Search Results
Results 401 - 450 of 1420
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Ruan Mianfang - - 2008
This study investigated the influence of a horizontal approach to mechanical output during drop jumps. Participants performed drop jumps from heights of 15, 30, 45, and 60 cm with zero, one, two, and three approach steps. The peak summed power during the push-off phase changed quadratically across heights (6.2 +/- ...
Lecours Julie J Centre de recherche interdisciplinaire en réadaptation, Institut de réadaptation de Montréal, - - 2008
To assess the interaction of foot placement, trunk frontal position, weight-bearing and knee moment asymmetry at seat-off when rising from a chair. Cross-sectional study. Seventeen subjects with hemiparesis and 15 healthy controls. Trunk position, weight-bearing and knee moment asymmetry were quantified by kinetic and kinematic analysis when the subjects rose ...
Furukawa Fumiko F School of Nursing, University of Shizuoka, Shizuoka, - - 2008
Increased fibrinogen levels may trigger cardiac events in patients with atherosclerosis. Early control of fibrinogen levels before the progression of atherosclerosis that occurs with aging and menopause may benefit women, but the effects of exercise on fibrinogen levels as a preventive value have not been examined in early to middle ...
Biscarini A - - 2008
We developed an analytical biomechanical model for leg-extension equipment and the associated knee-extension/flexion exercises. The shear component, phi(t), of the tibiofemoral joint load was calculated taking into account all the fundamental elements of the equipment mechanics (resistance pad placement, cam/pulley system geometry, selected weight stack, etc.) and the instantaneous values ...
Liem Dennis - - 2008
BACKGROUND: Arthroscopic release of the capsule is a popular treatment option for chronic refractory frozen shoulder. Additional release of the intra-articular part of the subscapularis is controversial regarding possible impairment of subscapularis function. HYPOTHESIS: Arthroscopic release of the intra-articular part of the subscapularis produces good clinical results and does not ...
McWhorter J Wesley - - 2008
Health care practitioners, including sports physical therapists, commonly prescribe and recommend aerobic exercise for those patients seeking to improve their cardiovascular fitness across all ages. Current literature demonstrates that weight bearing activities such as walking or running may lead to foot and ankle edema. The purpose of this study is ...
Bolgla Lori A - - 2008
CONTEXT: Knee extension exercise is an important part of knee rehabilitation. Clinicians prescribe non-weight bearing exercise initially and progress patients to weight bearing exercise once they can perform a straight leg raise (SLR). OBJECTIVE: Compare VM activation during a SLR and weight bearing exercises. DESIGN: One-way repeated measures design. Setting: ...
Seo Na Jin - - 2008
OBJECTIVE: The effects of handle friction and torque direction on muscle activity and torque are empirically investigated using cylindrical handles. BACKGROUND: A torque biomechanical model that considers contact force, friction, and torque direction was evaluated using different friction handles. METHODS: Twelve adults exerted hand torque in opposite directions about the ...
Folland Jonathan - - 2008
The aim of this study was to determine the extent to which the resistance provided by variable-cam resistance training machines match joint torque capability. Eight variable-cam knee extension machines from six different manufacturers were assessed. Resistive torque for a constant weight/load was measured at five knee joint angles. Knee extensor ...
Weiss Rüdiger J - - 2008
The purpose of this study was to analyse kinematic and kinetic gait changes in rheumatoid arthritis (RA) patients in comparison to healthy controls and to examine whether levels of functional disability (Health Assessment Questionnaire (HAQ)-scores) were associated with gait parameters. Using a three-dimensional motion analysis system, kinematic and kinetic gait ...
Pandit H - - 2008
The in vivo kinematics of 10 patients after combined anterior cruciate ligament reconstruction (ACLR group) and Oxford unicompartmental knee arthroplasty (UKA) was compared to those of 10 Oxford UKA patients with an intact ACL (ACLI group) and a group of 22 normal knees. The kinematics during a step-up exercise and ...
Lin Wei-Hsiu - - 2009
The purpose of this study was to: (1) compare unilateral ankle eversion to inversion strength ratio (E/I R) and static balance control in the dominant and non-dominant limbs and (2) determine the relationship between ankle E/I R and static balance control in the dominant and non-dominant limbs. Twenty-eight young, healthy ...
