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Emmy K. L. Wong - One of the best experts on this subject based on the ideXlab platform.
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Isokinetic Work Profile of Shoulder Flexors and Extensors in Sport Climbers and Nonclimbers
The Journal of orthopaedic and sports physical therapy, 2008Co-Authors: Emmy K. L. WongAbstract:Study Design Cross-sectional, 2-group comparison, experimental laboratory study. Objectives Examining and comparing the work profiles of the Shoulder Flexors and extensors between sport climbers and nonclimbers. Background Sport climbing places high demands on the Shoulder, which could lead to unique work profiles of the agonist/antagonist muscle groups. Methods and Measures Isokinetic work output of the dominant Shoulder Flexors and extensors of 31 sport climbers and 27 nonclimbers were measured from 0° to 180° of flexion at a test speed of 60°/s. Profiles for work data (concentric flexion [conFlex], eccentric flexion [eccFlex], concentric extension [conExt], eccentric extension [eccExt]) normalized to body mass, conventional work ratios (conFlex/conExt and eccFlex/eccExt), and functional work ratios (eccFlex/conExt and eccExt/ conFlex) were developed for both climbers and nonclimbers. Results All work profiles were different between the 2 groups (P
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isokinetic work profile of Shoulder Flexors and extensors in sport climbers and nonclimbers
Journal of Orthopaedic & Sports Physical Therapy, 2008Co-Authors: Emmy K. L. Wong, Gabriel Y F NgAbstract:Study Design Cross-sectional, 2-group comparison, experimental laboratory study. Objectives Examining and comparing the work profiles of the Shoulder Flexors and extensors between sport climbers and nonclimbers. Background Sport climbing places high demands on the Shoulder, which could lead to unique work profiles of the agonist/antagonist muscle groups. Methods and Measures Isokinetic work output of the dominant Shoulder Flexors and extensors of 31 sport climbers and 27 nonclimbers were measured from 0° to 180° of flexion at a test speed of 60°/s. Profiles for work data (concentric flexion [conFlex], eccentric flexion [eccFlex], concentric extension [conExt], eccentric extension [eccExt]) normalized to body mass, conventional work ratios (conFlex/conExt and eccFlex/eccExt), and functional work ratios (eccFlex/conExt and eccExt/ conFlex) were developed for both climbers and nonclimbers. Results All work profiles were different between the 2 groups (P<.001). All normalized work data were higher in climbers...
Björn Gerdle - One of the best experts on this subject based on the ideXlab platform.
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Randomized Controlled Trial of Physiotherapy and Feldenkrais Interventions in Female Workers with Neck-Shoulder Complaints
Journal of Occupational Rehabilitation, 1999Co-Authors: Inga Lundblad, Jessica Elert, Björn GerdleAbstract:The present study aimed to investigate whether physiotherapy or Feldenkrais interventions resulted in a reduction of complaints from the neck and Shoulders (prevalence, pain intensity, sick leave, and disability in leisure and work roles) in 97 female industrial workers (not on long-term sick leave). Range of motion of neck and Shoulders, VO_2, endurance score (i.e., summation of pain intensity ratings during a static Shoulder flexion), cortical control according to the Feldenkrais methodology, and physiological capacity according to a dynamic endurance test of the Shoulder Flexors with simultaneous surface EMG were also recorded. The workers were randomized to: (1) physiotherapy group (PT-group; treatment according to the ergonomic program of the PTs of the occupational health care service), (2) Feldenkrais group (F-group; education according to the Feldenkrais methodology), or (3) control group (C-group; no intervention). Pre- and post-tests were made at one-year intervals. The two interventions lasted 16 weeks during paid working time. The F-group showed significant decreases in complaints from neck and Shoulders and in disability during leisure time. The two other groups showed no change (PT-group) or worsening of complaints (C-group). The present study showed significant positive changes in complaints after the Feldenkrais intervention but not after the physiotherapy intervention. Possible mechanisms behind the effects in the F-group are discussed.
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Effect of a general fitness program on musculoskeletal symptoms, clinical status, physiological capacity, and perceived work environment among home care service personnel
Journal of Occupational Rehabilitation, 1995Co-Authors: Björn Gerdle, Christine Brulin, Jessica Elert, Paul Eliasson, Brittmarie GranlundAbstract:The aim of the present controlled study was to evaluate the effect of a general fitness program, performed by an occupational health service, using pre-post assessment for a number of different outcome measures. A total of 160 employees working in the central home care service district of Umeå, Sweden were asked to participate in a program of a 1-year long exercise program. Of the 160 selected, 54 subjects declined to participate and nine subjects were rejected after a medical check up. The remaining 97 subjects participated in a schedule consisting of pre-post medical and physiotherapy examinations, questionnaires concerning sociodemography, musculoskeletal and general health complaints and work environment, physiological tests of cardiovascular fitness, and of strength and endurance of Shoulder Flexors and knee extensors, and registration of sick leave. The subjects were randomly assigned to an exercise (treatment) or control group. The exercise group trained twice a week for 1 year using a mixed program including exercises for coordination, strength/endurance, and fitness. The test schedule was repeated for both groups after 1 year. The exercise intervention was associated with positive changes in prevalence and intensity of musculoskeletal and psychosomatic complaints, better physiotherapy status (less muscle tightness, better neck mobility, and less tender points), increased Shoulder strength and increased coordination in thigh muscles. However, the exercise group reported worse situations post-exercise concerning aspects of their physical and psychosocial work-environment (i.e., concerning ergonomy, influence, appreciation and communication with work manager), which might have been due to stress associated with the exercise situation .
