Search Results
Results 201 - 250 of 1146
< 1 2 3 4 5 6 7 8 9 10 >
Oliveira Anderson de Souza Castelo Ade - - 2009
The aim of this study was to evaluate the EMG activity of lumbar multifidus (MU), longissimus thoracis (LT) and iliocostalis (IC) muscles during an upper limb resistance exercise (biceps curl). Ten healthy males performed maximal voluntary isometric contraction (MVC) of the trunk extensors, after this, the biceps curl exercise was ...
El Mhandi Lhassan - - 2008
Exercise intolerance and undue fatigue are common complaints in patients with Charcot-Marie-Tooth (CMT) disease. Reduced physical ability is due directly to the disease, but it is also due to physical deconditioning. The aim of this study was to test whether 24 weeks of interval-training exercise (ITE) cycling can significantly improve ...
Nijs Jo - - 2008
OBJECTIVE: It was hypothesized that the use of exercise limits prevents symptom increases and worsening of their health status following a walking exercise in people with chronic fatigue syndrome. DESIGN: An uncontrolled clinical trial (semi-experimental design). SETTING: Outpatient clinic of a university department. SUBJECTS: Twenty-four patients with chronic fatigue syndrome. ...
Saito Yoko - - 2008
PURPOSE: Females have been reported to have greater resistance to skeletal muscle fatigue than males. Blood flow, which plays an important role in supplying oxygen and nutrients to working muscles, may play an important role in the mechanisms of gender difference. We hypothesized that females would have greater conduit artery ...
Nijs Jo - - 2008
Controversy regarding the aetiology and treatment of patients with chronic fatigue syndrome continues among the medical professions. The Cochrane Collaboration advises practitioners to implement graded exercise therapy for patients with chronic fatigue syndrome using cognitive behavioural principles. Conversely, there is evidence that exercise can exacerbate symptoms in chronic fatigue syndrome, ...
Dimeo F - - 2008
BACKGROUND: Fatigue is a relevant problem of cancer patients during and after treatment. Several studies have shown that exercise can improve quality of life and functional status of cancer patients undergoing chemo- or radiotherapy. However, there is a lack of information about the effects of this intervention on persistent cancer-related ...
Harvey Samuel B SB Institute of Psychiatry, King's College London, London, UK. - - 2008
To review the etiology of chronic fatigue syndrome (CFS) and test hypotheses relating to immune system dysfunction, physical deconditioning, exercise avoidance, and childhood illness experiences, using a large prospective birth cohort. A total of 4779 participants from the Medical Research Council's National Survey of Health and Development were prospectively followed ...
White Kevin T - - 2008
Recent studies suggest that the Shaker exercise induces fatigue in the upper esophageal sphincter (UES) opening muscles and sternocleidomastoid (SCM), with the SCMs fatiguing earliest. The aim of this study was to measure fatigue induced by the isometric portion of the Shaker exercise by measuring the rate of change in ...
Thickbroom Gary W - - 2008
OBJECTIVE: To determine if task performance and fatigability during rapid repetitive exercise of the lower limb differ in a group of MS subjects compared to a control group, and what central changes accompany the development of fatigue and the period of recovery. METHODS: Transcranial magnetic stimulation (TMS) was used to ...
Taylor Bryan J - - 2008
High-intensity exercise (> or =90% of maximal O(2) uptake) sustained to the limit of tolerance elicits expiratory muscle fatigue (EMF). We asked whether prior EMF affects subsequent exercise tolerance. Eight male subjects (means +/- SD; maximal O(2) uptake = 53.5 +/- 5.2 ml.kg(-1).min(-1)) cycled at 90% of peak power output ...
Ting Ping-Huang - - 2008
Long duration of driving is a significant cause of fatigue-related accidents on motorways or major roadways. The fatigue caused by driving for extended periods acutely impairs driver alertness and performance and can compromise transportation safety. This study quantitatively measured the progression of driver fatigue and identified the conservative safe duration ...
McCullagh Ruth - - 2008
OBJECTIVE: To determine if exercise benefits patients with multiple sclerosis. DESIGN: Randomized controlled trial. SETTINGS: Participants exercised at home and also attended exercise classes held in a hospital physiotherapy gym. SUBJECTS: Thirty patients, diagnosed and independently mobile, were recruited in the Dublin area. INTERVENTION: For three months, classes were held ...