Mesfar W - - 2008
BACKGROUND: Different rehabilitation exercises such as open-kinetic-chain flexion and extension exercises are currently employed in non-operative and post-operative managements of joint disorders. The challenge is to strengthen the muscles and to restore the near-normal function of the joint while protecting its components (e.g., the reconstructed ligament) from excessive stresses. METHODS: ...
Stoelting, Kelli
Rehabilitation of the shoulder can be a complex process with an approach that is constantly changing. In order to be successful in the rehabilitation process, a complete understanding of the cause of injury and an accurate diagnosis is required2. Researchers are constantly testing new ideas and working to improve the ...
Siatras Theophanis A - - 2008
Although several studies have investigated the acute effect of static stretching exercises, the duration of exercises that negatively affects performance has not been ascertained. This study was conducted to determine the acute effect of different static stretching durations on quadriceps isometric and isokinetic peak torque production. The 50 participants were ...
Jan Mei-Hwa - - 2008
STUDY DESIGN: A randomized clinical trial design. OBJECTIVE: To investigate the efficacy of high, repetitive, target-matching foot-stepping exercise (TMFSE) performed in a sitting position on proprioception, functional score, and walking velocity for patients with knee osteoarthritis (OA). BACKGROUND: Researchers have suggested that exercises to address knee OA should include proprioceptive ...
Waryasz Gregory R - - 2008
BACKGROUND: Patellofemoral Pain Syndrome (PFPS), a common cause of anterior knee pain, is successfully treated in over 2/3 of patients through rehabilitation protocols designed to reduce pain and return function to the individual. Applying preventive medicine strategies, the majority of cases of PFPS may be avoided if a pre-diagnosis can ...
Ozawa Takahisa - - 2008
A new type of 'Passive Exercise Equipment' has been developed, which can induce muscular contraction of the functional muscles around knee joint. Not only user s who are not eager to exercise but also patients with both type 2 diabetes and knee joint osteoarthritis can perform exercise just by following ...
Bonnetblanc François - - 2008
Fitts's law states that movement time (MT) is related to precision (index of difficulty, ID). The introduction of a new effector in a Fitts's task induces an increase of the MT/ID slopes (Langolf et al., 1976). It is unclear, however, whether kinetics or pure coordinative constraints based on the introduction ...
Kawasaki Takayuki - - 2008
We have previously demonstrated the efficacy of therapeutic exercise for osteoarthritis (OA) of the knee. This study was performed to examine the additive effects of glucosamine or risedronate on the exercise therapy. In this study, 142 female patients with moderate OA of the knee, who had been recommended to undergo ...
Fraenkel Liana - - 2008
PURPOSE: Exercise is an important adjunctive treatment for knee OA; however it is underutilized, in part because of the known difficulties related to initiating and adhering to exercise programs. Although there are ample data documenting the latter, patient preferences for exercise in comparison to other options have not been examined. ...
Grodski Mark - - 2008
To enable a safe, effective return to daily functional activities and to prevent premature knee joint osteoarthritis, adults undergoing anterior cruciate ligament (ACL) surgery require carefully designed and appropriate rehabilitation strategies. In this article we critically examine the contemporary body of literature concerning the application and outcomes of various knee ...
Fox Jason - - 2008
Inversion ankle sprains can lead to a chronic condition called functional ankle instability (FAI). Limited research has been reported regarding isokinetic measures for the plantar flexors and dorsiflexors of the ankle. To examine the isokinetic eccentric torque measures of the ankle musculature in participants with stable ankles and participants with ...
Fransen Marlene - - 2008
Biomechanical factors, such as reduced muscle strength and joint malalignment, have an important role in the initiation and progression of knee osteoarthritis (OA). Currently, there is no known cure for OA; however, disease-related factors, such as impaired muscle function and reduced fitness, are potentially amenable to therapeutic exercise. To determine ...
Clisby Elizabeth F - - 2008
A principal cause of subacromial impingement (SAI) is failure of the rotator cuff to center the humeral head in the glenoid during shoulder motion, counteracting the effect of the deltoid. As rehabilitation of the rotator cuff endeavors to restore balance between these muscle groups, the purpose of this companion study ...
