Search Results
Results 451 - 500 of 1396
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Galbán Craig J - - 2007
BACKGROUND: Loss of muscle mass and strength is a common symptom in the elderly population. This is partly a result of the structural changes that occur during the aging process. We applied diffusion tensor magnetic resonance imaging (DTMRI) to determine if water diffusivity in skeletal muscle changes with age. METHODS: ...
Niempoog Sunyarn - - 2007
OBJECTIVE: Find the correlation of grip strength in puberty with chronological age, height, weight, and percentage of body fat. MATERIAL AND METHOD: One thousand one hundred and five volunteer students between 11 and 14 years of age in Central Thailand participated in the study. The body weight and height were ...
Wikstrom E A - - 2008
The purpose of this investigation was to compare neuromuscular control variables during successful and failed jump landings in multiple directions (sagittal, diagonal, and lateral). All data were collected during a single leg hop stabilization maneuver, which required subjects to stand 70 cm from the center of a force plate, jump ...
McClure Philip - - 2007
STUDY DESIGN: Randomized controlled trial, OBJECTIVES: To compare changes in shoulder internal rotation range of motion (ROM), for 2 stretching exercises, the "cross-body stretch" and the "sleeper stretch," in individuals with posterior shoulder tightness. BACKGROUND: Recently, some authors have expressed the belief that the sleeper stretch is better than the ...
Strömbeck Christina - - 2007
The aim of this study was to examine long-term neurophysiological outcomes and sensory function in patients with obstetric brachial plexus palsy (OBPP). The same 70 children/adolescents examined in part I: functional aspects (35 males, 35 females; age range 7-20y, mean 13y 6mo [SD 4y 3mo], median 13y) were examined with ...
Strömbeck Christina - - 2007
The aims of this study were to describe the development of sequelae in obstetric brachial plexus palsy (OBPP) and to identify possible differences in functional outcome from 5 years of age to follow-up, 2 to 15 years later. A cohort of 70 participants (35 males, 35 females; age range 7-20y, ...
Takeuchi Yahiko - - 2007
By estimating the deflection velocity from the center of foot pressure (COP), this study aims to prove that the characteristics of the backward stepping reaction in the elderly are related to the strength of the antigravity muscles. The participants in this study were 10 elderly (average age 75.6+/-7.6 years) and ...
Shima Norihiro - - 2007
The effect of age on mechanomyography (MMG) has not been examined for electrically evoked contractions. Similar to torque, we expected that postactivation potentiation of the MMG would differ between young and old subjects. Additionally, under voluntary conditions, we compared normalized MMG and electromyographic (EMG) signals in relation to torque, and ...
Walton Michael J - - 2007
Normal values for shoulder assessment are imperative for the diagnosis of pathology and measurement of treatment outcome. Normal values for the United Kingdom are currently not known. This study comprised 108 control patients aged over 50 years who were under the care of one general practitioner, and the Constant score ...
McNeil Chris J - - 2007
Muscle power is more functionally relevant than static muscle strength, particularly with aging. However, the effect of age on power derived from isotonic contractions has been studied sparingly, and it has not been studied at all in subjects >75 yr of age. Thus the purpose was to investigate the magnitude ...
Nedeljkovic Aleksanda - - 2007
The purpose of the study was to explore the effect of maturation on the body size-physical performance relationship. Based on our previous study that evaluated only muscle strength, we hypothesized that the physical performance tested on pubescent subjects would be related to body size at a higher rate than predicted ...
Ojanen Tommi - - 2007
Thirty-two master athletes (shot put, discus, and hammer throw) were divided into 4 groups according to their age (T40 [40 years of age], 50 [50 years of age], 60 [60 years of age], and 75 [75 years of age]). Twenty-eight age-matched men served as controls (C40 [40 years of age], ...
De Mars Gunther - - 2007
Genotypic associations between polymorphisms in the ciliary neurotrophic factor (CNTF) and CNTF receptor (CNTFR) genes and muscular strength phenotypes in 154 middle-aged men (45-49 yr) and 138 women (38-44 yr) and 99 older men (60-78 yr) and 102 older women (60-80 yr) were tested to validate earlier association studies. Allelic ...
