragastric temperature and 10 km running performance in the heat. Nine well-trained male triathletes performed two randomised trials of a simulated Olympic distance triathlon in hot conditions (32-34°C). Exercise intensity during the swim (1500 m) and cycle (1 ...
Mayo Nancy E - - 2013
Objective:To estimate the relative effectiveness in improving walking ability and other mobility and health outcomes post-stroke of two home-based exercise programmes - stationary cycling and an exercise and walking programme.Design:An observer-blinded, randomized, pragmatic, trial with repeated measures.Setting:Hospital centers in two Canadian cities.Subjects:People within 12 months of acute stroke who were ...
Hvid Lars G - - 2013
AIM: Prolonged muscle activity impairs whole muscle performance and function. However, little is known about the effects of prolonged muscle activity on the contractile function of human single muscle fibres. The purpose of the present study was to investigate the effects of prolonged exercise and subsequent recovery on the contractile ...
Cheng Ching-Feng - - 2013
This study examines the effects of inspiratory muscle warm-up (IMW) on performance and muscle oxygenation during cycling exercise. In a randomized crossover study of 10 female soccer players, the IMW, placebo (IMWP) and control (CON) trials were conducted before two 6-min submaximal cycling exercises (100 and 150W) followed by intermittent ...
Brurok Berit B St Olavs Hospital, Department of Physical Medicine and Rehabilitation, Spinal Cord Injury Unit, 7006 Trondheim, Norway. - - 2013
To compare peak oxygen uptake (VO2peak) between: (i) functional electrical stimulation lower extremity pulsed isometric muscle contractions combined with arm cycling (FES iso hybrid), (ii) functional electrical stimulation cycling combined with arm cycling (FES hybrid cycling), and (iii) arm cycling exercise (ACE) in individuals with spinal cord injury with level ...
Bardis Costas N - - 2013
Hypohydration exceeding 2% of body mass decreases exercise performance. However, the effects of mild hypohydration(<2%) are not clear. Purpose: The aim of this study was to determine the effects of mild hypohydration on cycling performance during a simulated-hill circuit course in a warm environment (32.5±0.5 °C). Methods: Ten trained male ...
Pires-Neto Ruy Camargo - - 2013
The objective of this study was to use a cycle ergometer to assess cardiorespiratory changes during active exercise and to verify patients' satisfaction with this type of activity. A single intervention involving active lower limb exercise was performed with a cycle ergometer (without load) for 5 minutes. The following variables ...
Andreacci Joseph L - - 2013
We examined the impact that cycle ergometry exercise had on percent body fat (% BF) estimates when assessed using either leg-to-leg or segmental bioelectrical impedance analysis (LBIA; SBIA) and whether the intensity of the exercise bout impacts the %BF magnitude of change. Seventy-four college-aged adults participated in this study. Participants ...
Matsuura R - - 2013
The purpose of the present study was to determine the effects of deception for exercise intensity on surface electromyogram (SEMG) activity and blood lactate concentration during intermittent cycling exercise (ICE) tests. Sixteen healthy male were randomly assigned to two groups who completed two ICE [three 4-min cycling at 80% peak ...
Klijn Peter - - 2013
RATIONALE: The optimal exercise training intensity and strategy for individualized exercise training in chronic obstructive pulmonary disease (COPD) is not clear. OBJECTIVE: This study compares the effects of nonlinear periodized exercise training (NLPE) used in athletes to traditional endurance and progressive resistance training (EPR) in patients with severe COPD. METHODS: ...
King Trevor J - - 2013
Endothelial function is essential for vasoprotection and regulation of vascular tone. Using handgrip exercise (HGEX) to increase blood flow-associated shear stress is an increasingly popular method for assessing brachial artery endothelial function via flow-mediated dilation (FMD). However, different exercise duty cycles [ratio of handgrip relaxation: contraction (seconds)] produce different patterns ...
Blanco I - - 2013
Pulmonary hypertension is a serious complication of COPD that currently has no established pharmacological treatment.To assess whether concomitant treatment with sildenafil would enhance the results of pulmonary rehabilitation in patients with COPD and increased pulmonary arterial pressure (PAP).Double-blind, randomised, controlled trial. Patients received 20 mg sildenafil or placebo t.i.d. and ...