Yuktasir Bekir - - 2009
The purpose of the present study was to investigate the long-term effects of two different stretching techniques on the range of motion (ROM) and on drop jump (DJ). DJ scores were assessed by means of a contact mat connected to a digital timer. ROM was measured by use of a ...
Wang Yangyang - - 2007
Five entangled melts, with the number of entanglements per chain ranging from 25 to 160, have been studied to illustrate how cohesive strength can be overcome in either continuous or interrupted extension (i.e., during or after uniaxial stretching). The internal elastic stress due to chain deformation from imposed strain appears ...
Howe T E - - 2009
Exercise is recommended as a non-pharmacological, non-invasive intervention for osteoarthritis (OA) of the knee. Physiological data concerning the duration and intensity of muscle activity or physical activity profiles during normal daily activity for this population is lacking. Our aim was to explore this using surface Electromyography (EMG) and accelerometer-based activity ...
Shin Choongsoo S - - 2007
Following ACL injury a reduction in the peak knee flexion moment during walking (thought to be created by a decrease of quadriceps contraction) has been described as an adaptation to reduce anterior tibial translation (ATT) relative to the femur. However, the amount of ATT caused by quadriceps contraction is influenced ...
Blaney Davidson E N - - 2007
OBJECTIVE: Osteoarthritis (OA) is characterized by cartilage damage, synovial fibrosis, and osteophyte formation. Both transforming growth factor beta (TGFbeta) and bone morphogenetic protein 2 (BMP-2) can induce the formation of osteophytes during OA, but their specific role in this process is unclear. The purpose of this study was to investigate ...
Kanai Akira - - 2008
The purpose of this study was to investigate the effectiveness and safety of ambulatory training in patients with acetabular dysplasia. To achieve this, we studied the hip joint moment in subjects walking with laterally and horizontally elevated arms and changing speeds as a form of training to strengthen hip joint ...
Benjaminse Anne - - 2008
To examine the kinematic characteristics of the hip and knee during a single-leg stop-jump task before and after exercise-to-fatigue, and to determine if the fatigue response is gender-dependent. Lower extremity kinematic measurements were taken of male and female subjects while they performed a sports functional task before and after fatigue ...
Cagnie Barbara - - 2008
The purpose of this study was to investigate the recruitment pattern of deep and superficial neck flexors evoked by three different cervical flexion exercises using muscle functional MRI. In 19 healthy participants, transverse relaxation time (T2) values were calculated for the longus colli (Lco), longus capitis (Lca), and sternocleidomastoid (SCM) ...
Rohlmann Antonius - - 2008
BACKGROUND: Little is known about the loads acting on a vertebral body replacement within the first month postoperatively. Among other things, such data are required for choosing the optimal rehabilitation program for a patient and for evaluating the efficacy of aids like crutches and braces. METHODS: Telemeterized vertebral body replacements ...
Ianuzzi Allyson - - 2009
Quadruped animal models have been validated and used as biomechanical models for the lumbar spine. The biomechanics of the cat lumbar spine has not been well characterized, even though it is a common model used in neuromechanical studies. Compare the physiological ranges of motion and determine torque-limits for cat and ...
Buteau Josephine L - - 2007
Traditional rehabilitation for shoulder dislocation has a success rate of only 20%. The body blade has been hypothesized to strengthen the muscles stabilizing the shoulder girdle by training the contractile tissues directly and also indirectly affecting the joint and surrounding noncontractile tissues when responding to rapid positional changes and mechanical ...
Flanagan Sean P - - 2007
Bilateral movements are common in human movement, both as exercises and as daily activities. Because the movement patterns are similar, it is often assumed that there are no bilateral differences (BDs; differences between the left and right sides) in the joint torques that are producing these movements. The aim of ...
Ogrodzka Katarzyna - - 2007
BACKGROUND: The main goal of this study was to estimate the variability of gait parameters in patients diagnosed with arthroplasty of the knee joint. Angular changes of the knee joint in three planes, and spatio-temporal parameters of gait were analysed. MATERIALS AND METHODS: A three-dimensional analysis of locomotion patterns was ...
