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Results 301 - 350 of 1438
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Stevens Michael C MC Olin Neuropsychiatry Research Center, Institute of Living/Hartford Hospital, Hartford, Connecticut 06106, USA. - - 2009
This study examined how the mutual interactions of functionally integrated neural networks during resting-state fMRI differed between adolescence and adulthood. Independent component analysis (ICA) was used to identify functionally connected neural networks in 100 healthy participants aged 12-30 years. Hemodynamic timecourses that represented integrated neural network activity were analyzed with ...
Albert Djana - - 2010
The aim of the study was to assess conceptual thinking in children in relation to age and motor dominance. We investigated the effect of the right and the left hand in a fluency task in four groups of 127 healthy right-handed children (age 5-12 years) and an adult control group. ...
Cumberland Susan A - - 2009
Silver nanoparticles (Ag NPs) are becoming increasingly popular as antimicrobial agents in consumer goods with consequent risk to environmental health from discharges. Environmentally relevant fate and transport investigations are limited but essential to gain understanding towards bioavailability and toxicology. In this study, monodisperse 15nm citrate-stabilised Ag NPs were synthesised, characterised ...
Booth F W - - 2010
Remarkably, 80-year-old humans who have partaken in lifelong aerobic or strength training have maximal aerobic capacities or muscle strengths comparable with that of sedentary individuals aged 50 or 55-year-old, respectively. Such delays in functional aging are clinically significant because lower aerobic and lower strength capacities increase the risk of premature ...
Ling Shari M - - 2009
OBJECTIVE: To examine motor unit characteristics (size and firing rate) associated with aging. DESIGN: Cross-sectional, observational. SETTING: Community. PARTICIPANTS: Baltimore Longitudinal Study of Aging participants (N=102), aged 22.2 to 94.1 years, were studied. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Surface-represented motor unit size and firing rate were collected from the ...
Schilling Brian K - - 2009
Previous investigations have demonstrated leg strength deficits in persons with Parkinson's disease (PD) as compared to neurologically-normal adults. However, the exact mode of contraction by which strength is assessed may determine how closely such deficits are related to functional performance. The purpose of this study was to better understand the ...
Beus Jeremy M - - 2010
This study examined the relationship between the organizational tenure of employees at a given worksite and safety climate strength (i.e., the variability of employees' perceptions of the policies, procedures, and practices regarding workplace safety). Results revealed that average worksite tenure was related to safety climate strength such that higher average ...
Severinghaus Jeffrey P - - 2009
Photosynthesis and respiration occur widely on Earth's surface, and the 18O/16O ratio of the oxygen produced and consumed varies with climatic conditions. As a consequence, the history of climate is reflected in the deviation of the 18O/16O of air (delta18Oatm) from seawater delta18O (known as the Dole effect). We report ...
Stodden David - - 2009
We examined the relationship between competence in three fundamental motor skills (throwing kicking, and jumping) and six measures of health-related physical fitness in young adults (ages 18-25). We assessed motor skill competence using product scores of maximum kicking and throwing speed and maximum jumping distance. A factor analysis indicated the ...
Salo Petri K - - 2009
STUDY DESIGN: Cross-sectional study. OBJECTIVES: To assess age-related changes and determine reference values for passive range of motion of the cervical spine in healthy women of working age. BACKGROUND: Although cervical mobility is age dependent, the amount in which aging affects passive range of motion has not been previously reported. ...
Joshi Meesha - - 2009
Bilateral hand-grip strength was studied in 21 male volunteers (M age = 25.6 yr., SD = 5.2). All were assessed before and after five practice sessions of 20 min. duration: right-nostril yoga breathing, left-nostril yoga breathing, alternate-nostril yoga breathing, breath awareness, and a no-intervention session. Data were analyzed with analyses ...
Taeymans Jan - - 2009
This longitudinal study analyses the development and predictability of static strength and their interactions with maturation in youth. Of 515 children followed annually from age 6 to 18 years, 59 males and 60 females were measured again at age 35. Early, average, and late maturity groups were established. Body height ...