Thomas Lisa B - - 2008
Voice production is vital throughout life because it allows for the communication of basic needs as well as the pursuit and enjoyment of social encounters. Unfortunately, for many older individuals the ability to produce voice is altered. Structural and functional declines in the neuromuscular system occur with aging and likely ...
Coldron Yvonne - - 2008
This cross-sectional and partial longitudinal study aimed to characterize changes in rectus abdominis (RA) and provide reference ranges for the first year postpartum. Ultrasound scanning was used at four stages postnatally to measure cross-sectional area (CSA), thickness, width (indirectly using a shape value) and inter-recti distance (IRD). One hundred and ...
Anakwe R E - - 2007
Two hundred and fifty subjects were recruited. Age, sex, hand preference and anthropometric measurements were recorded for each subject. Grip strength was measured using a Jamar hydraulic dynamometer. Multiple regression analyses were performed. One hundred and seventy two subjects were men and 78 were women. Twenty-six subjects were left hand ...
Schroeder E Todd - - 2007
Older persons often lose muscle mass, strength, and physical function. This report describes the challenges of conducting a complex clinical investigation assessing the effects of anabolic hormones on body composition, physical function, and metabolism during aging. HORMA is a multicenter, randomized double masked study of 65-90-year-old community dwelling men with ...
Konishi Yu - - 2007
BACKGROUND AND PURPOSE: Gamma loop dysfunction may increase the risk of falls. Therefore, we evaluated gamma loop function in subjects hospitalized after fall injury and examined whether aging affects the gamma loop. METHODS: Maximal voluntary contraction (strength) of knee extension and integrated electromyography (I-EMG) of the quadriceps femoris were examined ...
Korotaeva T V - - 2007
Characteristic parameters of erythrocyte aggregation/disaggregation kinetics in blood samples of 200 healthy donors at native and standard hematocrit were studied. Average aggregation parameters for men and women at native hematocrit significantly differed, but these differences disappeared after hematocrit standardization, only maximal amplitude of aggregation (I(0)) at standard hematocrit in women ...
Kunelius Amanda - - 2007
OBJECTIVES: (1) To develop a normative data set for hand strength and anthropometric dimensions in automotive trim line workers. (2) To examine the relationship between trim line worker demographics and hand strength. BACKGROUND: Work tasks inherent in the automobile manufacturing industry such as forceful gripping and pinching, place physical demands ...
Fink Bernhard - - 2007
Previous studies showed that male faces with extreme features that are likely to be associated with testosterone (T) are perceived as dominant and masculine. Women were reported to prefer masculinized male faces, as they may consider T markers to be an "honest" indication of good health. However, it is also ...
Hsu Miao-Ju - - 2007
This study investigated differences in knee extensor/flexor electromyography (EMG), leg loading rate, and leg stiffness in older and younger men during stair descent. Sixteen older men (mean +/- standard deviation [SD] = 72 +/- 4.5 years) and sixteen younger men (mean +/- SD = 21.2 +/- 0.5 years) were recruited. ...
Bohannon Richard W - - 2007
BACKGROUND AND PURPOSE: Although strength diminishes with age, average values for grip strength have not been available heretofore for discrete strata after 75 years. The purpose of this meta-analysis was to provide average values for the left and right hands of men and women 75-79, 80-84, 85-89, and 90-99 years. ...
Widman Lana M - - 2007
OBJECTIVE: To determine whether the aerobic fitness, upper extremity strength, and body composition in groups of adolescents with mobility impairment due to thoracic and upper lumbar spinal cord injury (SCI) or spina bifida (SB) are significantly different from those in groups of adolescents without mobility impairment who are of normal ...
McIntire Kevin L - - 2007
Recent reports have suggested a rotational strength weakness in rotations to the concave side in patients with idiopathic scoliosis. There have been no studies presenting normative values of female adolescent trunk rotational strength to which a comparison of female adolescents with idiopathic scoliosis could be made. The purpose of this ...