Dempsey Jerome A - - 2008
We briefly summarize recent evidence pertaining to how mechanisms primarily under the control of the respiratory system-namely, arterial oxyhemoglobin desaturation, respiratory muscle work and fatigue, and cyclical fluctuations in intrathoracic pressure-may contribute to exercise limitation. Respiratory influences on cardiac output and on sympathetic vasoconstrictor activity and blood flow distribution are ...
Stephen Sharon A - - 2008
PURPOSE: The purpose of this study was to describe fatigue and the relationships among fatigue intensity, self-reported functional status, and quality of life in older adults with stable heart failure. METHODS: A descriptive, correlational design was used to collect quantitative data with reliable and valid instruments. Fifty-three eligible volunteers completed ...
Jing L - - 2008
AIM: There are few researches on the effects of music therapy on the recovery from exercise-induced fatigue worldwide. The aim of this study was to evaluate the effects of relaxing music on aerobic exercise-induced fatigue. The authors' hypothesis is that relaxing music can effectively eliminate aerobic exercise-induced fatigue. METHODS: Thirty ...
Martins Jaqueline - - 2008
Imbalance and weakness of the serratus anterior and upper trapezius force couple have been described in patients with shoulder dysfunction. There is interest in identifying exercises that selectively activate these muscles and including it in rehabilitation protocols. This study aims to verify the UT/SA electromyographic (EMG) amplitude ratio, performed in ...
Lydakis C - - 2008
Chronic dynamic (aerobic) exercise decreases central arterial stiffness, whereas chronic resistance exercise evokes the opposite effect. Nevertheless, there is little information available on the effects of acute bouts of exercise. Also, there is limited data showing an increase of central arterial stiffness during acute mental stress. This study aimed to ...
Dickin D C - - 2008
Investigations of postural recovery following controlled external perturbations have provided models for healthy and pathological balance behavior. Less work, however, has investigated postural responses related to internal perturbations of the balance system. In this study, lower extremity joint (knee, or ankle) and overall fatigue of the dominant leg provided the ...
Xu Chuan-Xiang - - 2008
To investigate changes of 5-hydroxytryptamine (5-HT) and its synthesis rate-limiting enzyme tryptophan hydroxylase (TPH) in the ventral horn of spinal cord after exercise-induced fatigue, and to further discuss the mechanism of exercise-induced central fatigue at spinal level. Sixteen healthy adult Wistar rats were randomly divided into 2 groups: exercise-induced fatigue ...
Rainoldi Alberto - - 2008
Twelve endurance athletes and six power athletes performed fatiguing isokinetic knee flexions/extensions. Isokinetic torque was recorded during the exercise. Isometric torque, cortisol and lactate responses, electromyographic (EMG) mean power frequency, average rectified value, and conduction velocity were analysed before and after the isokinetic exercise to determine correlations between electrophysiological variables ...
Macdonald Jamie Hugo - - 2008
PURPOSE: Surface electromyographic (EMG) variables allow study of the electrical activity of motor units within active skeletal muscle. Recent methodological advances permit the estimation of muscle fiber-conduction velocity (MFCV) from EMG signals recorded during dynamic exercise. However, EMG responses to incremental and fatiguing cycling are poorly understood. METHODS: Twenty males ...
de Araújo Rodrigo Cappato - - 2009
The purpose of the present study was to evaluate the intra and interday reliability of surface electromyographic amplitude values of the scapular girdle muscles and upper limbs during 3 isometric closed kinetic chain exercises, involving upper limbs with the fixed distal segment extremity on stable base of support and on ...
Nummela A T - - 2008
This study investigated fatigue-induced changes in neuromuscular and stride characteristics during and immediately after the 5-km running time trial. Eighteen well-trained male distance runners performed a maximal 20-m sprint test and maximal voluntary contraction (MVC) in a leg press machine before and immediately after the 5-km running time trial. In ...
Wiles Jonathan D - - 2008
Currently, it is not possible to prescribe isometric exercise at an intensity that corresponds to given heart rates or systolic blood pressures. This might be useful in optimizing the effects of isometric exercise training. Therefore, the aim of this study was to explore the relationships between isometric exercise intensity and ...
Yamauchi Junichiro - - 2008
It is not known how the mode of exercise, dynamic and static exercises, affects the limb volume. Therefore, the purpose of this study was to investigate hand and wrist volume (HWV) after dynamic and static handgrip exercise. Nine healthy subjects (age 31.8 +/- 7.3 years; height 172.0 +/- 5.7 cm; ...