Poulis I - - 2009
The relation of leg preference and muscular strength in elite fencers was examined. The dominant and nondominant extensor and flexor muscles of 30 elite fencers (M age = 18.2 yr., SD = 2.0 yr.; M height = 173 cm, SD=7.4 cm; M weight = 62.7 kg, SD=8.9 kg), who were ...
Forbes H - - 2009
This study aimed to establish the effect of age and pubertal development on relative peak torque in youth footballers. One hundred and fifty-seven subjects were arranged into U12-U18 age groups; of these 133 also completed a self-reporting measure of pubertal development (PDS) and were grouped accordingly. Bilateral isokinetic testing included ...
Wyszomierski Sarah A - - 2009
Slips and falls are a serious public health concern in older populations. Reduced muscle strength is associated with increased age and fall incidence. Understanding the relationships between specific joint muscle strength characteristics and propensity to slip is important to identify biomechanical factors responsible for slip-initiated falls and to improve slip/fall ...
Gillette Jason C - - 2009
Farm youth commonly perform animal care tasks such as feeding and watering. The purpose of this study was to determine the effects of age, bucket size, loading symmetry, and amount of load on upper body moments during carrying tasks. Fifty-four male and female participants in four age groups (8-10 years, ...
Simões Rodrigo Polaquini - - 2009
CONTEXT AND OBJECTIVES: Respiratory muscle strength is relevant to the clinical situation of elderly patients, particularly those presenting with respiratory or cardiac diseases. The objectives of this study were to evaluate the respiratory muscle strength of institutionalized elderly women, compare this with predicted values for the Brazilian population and calculate ...
Vetter Rheba E - - 2009
The purpose of this study was to observe the effects of Partner's Improvisational Resistance Training (PIRT) on muscular strength, body circumference, and body fat percentage in 10 female college-age dancers in comparison with 8 female dancers in a control group. The PIRT program, based on the concepts of manual resistance ...
Moreau Noelle G NG Department of Health Professions, Medical University of South Carolina, Charleston, SC 29425, USA. - - 2009
Our aim was to investigate muscle architecture and size of the rectus femoris (RF) and vastus lateralis (VL) in children and adolescents with cerebral palsy (CP) compared with age-matched typically developing participants. Muscle architecture and size were measured with ultrasound imaging in 18 participants with spastic CP (9 females, 9 ...
Pel-Littel R E - - 2009
Older, more vulnerable individuals are increasingly often described in the literature as being frail. Because frailty is often perceived as being undesirable and associated with high health risks, it is important to establish how we can predict, recognize, and treat frailty. Frailty is predisposed by advancing age in combination with ...
Cheyne Stanley A - - 2009
A brief history and analysis of the great highland bagpipe will be discussed. Although the bagpipe may have originated several thousands of years ago, the great highland bagpipe, distinguished by three drones and a chanter, is only a few hundred years old. A discussion of the components and operation will ...
Creque, Sara M.
Annual Report to Division of Fisheries, Illinois Department of Natural Resources. F-123-R-10
Forbes H - - 2009
This study aimed to analyse the effect of age on muscle peak torque (PT), and Hamstring (H): Quadricep (Q) ratio in elite youth footballers. To date, no study has considered age-group playing level and pubertal development in this population. One hundred and fifty-seven elite youth footballers in the age groups ...
Camargo Paula Rezende - - 2009
This study compared peak torque and torque steadiness during isometric abduction in subjects with subacromial impingement syndrome (SIS) and those with no upper limb disorders. The SIS group consisted of 27 subjects (33.48 +/- 9.94 years) with unilateral SIS. The control group consisted of 23 healthy and active subjects (32.26 ...
Werle S - - 2009
Assessment of hand strength is used in a wide range of clinical settings especially during treatment of diseases affecting the function of the hand. This investigation aimed to determine age- and gender-specific reference values for grip and pinch strength in a normal Swiss population with special regard to elderly and ...