Kalapotharakos Vasilios - - 2007
PURPOSE: The purpose of the present study was to evaluate the effects of 10 weeks of moderate resistance strength training followed by 6 weeks of detraining on muscle strength and jump performance in healthy, moderately active, older men, aged 61 - 75 years (mean age 68 +/- 5 years). METHODS: ...
Shim Jae Kun JK Department of Kinesiology, University of Maryland, College Park, MD 20742, USA. - - 2007
We studied the finger interactions during maximum voluntary force (MVF) production in flexion and extension in children and adults. The goal of this study was to investigate the age-related changes and flexion-extension differences of MVF and finger interaction indices, such as finger inter-dependency (force enslaving (FE): unintended finger forces produced ...
Leyk D - - 2007
Hand-grip strength has been identified as one limiting factor for manual lifting and carrying loads. To obtain epidemiologically relevant hand-grip strength data for pre-employment screening, we determined maximal isometric hand-grip strength in 1,654 healthy men and 533 healthy women aged 20-25 years. Moreover, to assess the potential margins for improvement ...
Ryan Eric D - - 2007
The purpose of this study was to examine the inter-individual variability for the patterns of responses for mechanomyographic (MMG) amplitude and mean power frequency (MPF) versus isometric torque in lower-strength (LS) and higher-strength (HS) individuals. Twelve participants (mean +/- S.D. age = 25 + 4 years) performed two isometric maximal ...
Ozcan Mutlu - - 2007
OBJECTIVES: This study evaluated the effect of two different surface conditioning methods on the repair bond strength of a bis-GMA-adduct/bis-EMA/TEGDMA based resin composite after three aging conditions. METHODS: Thirty-six composite resin blocks (Esthet X, Dentsply) were prepared (5 mm x 6 mm x 6 mm) and randomly assigned into three ...
Petrella John K - - 2007
We investigated the effects of age on changes in the force and velocity components of knee extension (KE) power during 16 weeks of traditional progressive resistance training (PRT). Thirty-one young (27 +/- 1 years, 16 men, 15 women) and 30 older (64 +/- 1 years, 14 men, 16 women) adults ...
Forrest Kimberly Y Z - - 2007
The aging process is associated with progressive declines in muscle strength, resulting in functional disability and reduced quality of life. The purpose of this epidemiological study was to examine the age-related loss of grip strength both cross-sectionally and longitudinally and the risk factors associated with the decline in muscle strength ...
Melchiorri Giovanni - - 2008
PURPOSE: Aim of this work is to compare mechanical and myoelectric manifestations of fatigue during an isometric contraction at 80% of maximal voluntary contraction (MVC) in a population of eight anorexic female patients (AN: 24.9+/-6.5 years, mean+/-SD) with respect to a group of seven healthy female subjects (CO: 30.0+/-6.6 years, ...
Kamarul T - - 2006
Hand grip strength measurement is a recognized part of hand function assessment. The standard measurement using the Jamar dynamometer and comparing these results to the recommended normal values suggested by the manufacturers of the Jamar was questioned as these values were based on Western population. A study comparing a novel ...
Proctor David N - - 2006
AIMS AND METHODS: The primary purpose was to characterize mean and individual-level patterns of change in physical functional performance over eight years (2 year intervals) in a community dwelling sample of Swedish twins (579 men and women aged 79-96 years at baseline). RESULTS: Mixed linear models revealed linear rates of ...
Miller Michael - - 2006
OBJECTIVE: An inability of the nervous system to fully activate the muscle is one factor that can contribute to age-related muscle weakness. Superimposed electrical stimulation can be used to determine voluntary muscle activation (VA). The aim of this study was to assess VA of the quadriceps muscle in healthy older ...
Olivier Isabelle I Laboratoire TIMC, Equipe Santé Plasticité Motricité, UMR CNRS 5525, UFR APS, Université Joseph Fourier, BP 53 X, 38 041 Grenoble Cedex, France. - - 2007
This study examined age-related differences in the coordinative mechanism of the reach-to-grasp movement in three groups of children aged 6, 8, and 11 year, and in healthy adults. Three prehension conditions were manipulated: an unimanual and a bimanual self-driven tasks in which the reaching and grasping of the object were ...
