Effects of relaxation and/or biofeedback training upon hip flexion in gymnasts

1981 ◽  
Vol 6 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Vietta E. Wilson ◽  
Evelyn I. Bird
Anaesthesia ◽  
2001 ◽  
Vol 56 (10) ◽  
pp. 1023-1024 ◽  
Author(s):  
F. Plaat ◽  
L. McCready-Hall

1999 ◽  
Vol 4 (1) ◽  
pp. 6-7
Author(s):  
James J. Mangraviti

Abstract The accurate measurement of hip motion is critical when one rates impairments of this joint, makes an initial diagnosis, assesses progression over time, and evaluates treatment outcome. The hip permits all motions typical of a ball-and-socket joint. The hip sacrifices some motion but gains stability and strength. Figures 52 to 54 in AMA Guides to the Evaluation of Permanent Impairment (AMA Guides), Fourth Edition, illustrate techniques for measuring hip flexion, loss of extension, abduction, adduction, and external and internal rotation. Figure 53 in the AMA Guides, Fourth Edition, illustrates neutral, abducted, and adducted positions of the hip and proper alignment of the goniometer arms, and Figure 52 illustrates use of a goniometer to measure flexion of the right hip. In terms of impairment rating, hip extension (at least any beyond neutral) is irrelevant, and the AMA Guides contains no figures describing its measurement. Figure 54, Measuring Internal and External Hip Rotation, demonstrates proper positioning and measurement techniques for rotary movements of this joint. The difference between measured and actual hip rotation probably is minimal and is irrelevant for impairment rating. The normal internal rotation varies from 30° to 40°, and the external rotation ranges from 40° to 60°.


2006 ◽  
Author(s):  
William A. Edmonds ◽  
Derek T. Mann ◽  
Gershon Tenenbaum
Keyword(s):  

Healthcare ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 703
Author(s):  
Xiaoyi Yang ◽  
Yuqi He ◽  
Shirui Shao ◽  
Julien S. Baker ◽  
Bíró István ◽  
...  

The chasse step is one of the most important footwork maneuvers used in table tennis. The purpose of this study was to investigate the lower limb kinematic differences of table tennis athletes of different genders when using the chasse step. The 3D VICON motion analysis system was used to capture related kinematics data. The main finding of this study was that the step times for male athletes (MA) were shorter in the backward phase (BP) and significantly longer in the forward phase (FP) than for female athletes (FA) during the chasse step. Compared with FA, knee external rotation for MA was larger during the BP. MA showed a smaller knee flexion range of motion (ROM) in the BP and larger knee extension ROM in the FP. Moreover, hip flexion and adduction for MA were significantly greater than for FA. In the FP, the internal rotational velocity of the hip joint was significantly greater. MA showed larger hip internal rotation ROM in the FP but smaller hip external rotation ROM in the BP. The differences between genders can help coaches personalize their training programs and improve the performance of both male and female table tennis athletes.


2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 915.1-915
Author(s):  
R. Grekhoff

