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Results 601 - 650 of 1437
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Nagasawa Yoshinori - - 2005
Present purposes were to examine the characteristics of controlled force exertion in 28 developmentally delayed young people (14 men, 14 women), and sex differences compared to 28 normal young students (14 men, 14 women). The subjects matched their submaximal grip strength to changing demand values displayed in a bar chart ...
Grosset Jean-Francois - - 2005
The twitch of the triceps surae muscle (TS), which characterizes the contractile properties independently of volition, differs in amplitude, but not in time course, when evoked in pre or postpubertal children. The aim of the present study was to compare the TS twitch contractile properties in prepubertal children (7 to ...
Xu Jie - - 2005
In order to develop a patent tissue-engineered blood vessel that grossly resembles native tissue, required culture times in most studies exceed 8 weeks. For the sake of shortening the maturation period of the constructs, we have used deformation as the basic index for mechanical environment control. A new bioreactor with ...
Forrest Kimberly Y Z - - 2005
Decreased muscle strength with aging is associated with functional disability in older adults. However, few studies have longitudinally evaluated the rate of muscle strength loss and the risk factors for the loss in older men. This study examined the patterns and determinants of muscle strength change with aging in a ...
Ridout Samuel J - - 2005
The influence of age on limb vasodilator capacity in women is unclear. The objectives of this study were to characterize and compare age-associated changes in forearm and calf peak vascular conductance (VC(peak); a functional index of arterial structure) in women and to identify physiological characteristics predictive of variation in limb-specific ...
da Rocha Sicknan Soares - - 2005
Heating titanium structures is assumed to relieve tensions induced by the casting process as well as possibly optimizing some mechanical properties. The aim of this investigation was to evaluate the effect of thermal treatments on tensile strength of commercially pure titanium (CP Ti) and Ti-6Al-4V alloy. Thirty dumbbell rods, with ...
Arslan Cengiz - - 2005
The aim of this study was to investigate a possible relation between power performance of the Wingate test (WT) and isometric leg strength (ILS) and explosive leg strength (ELS) characteristics in young men and women with different physical fitness levels. A total of 166 subjects, including 98 young men and ...
Armstrong Bridget S - - 2005
BACKGROUND: Whiplash may damage structures within the neck that can affect position sense. Deep neck flexor muscle retraining may improve position sense. The current study compared range of motion and position sense in whiplash and control subjects and investigated the effects of a muscle training session on position sense. METHODS: ...
Flansbjer Ulla-Britt - - 2005
OBJECTIVE: To assess the intra-rater (between occasions) test-retest reliability of isokinetic knee muscle strength measurements in subjects with chronic poststroke hemiparesis and to define limits for the smallest change that indicates real (clinical) improvements for stroke patients. SUBJECTS: Fifty men and women (mean age 58 +/- 6.4 years) 6-46 months ...
Berkowitz Robert - - 2005
OBJECTIVES: The purpose of this study was to determine whether the depth of insertion through the far cortex of self-tapping screws significantly affects pullout strength. DESIGN: Fifty, Synthes, 3.5-mm, self-tapping screws were inserted into synthetic bone blocks and divided into 5 groups. Group 1 had screws with their tips inserted ...
Grabljevec K - - 2005
PURPOSE: To compare the strength and endurance of knee extensors in subjects after paralytic poliomyelitis as well as to extend the comparison to healthy subjects. METHOD: Twenty subjects after poliomyelitis with new symptoms (SYM group), 10 without new symptoms (ASYM group) and 15 healthy controls were included. To determine strength, ...
Kostka Tomasz - - 2005
The ability to develop adequate quadriceps muscle power may be highly predictive of subsequent disability among older persons. Rate as well as quantitative (sarcopenia) and qualitative (among other slowing of muscles) contributors to that age-related power decline are poorly known. The relationship of quadriceps maximal short-term power (P(max)) and corresponding ...