Haile Luke - - 2013
Session perceived exertion (S-RPE) and session affective responses (S-AR) are post-exercise estimates of the global responses experienced during exercise. To compare S-RPE and S-AR to acute RPE (A-RPE) and acute AR (A-AR) during self-selected (SS) and imposed (IMP) exercise of the same workload. Thirty-two males (22.3 ± 2.2 years) performed two, 20-min cycle ...
Yu Fang - - 2013
There is a pressing need to establish recruitment, retention, and adherence feasibility to inform clinical trials that will evaluate how exercise affects the symptoms and disease trajectory in Alzheimer's disease (AD). This paper reported the recruitment rate, retention, and adherence from a 6-month cycling study in community-dwelling older adults with ...
Wetten Alexander Allan - - 2013
BACKGROUND: With physical inactivity inextricably linked to the increasing prevalence of obesity, there is a need for validated methods that measure free-living energy expenditure (EE) within sedentary environments. While accelerometers enable these measurements, few studies have compared device accuracy in such settings. Our aim was to investigate the relative validity ...
Muller Matthew D - - 2013
When exposed to a cold environment, a barehanded person experiences pain, cold sensation, and reduced manual dexterity. Both acute (e.g. exercise) and chronic (e.g. cold acclimatization or habituation) processes might lessen these negative effects. The purpose of this experiment was to determine the effect of cold habituation on physiology, perception, ...
Teunissen L P J - - 2013
Physiological and perceptual effects of wind cooling are often intertwined and have scarcely been studied in self-paced exercise. Therefore, we aimed to investigate (1) the independent perceptual effect of wind cooling and its impact on performance and (2) the responses to temporary wind cooling during self-paced exercise. Ten male subjects ...
Yavangi Mahnaz M Department of Obstetrics and Gynecology, Fatemieh Infertility Research Center, Hamadan University of Medical Sciences, Hamadan, - - 2013
  During the month of Ramadan, millions of Muslims abstain from food and drink daily from dawn to sunset and people actually experience repeated cycles of fasting and refeeding. Menstruation is a normal physiological process that its regularity is controlled by hypothalamic-pituitary-ovarian axis. Etiology of menstrual dysfunction includes weight loss, ...
Maltais François - - 2013
Chronic obstructive pulmonary disease (COPD) reduces patients' exercise capacities and their abilities to perform daily physical activities, thereby increasing morbidity and mortality rates. The cycle of dyspnea, deconditioning, and declining physical activity not only accelerates the progression of COPD but also increases the risk for developing or aggravating metabolic and ...
Chidnok Weerapong - - 2013
PURPOSE: We investigated the influence of pacing strategy on the work completed above critical power (CP) prior to exhaustion (W>CP) and the peak V˙o2 attained during high-intensity cycling. METHODS: Following determination of V˙o2max from a ramp incremental cycling test (INC) and estimation of the parameters of the power-duration relationship for ...
Viker Tomas - - 2013
Abstract Research with cyclists suggests a decreased load on the lower limbs by placing the shoe cleat more posteriorly, which may benefit subsequent running in a triathlon. This study investigated the effect of shoe cleat position during cycling on subsequent running. Following bike-run training sessions with both aft and traditional ...
Tan Min Sze - - 2013
Abstract The present study compares the effect of a single bout of sprint interval cycling against continuous cycling on postprandial lipaemia. Participants were nine healthy volunteers (five male), aged 20-26 years. Each participant undertook three 2-d trials in a random order. On day 1, participants rested (control), undertook a single ...
Stathokostas Liza - - 2013
The purpose of this study was to determine the effects of aerobic exercise training on the adjustment of pulmonary oxygen (O2) uptake ([Formula: see text]O2p) kinetics in postmenopausal women in 2 groups: those using hormone replacement therapy (HRT) (HRT group) (n = 7, aged 56 ± 4 years) and those ...
Etxebarria Naroa - - 2013
PURPOSE: To determine how cycling with a variable (triathlon-specific) power distribution affects subsequent running performance, and quantify relationships between an individual cycling power profile and running ability after cycling. METHODS: Twelve well-trained male triathletes (VO2peak 4.9 ± 0.5 L·min-1; mass 73.5 ± 7.7 kg, mean ± SD) undertook a cycle ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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