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fatigue in the Shoulder muscles during static work at two different torque levels
Clinical Physiology, 1993Co-Authors: Björn Gerdle, M Edstrom, M RahmAbstract:Summary. The present study aimed to investigate whether and when a shift in the mean power frequency (MPF) of the electromyogram (EMG) occurs at low torque levels during a maximum endurance test of three Shoulder Flexors. Twelve clinically healthy women performed two endurance tests of the Shoulder Flexors (at 50% MVC-the high torque level, and at approximately 18% MVC - the low torque level) until maximum exhaustion. Surface EMG were obtained and MPF and signal amplitude (RMS) were computed for the trapezius descendens, the anterior part of the deltoid and the infraspinatus. The subjects also rated the perception of fatigue in the Shoulder muscles throughout the two tests using a 10-graded scale. A significantly higher degree of perceived fatigue was found at the low rather than at the high torque level. In contrast significantly lower MPF were found at the end of the endurance times in the three muscles at the high torque level when compared to the low torque level. At the low torque level MPF of the trapezius was constant throughout the test. In the deltoid the most prominent decrease occurred during the initial 30–40% of the endurance time at the low torque level. It is suggested that the MPF shift mainly reflects peripheral fatigue of the type-2 fibres. The results of the present study question the use of the MPF shift to monitor peripheral fatigue in the fibres active (mainly type-1) at low torque levels.,
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Mechanical performance, level of continuous contraction and muscle pain symptoms in home care personnel.
Scandinavian Journal of Rehabilitation Medicine, 1992Co-Authors: Elert J, Christine Brulin, Björn Gerdle, Johansson HAbstract:: The interrelationships between reported complaints, clinical status, mechanical performance and EMG pattern of the Shoulder Flexors and the knee extensors, respectively, during maximum dynamic contractions were investigated. A group of 97 randomly selected women employed in the home care service participated. Those who reported complaints had more clinical findings, such as reduced mobility, tender points and muscle tightness, than non-complainers. The level of muscle activity during the passive part of the contraction cycle was significantly higher in the Shoulder Flexors than in the knee extensors. Subjects without reported complaints who had been employed for more than ten years had a significantly lower activity level in the Shoulder muscles than subjects without complaints who had been employed for a shorter time. We suggest that a high muscle tension level between contractions might precede muscle pain. A cluster analysis including sociodemographic, clinical and physiological variables revealed different subgroups, which points to the need to investigate the work situation in a multivariate way.
Gabriel Y F Ng - One of the best experts on this subject based on the ideXlab platform.
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isokinetic work profile of Shoulder Flexors and extensors in sport climbers and nonclimbers
Journal of Orthopaedic & Sports Physical Therapy, 2008Co-Authors: Emmy K. L. Wong, Gabriel Y F NgAbstract:Study Design Cross-sectional, 2-group comparison, experimental laboratory study. Objectives Examining and comparing the work profiles of the Shoulder Flexors and extensors between sport climbers and nonclimbers. Background Sport climbing places high demands on the Shoulder, which could lead to unique work profiles of the agonist/antagonist muscle groups. Methods and Measures Isokinetic work output of the dominant Shoulder Flexors and extensors of 31 sport climbers and 27 nonclimbers were measured from 0° to 180° of flexion at a test speed of 60°/s. Profiles for work data (concentric flexion [conFlex], eccentric flexion [eccFlex], concentric extension [conExt], eccentric extension [eccExt]) normalized to body mass, conventional work ratios (conFlex/conExt and eccFlex/eccExt), and functional work ratios (eccFlex/conExt and eccExt/ conFlex) were developed for both climbers and nonclimbers. Results All work profiles were different between the 2 groups (P<.001). All normalized work data were higher in climbers...
Justin Y Jeon - One of the best experts on this subject based on the ideXlab platform.