Background:Objectives:Our aim was to study the effect of biofeedback (BFB) training on the locus of control in patients suffering from rheumatoid arthritis (RA), and to justify the use of this method in the complex treatment of the disease.Methods:40 RA patients hospitalized in the rheumatology department were examined. The average age of patients was 48. 6 years ± 7.73 years (from 30 to 70 years), women accounted for the majority = 26 (86%), the average duration of the disease was 12 years ± 3.44 years. We use J. Rotter’s Locus of Control Scale in E.F.Bazhin adaptation. RA patients were divided into two groups: the main (20 patients) and control (20 patients). Patients of the main group received complex therapy with 12 sessions of BFB training, mainly based on the parameters of the brain’s electrical activity — EEG relaxation using the Reakor™ psychophysiological rehabilitation complex manufactured by Medicom MTD (Taganrog).Results:We revealed externality in RA patients in the general field (3.03 ± 0.3), as well as in the field of relation to the disease (3.86 ± 0.23) and in the field of production relations (3.43 ± 0, 25). After BFB trainings, an increase in internality was observed on the scales of the general sphere (p <0.05) and attitude to the disease (p <0.01) in patients of the main group. In the group of patients receiving conventional treatment, the dynamics of the results was unreliable.Conclusion:It should be noted that the locus of control (or subjective control) is a quality that characterizes a person’s tendency to attribute responsibility for the results of his activity to external forces, or to his own abilities and efforts. Externality is manifested when people prefer to shift responsibility for important events of their life to external circumstances, and external forces (bosses, colleagues, etc.). In the field of attitude to the disease, externality is manifested when patient behaves passively, and believes that he cannot influence the course of the disease in any way, shifting all responsibility for the treatment results to medical staff, which can lead to non-compliance with the treatment regimen and an increase in the level of anxiety and depression, decreased self-esteem. The onset of the disease and its associated social consequences (disability, loss of social roles, etc.) can cause a negative mental state of learned helplessness. Learned helplessness is defined as a condition that occurs as a result of uncontrolled, mainly negative events, which manifests itself in violations of emotional, motivational and cognitive processes. In other words, RA patient suffering from this condition expects treatment failures and reduces control over compliance with the treatment regimen. BFB therapy can be used in order to correct and prevent the state of learned helplessness by increasing the level of internality.It is assumed that increasing internality in the BFB process is associated with teaching the patient the skills of self-regulation of physiological processes. The mechanisms of BFB therapeutic effect are not only changes in physiological parameters (improvement of cerebral and peripheral blood flow, muscle relaxation, and improvement of sleep) but also in a shift in the locus of control from external to internal, which can increase compliance, reduce neurotic complaints, mobilize volitional potential and improve patient self-esteem.As a result of BFB course, an increase in the internality was noted in patients on the scales of the general sphere and the sphere of attitude to the disease. It is advisable to use the BFB to increase the compliance and effectiveness of complex treatment of RA patients.Disclosure of Interests:None declared


Author(s):  
Tiancheng Zhou ◽  
Caihua Xiong ◽  
Juanjuan Zhang ◽  
Di Hu ◽  
Wenbin Chen ◽  
...  

Abstract Background Walking and running are the most common means of locomotion in human daily life. People have made advances in developing separate exoskeletons to reduce the metabolic rate of walking or running. However, the combined requirements of overcoming the fundamental biomechanical differences between the two gaits and minimizing the metabolic penalty of the exoskeleton mass make it challenging to develop an exoskeleton that can reduce the metabolic energy during both gaits. Here we show that the metabolic energy of both walking and running can be reduced by regulating the metabolic energy of hip flexion during the common energy consumption period of the two gaits using an unpowered hip exoskeleton. Methods We analyzed the metabolic rates, muscle activities and spatiotemporal parameters of 9 healthy subjects (mean ± s.t.d; 24.9 ± 3.7 years, 66.9 ± 8.7 kg, 1.76 ± 0.05 m) walking on a treadmill at a speed of 1.5 m s−1 and running at a speed of 2.5 m s−1 with different spring stiffnesses. After obtaining the optimal spring stiffness, we recruited the participants to walk and run with the assistance from a spring with optimal stiffness at different speeds to demonstrate the generality of the proposed approach. Results We found that the common optimal exoskeleton spring stiffness for walking and running was 83 Nm Rad−1, corresponding to 7.2% ± 1.2% (mean ± s.e.m, paired t-test p < 0.01) and 6.8% ± 1.0% (p < 0.01) metabolic reductions compared to walking and running without exoskeleton. The metabolic energy within the tested speed range can be reduced with the assistance except for low-speed walking (1.0 m s−1). Participants showed different changes in muscle activities with the assistance of the proposed exoskeleton. Conclusions This paper first demonstrates that the metabolic cost of walking and running can be reduced using an unpowered hip exoskeleton to regulate the metabolic energy of hip flexion. The design method based on analyzing the common energy consumption characteristics between gaits may inspire future exoskeletons that assist multiple gaits. The results of different changes in muscle activities provide new insight into human response to the same assistive principle for different gaits (walking and running).


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