Rezasoltani A - - 2005
BACKGROUND: Free style and Greco-Roman are two types of wrestling. [figure: see text] OBJECTIVES: The aim of this study was to examine the maximal isometric strength of cervical extension (ISCE) and the maximal isometric strength of cervical flexion (ISCF) in two groups of elite wrestlers and a group of non-athletic ...
Harkins Kelly M - - 2005
CONTEXT: Muscle fatigue is generally categorized in 2 ways: that caused by peripheral weakness (peripheral fatigue) and that caused by a progressive failure of voluntary neural drive (central fatigue). Numerous variables have been studied in conjunction with fatigue protocols, including postural stability, maximum voluntary contraction force, and reaction time. When ...
Balci Kemal - - 2005
OBJECTIVE: Single fiber EMG (SFEMG) is a potent electrophysiological method to evaluate impaired neuromuscular transmission, and allows sensitive diagnosis of neuromuscular transmission abnormalities such as myasthenia gravis. The jitter and fiber density values are different for various muscles and age groups and the reference values increase with age. In this ...
Krause David A - - 2005
OBJECTIVE: To describe abdominal muscle performance as measured by the double leg-lowering test (DLLT) in healthy subjects. DESIGN: Repeated measures. SETTING: Academic laboratory. PARTICIPANTS: A sample of 100 healthy volunteers (50 men, 50 women; age range, 18-29 y). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Repeat measurements of the DLLT to ...
Klein Ronald - - 2005
PURPOSE: To investigate the associations of measures of frailty to prevalent age-related maculopathy (ARM). DESIGN: Cross-sectional population-based study. METHODS: Time to walk a measured course (gait-time), handgrip strength, peak expiratory flow rate, ability to stand from a sitting position without using arms, self-reported co-morbidities, and ARM were assessed at the ...
Jacobs Cale - - 2005
Contralateral muscular imbalances have been suggested to increase the risk of lower extremity injury. Previous groups have assessed strength of the quadriceps and hamstring muscle groups; however, no previous authors have compared bilateral hip-abductor muscular performance. To examine the strength and fatigability of the hip abductors in the dominant and ...
Falk B - - 2005
PURPOSE: To evaluate bone properties, muscle strength and the relationship between the two, in young (7.0-17.7 years) haemophilia patients (h) and healthy boys (c). SUBJECTS: Twenty-seven boys with severe haemophilia and 33 healthy boys, of similar age, body mass, height, (mean +/- sd for h and c, respectively: 11.2 +/- ...
Sale Martin V - - 2005
The purpose of the study was to examine age-related differences in electromyographic (EMG) responses to transcranial magnetic stimulation (TMS) during functional isometric contractions in left and right hands. EMG responses were recorded from the first dorsal interosseus muscle following TMS in 10 young (26.6 +/- 1.3 yr) and 10 old ...
Challis John H - - 2006
This study examined the variability and regularity of maximum isometric moment production of the plantar flexors in young and old subjects. It was hypothesized that in the development of maximum isometric moments there would be greater regularity in the moment profiles for older subjects compared with young subjects, due to ...
Arola D - - 2005
An experimental study on the mechanical behavior of human dentin and the influence of age was conducted. Beams with rectangular cross-section were sectioned from the coronal dentin of virgin extracted molars (N = 76) that were obtained from (N = 70) patients between 17 and 80 years of age. The ...
Bautmans Ivan - - 2005
BACKGROUND AND AIMS: Although a wide variety of protocols are available for evaluating skeletal muscle fatigue resistance, they often necessitate important technological resources or are too complicated for elderly subjects. We present here a new test, designed for elderly persons, based on maintaining maximal voluntary grip strength as long as ...
Hatta Takeshi - - 2005
The present study examined the relationship between upper- and lower-limb laterality and the difference in kinaesthetic function between lower limbs. A total of 360 early and late middle-aged people from rural areas in Japan participated in the study. The first purpose was to describe upper- and lower-limb lateral preferences. Approximately ...
Smits-Engelsman B C - - 2005
Force control ability was investigated in 10 males and 10 females, between 5 and 15 years old with spastic hemiplegia (mild and moderate hand dysfunction), and an aged-matched control group (eight males, 12 females). An isometric force production task at five different levels of maximum voluntary contraction (MVC) was performed. ...