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a pilot randomized controlled trial of 6 week combined exercise program on fasting insulin and fitness levels in individuals with spinal cord injury
European Spine Journal, 2019Co-Authors: Andrew J Taylor, Hyuna Park, Sang Yong Park, Kyongmee Chung, Justin Y JeonAbstract:PURPOSE The aim of this randomized controlled trial study was to investigate the effect of combined exercise program on the fasting insulin and fitness levels of people with spinal cord injury (SCI). METHODS A total of 19 individuals with SCI participated in a combined exercise program consisting of aerobic and resistance exercises for 60 min per day, 3 days per week for 6 weeks. Peak oxygen consumption, body mass index, percent body fat, waist circumference, Shoulder abduction and adduction, Shoulder flexion and extension, elbow flexion and extension, fasting insulin levels, and homeostasis model assessment of insulin resistance (HOMA-IR) levels were measured at baseline and after the intervention. RESULTS The 6-week exercise program significantly decreased the average fasting insulin (baseline: 7.5 ± 4.7 µU/ml vs. post-intervention: 4.5 ± 2.2 µU/ml, p < 0.05) and HOMA-IR (baseline: 1.5 ± 1.0 vs. post-intervention: 0.9 ± 0.4, p < 0.05) in the exercise group, whereas there was no change in control group (between group difference, mean fasting insulin: - 3.2 µU/ml, p = 0.003; mean HOMA-IR: - 0.66, p = 0.001). In addition, muscle strength of the Shoulder Flexors, extensors, abductors, adductors, and elbow Flexors was significantly improved in the exercise group compared to the controls. CONCLUSION A combined exercise program is effective in decreasing fasting insulin and HOMA-IR levels while improving fitness in those with SCI. These slides can be retrieved under Electronic Supplementary Material.
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A six-week motor-driven functional electronic stimulation rowing program improves muscle strength and body composition in people with spinal cord injury: a pilot study
Spinal Cord, 2014Co-Authors: D-i Kim, D-s Park, B S Lee, Justin Y JeonAbstract:Study design: Preclinical and postclinical intervention and outcomes measure design. Objective: To investigate the efficacy of six weeks of motor-driven functional electronic stimulation (FES) rowing exercise intervention on cardiopulmonary fitness, upper body strength and body composition in people with spinal cord injury (SCI). Setting: The National Rehabilitation Center in Korea. Methods: A total of 12 people with SCI (ten males, two females) participated in 42.5-minute training sessions on motor-driven FES rowing machine, 5 days a week for 6 weeks. Peak oxygen consumption, body mass index, percent body fat, waist circumference, Shoulder abduction and adduction, Shoulder flexion and extension and elbow flexion and extension were measured at baseline and after the intervention. Results: The six weeks of training with a motor-driven FES rowing machine significantly decreased percent body fat (Pre: 23.9±8.5 vs Post: 20.4±7.9, P =0.028) and increased lean body mass (Pre: 50.4±9.4 vs Post: 53.3±10.0, P =0.001), muscular strength of the Shoulder Flexors (Pre: 147.5±68.5 vs Post: 180.9±71.8, P =0.002), extensors (Pre: 132.7±51.8 vs Post: 160.6±67.9, P =0.010), abductors (Pre: 126.1±52.6 vs Post: 163.7±77.8, P =0.002) and adductors (Pre: 172.3±69.0 vs Post: 215.2±95.7, P =0.003), as well as elbow Flexors (Pre: 212.7±66.6 vs Post: 256.6±76.1, P =0.004) and extensors (Pre: 190.6±65.0 vs Post: 221.9±63.9, P =0.002). Conclusions: Exercise using a motor-driven FES rowing machine may be used as a new exercise modality to improve body composition and upper body muscle strength in people with SCI. Sponsorship: This research was supported by a grant (code# 08-B-03, #10-B-01) from the National Rehabilitation Research Institute.
Helene Moffet - One of the best experts on this subject based on the ideXlab platform.
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Muscle strength changes as measured by dynamometry following functional rehabilitation in individuals with spinal cord injury
Archives of Physical Medicine and Rehabilitation, 1999Co-Authors: Melanie Drolet, Joëlle Vachon, Luc Noreau, Helene MoffetAbstract:Abstract Objective: To objectively quantify muscle strength changes over the course of functional rehabilitation and up to 15 months postdischarge in individuals with spinal cord injury (SCI). Method: Hand-held dynamometry was used to evaluate the strength of six muscle groups in 31 individuals after acute SCI (tetraplegia, n = 13, paraplegia, n = 18). Assessment was performed by a single research therapist at admittance and discharge from functional rehabilitation and 3 months and 15 months after discharge. Results: There were significant increases of mean strength values for all muscle groups between admittance and discharge in individuals with parapalegia (median value between 13% and 22%) and tetraplegia (median value between 33% and 83%). Three months after discharge, only individuals with tetraplegia continued to significantly improve their mean strength for four muscle groups (elbow Flexors-extensors and Shoulder Flexors-extensors). One year later, elbow Flexors were significantly improved in both paraplegic and tetraplegic persons, while Shoulder extensors showed significant gains only in individuals with paraplegia. Study results showed a large variability in the individual profiles of upper limb strength recovery, particularly in tetraplegic individuals. Although some individuals showed strength gains exceeding 200%, some strength decreases were noted. Conclusion: Recovery of muscle strength in individuals with tetraplegia over individuals with parapalegia continues for a longer period since it depends initially on recovery of muscle innervation. This study quantified strength improvements during rehabilitation and clearly showed that these gains can be maintained or even increased when the person returns to community living.