Leyk Dieter - - 2006
The purpose of this study was to establish an ergonomic basis for the integration of female personnel at military workplaces. The results of anthropometrical and physiological measurements of 1337 male and female subjects (aged 18-25 years) are presented. The empirical design included classical and functional body measures of high ergonomic ...
Fink Bernhard - - 2006
The ratio of the length of the second and fourth digits (2D:4D), a putative proxy of prenatal testosterone (PT), is correlated with measures of physical fitness. The relationship between the organizing effect of PT on physical fitness is likely to arise as a response to intrasexual male competition for females. ...
Marsh Anthony P - - 2006
It has been suggested that lower extremity muscle power is more important for physical function in older adults compared to strength, and that there is a nonlinear relationship between power or strength and physical function that might be indicative of a threshold above which the association between muscle function and ...
Ottenbacher Kenneth J - - 2006
To review published, randomized trials examining the effect of androgen treatment on muscle strength in older men. Systematic review using meta-analysis procedures. Computerized and manual searches. MEDLINE, EMBASE, CINAHL, and the Cochrane Register were searched for trials. Key words included testosterone, androgen, sarcopenia, muscle loss, aged, aging, elderly, older, geriatric, ...
Peters Charlotte - - 2006
PURPOSE: This study was conducted to examine androgenicity of the progestin in oral contraceptive pills and its effect on maximal leg strength in females. METHODS: Twelve participants who were using a monophasic pill containing 30 microg ethinylestradiol plus either 150 microg levonorgestrel (LEV) or 250 microg norgestimate (NOR) for at ...
Doré Eric - - 2006
This study investigated gender differences in upper-body contribution to cycle muscle power in 23 adolescents. All subjects performed two 5-s and one 20-s cycling sprint, using two protocols: with handgrip (WG) and without handgrip (WOG). Maximal handgrip strength was assessed for each individual. Absolute peak and mean cycling power was ...
Burroughs Brian R - - 2006
BACKGROUND: The advent of highly crosslinked polyethylene has allowed the re-evaluation of the use of femoral heads larger than 32 mm for metal-on-polyethylene total hip arthroplasties. However, the effect of larger heads on the frictional torque of highly crosslinked polyethylene is unknown. METHODS: We performed an in vitro examination of ...
Goodpaster Bret H - - 2006
BACKGROUND: The loss of muscle mass is considered to be a major determinant of strength loss in aging. However, large-scale longitudinal studies examining the association between the loss of mass and strength in older adults are lacking. METHODS: Three-year changes in muscle mass and strength were determined in 1880 older ...
Carville Serena F - - 2007
Decreased steadiness of muscle force may be associated with ageing and could be a cause of falls in older people. We studied this in isometric and anisometric quadriceps contractions in healthy young and older people. The older group contained people with and without a history of medically unexplained falls. Forty-four ...
Tsepis Elias - - 2006
We evaluated whether quadriceps and hamstrings weakness depended on chronicity in amateur athletes with anterior cruciate ligament deficiencies. We hypothesized that the weakness would not recover to the level of healthy control subjects without structured rehabilitation. Secondarily, we asked whether quadriceps and hamstrings side-to-side percent asymmetry in strength was consistent ...
Charles L E - - 2006
In certain occupations, including farm work, workers are exposed to hazardous substances, some of which are known to be toxic to the nervous system and may adversely affect muscle strength. Measurement of hand-grip strength may be useful for detecting neurotoxic exposure. The authors studied 3522 participants of the Honolulu Heart ...
Wolkow Catherine A - - 2006
A major feature of aging is a reduction in muscle strength from sarcopenia, the loss of muscle mass. Sarcopenia impairs physical ability, reduces quality of life and increases the risk of fall and injury. Since aging is a process of stochastic decline, there may be many factors that impinge on ...
Saengpattrachai Montri - - 2006
This report describes three males from a single kinship, ages 7, 8, and 67 years with clinically asymptomatic dystrophinopathy. The index case was an 8-year-old male evaluated for asymptomatic but persistently elevated serum creatine kinase levels. Muscle biopsy demonstrated a mild myopathy, without necrotic fibers. Immunostaining for dystrophin revealed a ...
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