Hashimoto Naoki - - 2005
The present study was designed to determine the resultant force acting on the hip joint during walking using a new dynamic analysis method. Our model utilized joint motion, ground reaction force, and muscle strength data from 18 women (6 normal women aged 20-24 years, 6 normal women aged 50-57 years, ...
Dominick Kelli L - - 2005
OBJECTIVE: Little is known about how specific radiographic features are related to hand strength in osteoarthritis (OA). This study examined associations of radiographic variables with pinch and grip strength among individuals with radiographic hand OA. METHODS: Participants (n = 700, 80% female, mean age 69 years) were part of a ...
Gorostiaga E M - - 2005
This study compared physical characteristics (body height, body mass [BM], body fat [BF], and free fatty mass [FFM]), one repetition maximum bench-press (1RM (BP)), jumping explosive strength (VJ), handball throwing velocity, power-load relationship of the leg and arm extensor muscles, 5- and 15-m sprint running time, and running endurance in ...
Simoneau Emilie - - 2005
The effect of aging on mechanical and electromyographic characteristics of ankle joint muscles was investigated in 11 young (mean age 24 years) and 12 elderly (mean age 77 years) males. Maximal and submaximal isometric voluntary torques were measured during ankle plantarflexion and dorsiflexion. Electromyographic activities of triceps surae and tibialis ...
McNeil Chris J - - 2005
The rate of motor unit (MU) loss and its influence on the progression of sarcopenia is not well understood. Therefore, the main purpose of this study was to estimate and compare numbers of MUs in the tibialis anterior (TA) of young men ( approximately 25 years) and two groups of ...
Kenjle Kavita - - 2005
The purpose of this study was to evaluate the use of grip strength as an index of nutritional status in 6-10 y old children. Seven hundred and eighty seven children (364 boys and 423 girls) in the age group of 6 to 10 y were selected from private and municipal ...
Luna-Heredia Esther - - 2005
AIMS: To establish normal reference values for handgrip strength in healthy adult subjects using hand dynamometry. SUBJECTS AND METHODS: Descriptive study of 517 healthy volunteers (267 females and 229 males) aged 17-97 years. Grip strength was measured using two different handgrip dynamometers. Three consecutive measurements were made in both the ...
Sowers MaryFran R - - 2005
BACKGROUND: In the aging process, loss of muscle is relatively continuous, but the initiation, timing, and amount of muscle loss that relate to functional compromise are poorly described. Also poorly understood is whether strength and functioning in aging are related to the amount of lean mass and its change as ...
Aydog S T - - 2005
BACKGROUND: Gymnasts usually start intensive training from early childhood. The impact of such strenuous training on the musculoskeletal system is not clear. OBJECTIVES: To evaluate the relation between muscle strength of the ankle joint and foot structure in gymnasts. METHODS: The study population comprised 20 high level male gymnasts and ...
Swartz Erik E - - 2005
Context: The presence or absence of biomechanical differences between the sexes before puberty may provide clues about the onset of adult landing pattern differences, which may help to explain the greater number of anterior cruciate ligament injuries in females than in males and provide the basis for interventions to reduce ...
Wiroth Jean-Baptiste - - 2005
BACKGROUND: Because patients with Crohn's disease (CD) often show increased energy expenditure, nutritional deficiencies, and general fatigue, all which may persist after a flare, we hypothesized that CD could alter muscle mass and function. This study aimed to assess muscle strength and endurance in CD patients in clinical remission and ...
Knudson Duane - - 2005
Stretching in the warm-up has been shown to decrease several muscular performance variables, but the dose-response of this effect is unknown. This study documented the change in isometric grip strength over ten trials in a convenience sample of young adults randomly assigned to control (n=22) or repeated bouts of 10-s ...
Meister Keith - - 2005
BACKGROUND: Differences in range of motion and rotational motion between the dominant and nondominant shoulders in throwing athletes are well documented, although the age at which these changes begin to occur is not known. HYPOTHESIS: Changes in glenohumeral rotational motion in the shoulder of the Little League/adolescent baseball player occur ...