Marcora Samuele M - - 2008
Locomotor muscle fatigue, defined as an exercise-induced reduction in maximal voluntary force, occurs during prolonged exercise, but its effects on cardiorespiratory responses and exercise performance are unknown. In this investigation, a significant reduction in locomotor muscle force (-18%, P < 0.05) was isolated from the metabolic stress usually associated with ...
Dartnall Tamara J - - 2008
The purpose of this study was to determine the effect of eccentric exercise on correlated motor unit discharge (motor unit synchronization and coherence) during low-force contractions of the human biceps brachii muscle. Eight subjects (age, 25 +/- 7 yr) performed three tasks involving isometric contraction of elbow flexors while EMG ...
Puetz Timothy W - - 2008
BACKGROUND: There is growing evidence that chronic exercise is a promising intervention for combating feelings of low energy and fatigue. Although groups with well-defined medical conditions (for example cancer and heart disease) or unexplained fatigue syndromes consistently have reported improved feelings of energy and fatigue after chronic exercise, relatively few ...
Foley Teresa E - - 2008
Habitual exercise increases plasticity in a variety of neurotransmitter systems. The current review focuses on the effects of habitual physical activity on monoamine dopamine (DA) neurotransmission and the potential implication of these changes to exercise-induced fatigue. Although it is clear that peripheral adaptations in muscle and energy substrate utilization contribute ...
Moreau Noelle - - 2008
PURPOSE: To develop a reliable and feasible isokinetic fatigue protocol for the knee flexors and extensors in individuals with cerebral palsy (CP) who are ambulatory. METHODS: Twelve subjects with CP, 10 to 23 years old, participated in the study. The protocol consisted of repeated maximum voluntary concentric knee flexion and ...
Cheung Stephen S - - 2008
Hyperthermia, through either passive exposure or exercise in hot environments, can severely impair exercise capacity, and one primary pathway of impairment may be the neuromuscular system. This is because fatigue or reduced exercise capacity in other physiological systems ultimately terminate in an inability of the muscle to adequately generate the ...
Hoffman Jay R - - 2008
The purpose of this study was to examine the effect of 30 days of beta-alanine supplementation in collegiate football players on anaerobic performance measures. Subjects were randomly divided into a supplement (beta-alanine group [BA], 4.5 g x d(-1) of beta-alanine) or placebo (placebo group [P], 4.5 g x d(-1) of ...
Paulus David C - - 2008
During the concentric portion of the free-weight squat exercise, accelerating the mass from rest results in a fluctuation in ground reaction force. It is characterized by an initial period of force greater than the load while accelerating from rest followed by a period of force lower than the external load ...
Friedberg Fred - - 2008
BACKGROUND: Understanding how patients with chronic fatigue syndrome (CFS) recall their fatigue is important because fatigue is a core clinical dimension of this poorly understood illness. PURPOSE: This study assessed the associations between momentary fatigue ratings and weekly recall of fatigue in 71 participants with CFS. METHOD: During the three-week ...
Oliveira Anderson Souza - - 2008
The aim of this study was to determine the time to restore the biceps brachii (BB) electromyographic (EMG) activity after the biceps curl (BC) exercise, at different intensities. Ten males performed initially maximal voluntary isometric contractions (MVC) of the elbow flexors, followed by one isometric submaximal contraction at 50% MVC ...
Joosen Margot - - 2008
OBJECTIVES: Complaints of prolonged fatigue are considered as a major health problem, as it can affect daily functioning and may lead to work disability. To increase knowledge about the effectiveness of interventions focussing on fatigued patients, a study was designed to evaluate an established training programme for patients with prolonged ...
Solnik Stanisław - - 2008
A temporal analysis of electromyographic (EMG) activity has widely been used for non-invasive study of muscle activation patterns. Such an analysis requires robust methods to accurately detect EMG onset. We examined whether data conditioning, supplemented with Teager-Kaiser Energy Operator (TKEO), would improve accuracy of the EMG burst onset detection. EMG ...
Romer Lee M - - 2008
It is commonly held that the respiratory system has ample capacity relative to the demand for maximal O(2) and CO(2) transport in healthy humans exercising near sea level. However, this situation may not apply during heavy-intensity, sustained exercise where exercise may encroach on the capacity of the respiratory system. Nerve ...