Koley Shyamal - - 2009
The present study deals with the correlations of dominant hand grip strength and 12 anthropometric variables, namely, height, weight, BMI, upper arm length, forearm length, total arm length, hand breadth, hand length, upper arm circumference, forearm circumference, biceps skinfold and triceps skinfold in randomly selected 303 unrelated, normal, healthy students ...
Dey Debashish K - - 2009
OBJECTIVE: The purpose of this study was to explore the association between body composition in the elderly and subsequent changes in muscle strength during aging. METHODS: This was a longitudinal study with a 5-y follow-up. Eighty-seven men (n = 38) and women (n = 49) from a random sample of ...
Sell Aaron A Center for Evolutionary Psychology, University of California, Santa Barbara, CA 93106, USA. - - 2009
Selection in species with aggressive social interactions favours the evolution of cognitive mechanisms for assessing physical formidability (fighting ability or resource-holding potential). The ability to accurately assess formidability in conspecifics has been documented in a number of non-human species, but has not been demonstrated in humans. Here, we report tests ...
Ebben William P - - 2009
This study assessed bilateral facilitation and laterality during countermovement jumps. 23 NCAA Division-I athletes (13 men, 10 women) who participated in track and field volunteered to serve as participants and performed bilateral, right, and left leg countermovement jumps on a force plate. Dependent variables included jump height, reactive strength index, ...
Macedo Luciana Gazzi - - 2009
The purposes of this study were to investigate whether age influences passive range of motion (PROM) in women and to compare obtained values with other available data. Ninety healthy Caucasian women from 18 to 59 years of age had the PROM of their ankle, knee, hip, shoulder, elbow, and wrist ...
Moosmayer S - - 2009
We undertook clinical and ultrasonographic examination of the shoulders of 420 asymptomatic volunteers aged between 50 and 79 years. MRI was performed in selected cases. Full-thickness tears of the rotator cuff were detected in 32 subjects (7.6%). The prevalence increased with age as follows: 50 to 59 years, 2.1%; 60 ...
John Emmanuel B - - 2009
PURPOSE: The ability of older adults to perform activities of daily living (ADL) declines with age. One possible reason could be that older adults require substantially greater effort than younger adults to perform similar ADL. This study examined the effects of age on the biomechanics of muscular effort in healthy ...
Nuzzo James L - - 2009
The primary purpose of this investigation was to provide a descriptive analysis of lower-body strength and vertical jump performance in overweight male (n = 8) and female (n = 13) adolescents. Maximal strength was tested in the leg press and isometric squat. Kinetic and kinematic variables were assessed in vertical ...
Domire Zachary J ZJ Biomechanics Lab, Division of Orthopedic Research, Mayo Clinic, Rochester, MN, - - 2009
A common complication associated with aging is the stiffening of skeletal muscles. The purpose of this study was to determine the ability of magnetic resonance elastography (MRE) to study this phenomenon in vivo. Twenty female subjects were included in the study with an age range of 50 to 70 years. ...
Kim H Mike HM Department of Orthopaedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, MO 63110, - - 2009
Normative data are essential to the evaluation of shoulder function. The purposes of this study were to establish a normative database of isometric shoulder strength measured in asymptomatic individuals verified to have intact rotator cuffs and to determine the effect of asymptomatic rotator cuff tears on shoulder strength. Two hundred ...
Di Giminiani Riccardo - - 2009
The aim of this study was to assess the effects of 8 weeks of whole-body vibrations on explosive and reactive leg strength. Thirty-three physically active students took part in the study and were randomly assigned to an individualized-vibration group, a fixed-vibration group or a control group. The frequency of vibration ...
Johnson Olubusola E - - 2009
BACKGROUND AND OBJECTIVE: Studies on back extensor endurance in adolescents are scarce. This study sought to establish reference data and pattern of back extensor endurance in school-aged adolescents with and without low-back pain (LBP) from Nigeria. SUBJECTS AND METHODS: This study recruited 625 adolescents aged 11 to 19 years from ...
Kolber Morey J - - 2009
Shoulder disorders attributed to weight training are well documented in the literature; however, a paucity of evidence-based research exists to describe risk factors inherent to participation. Shoulder joint and muscle characteristics in the recreational weight training (RWT) population were investigated to determine specific risk-related adaptations that may occur from participation. ...