Klass Malgorzata - - 2005
This study examines the age-related deficit in force of the ankle dorsiflexors during isometric (Iso), concentric (Con), and eccentric (Ecc) contractions. More specifically, the contribution of neural and muscular mechanisms to the loss of voluntary force was investigated in men and women. The torque produced by the dorsiflexors and the ...
Tsang William W N - - 2005
PURPOSE: The objectives of this cross-sectional study were to examine whether older Tai Chi practitioners had better knee muscle strength, less body sway in perturbed single-leg stance, and greater balance confidence than healthy older adults. METHODS: Tai Chi and control subjects (N = 24 each, aged 69.3 +/- 5.0 and ...
Manini Todd M - - 2005
OBJECTIVE: To determine how knee extensor steadiness is related to age and difficulty performing everyday tasks. DESIGN: In this cross-sectional study performed at a research laboratory, 50 older adults (age range, (56-95 yrs) performed steadiness testing at 50% of maximum strength and were timed and rated on four tasks of ...
Suryanarayana Laxmi - - 2005
BACKGROUND: Studies have demonstrated that cervical strength is affected by injury to the neck. Cervical strength measurements are influenced by the protocol used for the measurements. Previous studies have determined the isometric cervical strength only at a few degrees of range of neck motion. The present study was aimed at ...
Davis D Scott - - 2005
This study compares the effects of 3 common stretching techniques on the length of the hamstring muscle group during a 4-week training program. Subjects were 19 young adults between the ages of 21 and 35. The criterion for subject inclusion was tight hamstrings as defined by a knee extension angle ...
Bryden P J - - 2005
The purpose of the current investigation was to examine the age-related changes in the performance of the two hands on the Annett pegboard (Annett, 1970). The current study was part of a large-scale study investigating the development of unimanual and bimanual performance. Three hundred and two right-handed individuals participated in ...
Tanaka Hajime - - 2005
There are two types of isotropic disordered nonergodic states in colloidal suspensions: colloidal glasses and gels. In a recent paper [H. Tanaka, J. Meunier, and D. Bonn, Phys. Rev. E 69, 031404 (2004)], we discussed the static aspect of the differences and the similarities between the two. In this paper, ...
Chung Sun G - - 2005
OBJECTIVE: To quantitatively evaluate changes in neuromuscular reflex system properties that are associated with aging. DESIGN: Controlled, experimental. SETTING: Research laboratory in a rehabilitation hospital. PARTICIPANTS: Fourteen elderly (age, 69.4+/-7.1 y) and 18 young (age, 29.9+/-6.5 y) healthy subjects. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: With the subject relaxed, an ...
Götherström Galina - - 2005
OBJECTIVE: Little is known of the long-term effects of GH replacement therapy on muscle strength in elderly adults with adult onset GH deficiency (GHD). In this study, the effects of 5 years of GH replacement therapy on muscle function were determined in adults over 60 years of age with adult ...
Mell Amy G - - 2005
The purpose of this study was to test the hypothesis that shoulder rhythm is affected by rotator cuff pathology during arm elevation. We divided 42 subjects into 3 groups: those with full-thickness rotator cuff tears (RCTs) (n = 14), those with tendinopathy (n = 13), and control subjects (n = ...
Souza Aaron L - - 2005
INTRODUCTION: Manual wheelchair users have been found to be at risk for secondary upper extremity injuries. PURPOSE: The primary goal of this study was to compare shoulder strength and muscle imbalance of individuals with paraplegia to case-wise matched unimpaired controls (UC). A secondary goal was to evaluate the impact of ...
Geurts C L M - - 2005
AIM: To investigate the effects of cold acclimation on the thermal response and neuromuscular function of the hand. METHODS: Ten healthy subjects [three female, seven male, age (mean +/- SD): 27.9 +/- 7.9 years] immersed their right hand in 8 degrees C water for 30 min, 5 days a week ...
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