Shirasawa Hatuki - - 2009
The present study aimed to investigate differences among the soleus (Sol), medial gastrocnemius (MG) and tibialis anterior (TA) in electromyogram (EMG) activities during ambulatory condition without any moderate to high intensity exercise. From 10:00 to 17:00, seven healthy graduate students participated in EMG recordings, which included the measurements during maximal ...
Moazedi A A - - 2007
Traditional herbal medicines such as Petroselinum crispum (Parsley) have been used for treatment of intestinal disorders in Iran. To date no pharmacological evidence for their effectiveness has been reported. The aim of this study was to examine the relaxant effect of hydroalcoholic extract of Petroselinum crispum on isolated adult male ...
Dalsgaard Mads K - - 2007
Central fatigue refers to circumstances in which strength appears to be limited by the ability of the central nervous system to recruit motoneurons. Central fatigue manifests when the effort to contract skeletal muscles is intense and, thus, is aggravated when exercise is performed under stress, whereas it becomes attenuated following ...
O'Sullivan Dawn - - 2007
AIM: To measure fatigue and physical functioning in patients with end stage renal disease (ESRD) receiving haemodialysis and to investigate the relationships between fatigue and physical functioning. BACKGROUND: Fatigue and reduced physical functioning are among the most bothersome symptoms experienced by individuals receiving haemodialysis for ESRD. Research has shown that ...
Smith Jay - - 2007
OBJECTIVE: To quantify the electromyographic activity in the shoulder girdle musculature during ipsilateral kinetic chain exercises performed in a shoulder immobilizer in asymptomatic men. DESIGN: Descriptive. SETTING: Motion analysis laboratory at a tertiary care center. PARTICIPANTS: Five asymptomatic male volunteers, ages 24 to 32 years. INTERVENTION: Fine-wire (supraspinatus, infraspinatus, upper ...
Morihara Naoaki - - 2007
More than three thousand publications in the past have confirmed the efficacy of garlic for the prevention and treatment of a variety of diseases, acknowledging and validating its traditional uses. Garlic is also used for the treatment of fatigue, although the mechanism involved remain unclear. The anti-fatigue function of garlic ...
Medel Francisco J - - 2007
Highly cross-linked polyethylenes (HXLPEs) have been incorporated into the hip replacement armamentarium based on their improved wear resistance. However, two different methods of thermal treatment separate the orthopedic community as strategies to control potential long-term oxidation, and controversy remains with problems in the long-term use of acetabular liners (long-term oxidation, ...
Monga Uma - - 2007
OBJECTIVE: To show fatigue prevention and quality of life (QOL) improvement from cardiovascular exercise during radiotherapy. DESIGN: Prospective enrollment (n=21), randomized to exercise (n=11) and control groups (n=10), with pre- and post-radiotherapy between- and within-group comparisons. SETTING: Academic medical center. PARTICIPANTS: Localized prostate cancer patients undergoing radiotherapy. INTERVENTIONS: The interventional ...
Amann Markus - - 2008
During exercise, fatigue is defined as a reversible reduction in force- or power-generating capacity and can be elicited by "central" and/or "peripheral" mechanisms. During skeletal muscle contractions, both aspects of fatigue may develop independent of alterations in convective O(2) delivery; however, reductions in O(2) supply exacerbate and increases attenuate the ...
Nybo Lars - - 2008
The present review addresses mechanisms of importance for hyperthermia-induced fatigue during short intense activities and prolonged exercise in the heat. Inferior performance during physical activities with intensities that elicit maximal oxygen uptake is to a large extent related to perturbation of the cardiovascular function, which eventually reduces arterial oxygen delivery ...
Van Brussel Marco - - 2008
OBJECTIVE: To study the effects of a physical training program on exercise capacity, muscle force, and subjective fatigue levels in patients with mild to moderate forms of osteogenesis imperfecta (OI). STUDY DESIGN: Thirty-four children with OI type I or IV were randomly assigned to either a 12-week graded exercise program ...
Regueme S C - - 2007
This study examined the perceived movement velocity induced by tendon vibrations during the delayed recovery phase of a stretch-shortening cycle (SSC)-type exercise characterized by 2 to 4 days of neuromuscular and proprioceptive impairments. Seven subjects performed until exhaustion series of unilateral rebounds involving mostly the triceps surae muscle group. Fatigue ...
< 1 2 3 4 5 6 7 8 9 10 >