Roy Jean-Sébastien - - 2009
Different measurements are used to assess shoulder function, including range of motion, strength, functional performance and self-report function. To understand disablement, it is necessary to understand the relationship between impairments and function in persons without shoulder problems. This study was conducted to enhance existing comparative data in subjects without upper ...
Potter Nancy L - - 2009
The authors examined and compared the development of oral and manual force control in preschool-aged children. In all, 50 typically developing children (aged 3-5 years) performed maximal strength tasks and submaximal visually guided tasks using tongue elevation, power, and precision grips. Dependent measures included strength, rate of force rise, initial ...
Kararizou Evangelia - - 2009
The purpose of the present study is to investigate the age-related changes in muscle biopsies from the quadriceps femoris in male subjects of different ages. A histological and histochemical study was performed on specimens from the quadriceps femoris from 8 males divided into two groups, under 50 and over 70 ...
Kaur Maninder - - 2009
The aim of this study was to investigate the age-related changes in hand grip strength (both right and left hand) among rural and urban Jat females and its correlation with various anthropometric variables. The present cross-sectional study was based on a sample of 600 Jat females (rural=300, urban=300), ranging in ...
Yoshihara A - - 2009
BACKGROUND: The turning point in the deterioration of physical function seems to occur between the ages of 70 and 80 years. In particular, muscle strength may decline even more in subjects older than 75. A recent study found that the angiotensin-converting enzyme (ACE) genotype also affects physiological left ventricular hypertrophy. ...
Bohannon Richard W - - 2009
The purpose of this study was to validate the ability of body weight-normalized knee extension strength to explain sit-to-stand (STS) independence in home care patients. Isometric knee extension force of 31 seated patients (mean age 72.8 years) was measured with a handheld dynamometer. The combined force of both knees was ...
Mbada Chidozie Emmanuel - - 2009
OBJECTIVE: This study aimed to establish gender and age reference values of static back extensor muscle endurance in healthy Nigerian adults. SUBJECTS AND METHODS: This study involved 373 consecutive participants aged between 21 and 60 years who were grouped into four age strata. A modification of the Sørensen test of ...
Myer Gregory D - - 2009
OBJECTIVE: To determine the association of quadriceps and hamstrings strength to anterior cruciate ligament (ACL) injury risk in female athletes. The primary hypothesis was that there would be decreased knee flexor and increased knee extensor strength in female athletes who went on to ACL injured status (FACL) compared to uninjured ...
Di Giulio C - - 2009
Sarcopenia is the physiological age-related reduction of muscle mass and strength. Considering that life span is correlated with metabolic rate and mitochondria are the site of oxygen consumption, muscle mitochondria volume densities were determined by morphometric analysis. We found a tight correlation between aging and hypoxia with decrease in muscle ...
Jayabalan M - - 2009
The effect of reinforcement in the cross-linked poly(propylene fumarate-co-caprolactone diol) thermoset composites based on Kevlar fibres and hydroxyapatite was studied. Cross-linked poly(propylene fumarate-co-caprolactone diol) was also studied without any reinforcement for comparison. The reinforcing fibre acts as a barrier for the curing reaction leading to longer setting time and lesser ...
Saimpont Arnaud - - 2009
Normal aging significantly influences motor and cognitive performance. Little is known about age-related changes in action simulation. Here, we investigated the influence of aging on implicit motor imagery. Twenty young (mean age: 23.9+/-2.8 years) and nineteen elderly (mean age: 78.3+/-4.5 years) subjects, all right-handed, were required to determine the laterality ...
Su Eileen Lee Ming EL Department of Bioengineering, Imperial College London, United Kingdom. - - 2009
This study examines micromanipulation accuracy in pointing and in tracing a circle, using a novel contact-free measurement system. Three groups of subjects enable us to investigate the influence of age and micromanipulation expertise. The results show that, for all groups of subjects, a 10x magnification increases accuracy, but larger magnification ...
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