Noé Frédéric - - 2009
The present study investigates the mechanisms underlying changes in postural strategy that occur to compensate for mechanical ankle joint restrictions induced by wearing ski-boots during postural exercises. Fourteen experienced skiers were asked to stand as still as possible in a stable (STA) posture and in 2 postures with instability in ...
Hasegawa M - - 2008
OBJECTIVE: Intra-articular injection of hyaluronan (HA) is frequently used to treat knee osteoarthritis (OA). We studied whether HA injections induced significant changes in levels of biochemical markers in synovial fluid (SF). In addition, we investigated the possibility of predicting the effectiveness of HA based on these biochemical markers. METHODS: Twenty-eight ...
Kontaxis Andreas - - 2008
Scapula motion is significant for support of the arm and stability of the shoulder. The effect of the humeral elevation on scapular kinematics has been well investigated for normal subjects, but there are limited published studies investigating adaptations after shoulder arthroplasty. Scapula kinematics was measured on 10 shoulders (eight subjects) ...
Mesfar W - - 2008
Open kinetic chain (OKC) extension exercises are commonly performed to strengthen quadriceps muscles and restore joint function in performance enhancement programs, in exercise therapies and following joint reconstruction. Using a validated 3D nonlinear finite element model, the detailed biomechanics of the entire joint in OKC extension exercises are investigated at ...
Wiater J Michael - - 2007
The inferior capsular shift procedure described by Neer is an effective treatment for multidirectional shoulder instability. To determine the amount of volume reduction that occurs with the inferior capsular shift procedure, 13 cadaver shoulders were dissected down to the capsule. A viscous liquid was injected into each shoulder and the ...
Kokkonen Joke - - 2007
PURPOSE: This study investigated the influence of static stretching exercises on specific exercise performances. METHODS: Thirty-eight volunteers participated in this study. The stretching group (STR) consisted of 8 males and 11 females whose activity was limited to a 10-wk, 40-min, 3-d.wk(-1) static stretching routine designed to stretch all the major ...
Mottram Sarah L - - 2009
Exercises to retrain the orientation of the scapula are often used by physiotherapists to optimise shoulder girdle function. The movements and muscle activity required to assume this position have not yet been quantified. Further, patients often find this a difficult exercise to learn accurately, with no data being available on ...
Reinold Michael M - - 2007
Investigators have observed electromyographic (EMG) activity of the supraspinatus muscle and reported conflicting results. To quantify EMG activity of the supraspinatus, middle deltoid, and posterior deltoid muscles during exercises commonly used in rehabilitation. One-factor, repeated-measures design. Controlled laboratory. Twenty-two asymptomatic subjects (15 men, 7 women) with no history of shoulder ...
Kawahara Y - - 2008
To investigate whether low FiO2 affects muscle oxygenation and the rate of decline in peak torque (DR) during isokinetic knee extension, subjects performed 50 isokinetic knee extensions at 180 degrees /s and at 0.5 Hz while inhaling low O2 gas (12 %O2; H) or air (N). Muscle oxygenation kinetics was ...
Lu Tung-Wu - - 2007
PURPOSE: To determine the joint loading during elliptical exercise (EE) by a detailed three-dimensional dynamic analysis, and to compare the results with those during level walking. METHODS: Fifteen male adults performed level walking and EE while 3D kinematic data, right pedal reaction forces (PRF), and ground reaction forces (GRF) were ...
Hanna Fahad - - 2007
OBJECTIVE: Exercise has been strongly promoted for the prevention of the major diseases of aging in women, such as cardiovascular disease and osteoporosis. However, conflicting data exist as to whether exercise benefits joint health and thus helps protect against degenerative processes such as knee osteoarthritis. The aim of this study ...
Laheru Dhruvkumar - - 2007
OBJECTIVE: To improve the reproducibility of testing hip abduction and adduction using an isokinetic dynamometer by a novel testing protocol. DESIGN: Test-retest design. SETTING: Biodynamics laboratory. PARTICIPANTS: Fifteen healthy subjects (9 men, 6 women; age, 22.4+/-0.5 y) were recruited. INTERVENTIONS: Two setups were compared: the first according to manufacturer's guidelines ...
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