ANALYSIS OF THE EFFECTS OF SPINE STABILIZATION EXERCISES USING A WHOLE BODY TILT DEVICE ON MUSCLE FORCES IN THE SPINE

2014 ◽  
Vol 14 (06) ◽  
pp. 1440003
Author(s):  
KAP-SOO HAN ◽  
CHANG HO YU ◽  
MYOUNG-HWAN KO ◽  
TAE KYU KWON
Keyword(s):  
Inverse Dynamics ◽  
The Elderly ◽  
Body Tilt ◽  
Whole Body ◽  
Muscle Forces ◽  
Activation Patterns ◽  
Muscle Strengthening ◽  
Spine Stabilization ◽  
Inverse Dynamics Analysis ◽  
The Right

The objective of the study was to investigate the effects of 3D stabilization exercises using a whole body tilt device on forces in the trunk, such as individual muscle forces and activation patterns, maximum muscle activities and spine loads. For this sake, a musculoskeletal (MS) model of the whole body was developed, and an inverse dynamics analysis was performed to predict the forces on the spine. An EMG measurement experiment was conducted to validate the muscle forces and activation patterns. The MS model was rotated and tilted in eight different directions: anterior (A), posterior (P), anterior right (AR), posterior right (PR), anterior left (AL), posterior left (PL), right (R) and left (L), replicating the directions of the 3D spine balance exercise device, as performed in the experiment. The anterior directions of the tilt primarily induced the activation of long and superficial back muscles and the posterior directions activated the front muscles. However, deep muscles, such as short muscles and multifidi, were activated in all directions of the tilt. The resultant joint forces in the right and left directions of the tilt were the least among the directions, but higher muscle activations and more diverse muscle recruitments than other positions were observed. Therefore, these directions of tilt may be suitable for the elderly and rehabilitation patients who require muscle strengthening with less spinal loads. In the present investigation, it was shown that 3D stabilization exercises could provide considerable muscle exercise effects with a minimum perturbation of structure. The results of this study can be used to provide safety guidelines for muscle exercises using this type of tilting device. Therefore, the proposed direction of tilt can be used to strengthen targeted muscles, depending on the patients' muscular condition.

scholarly journals ANALYSIS OF MUSCLE STRENGTH EFFECTS ON EXERCISE PERFORMANCE USING DYNAMIC STABILIZATION EXERCISE DEVICE

2020 ◽  
Vol 20 (09) ◽  
pp. 2040004
Author(s):  
KAP-SOO HAN ◽  
SEUNG-ROK KANG ◽  
TAE-KYU KWON
Keyword(s):  
Muscle Strength ◽  
Muscle Activation ◽  
Muscle Force ◽  
Inverse Dynamics ◽  
Body Tilt ◽  
Whole Body ◽  
Stabilization Exercise ◽  
Spine Stabilization ◽  
Exercise Effect ◽  
Inverse Dynamics Analysis

Muscle strength may vary depending on the pathological issues and static life habits. These conditions lead to abnormal spinal loads and change muscle strength as well as activation patterns, thereby causing spinal disorders. In this study, the effects of muscle strength on the spine stabilization exercise were analyzed using a whole-body tilt device. Musculoskeletal modeling was performed and the results were validated through a comparison with the electromyography (EMG) analysis results. Based on the validated basic model, modeling was performed for the whole-body tilt device. To examine the exercise effect and muscle activation while the maximum muscle force capacity (MFC) was varied from 30[Formula: see text]N/cm2 to 60[Formula: see text]N/cm2 and 90[Formula: see text]N/cm2, the muscle force was predicted through inverse dynamics analysis. When MFC was 30[Formula: see text]N/cm2, the posterior direction of the tilt could not be analyzed (no solution found). When MFC was 60[Formula: see text]N/cm2, it could be analyzed, but the muscle force was predicted to be higher compared to when MFC was 90[Formula: see text]N/cm2. It was confirmed that muscle strength is a very important element for maintaining postural activities and performing exercise. Therefore, for rehabilitation patients and elderly people with weak muscle strength, hard or extreme exercise may cause musculoskeletal injuries.

Elastic ankle exoskeletons reduce soleus muscle force but not work in human hopping

2013 ◽  
Vol 115 (5) ◽  
pp. 579-585 ◽  
Author(s):  
Dominic James Farris ◽  
Benjamin D. Robertson ◽  
Gregory S. Sawicki
Keyword(s):  
Inverse Dynamics ◽  
Average Rate ◽  
Plantar Flexion ◽  
Metabolic Cost ◽  
Whole Body ◽  
Negative Consequences ◽  
Metabolic Power ◽  
Force Peak ◽  
Inverse Dynamics Analysis

Inspired by elastic energy storage and return in tendons of human leg muscle-tendon units (MTU), exoskeletons often place a spring in parallel with an MTU to assist the MTU. However, this might perturb the normally efficient MTU mechanics and actually increase active muscle mechanical work. This study tested the effects of elastic parallel assistance on MTU mechanics. Participants hopped with and without spring-loaded ankle exoskeletons that assisted plantar flexion. An inverse dynamics analysis, combined with in vivo ultrasound imaging of soleus fascicles and surface electromyography, was used to determine muscle-tendon mechanics and activations. Whole body net metabolic power was obtained from indirect calorimetry. When hopping with spring-loaded exoskeletons, soleus activation was reduced (30–70%) and so was the magnitude of soleus force (peak force reduced by 30%) and the average rate of soleus force generation (by 50%). Although forces were lower, average positive fascicle power remained unchanged, owing to increased fascicle excursion (+4–5 mm). Net metabolic power was reduced with exoskeleton assistance (19%). These findings highlighted that parallel assistance to a muscle with appreciable series elasticity may have some negative consequences, and that the metabolic cost associated with generating force may be more pronounced than the cost of doing work for these muscles.

Gait Analysis Using Multibody Simulation Tools and Inverse Dynamics Procedures

2005 ◽  
Author(s):  
Miguel Silva ◽  
Jorge Ambro´sio
Keyword(s):  
Gait Analysis ◽  
Inverse Dynamics ◽  
Three Dimensional ◽  
Biomechanical Model ◽  
Whole Body ◽  
Dynamics Analysis ◽  
Natural Coordinates ◽  
Kinematic Constraints ◽  
Biomechanical Models ◽  
Inverse Dynamics Analysis

The use of inverse dynamics methodologies for the evaluation of intersegmental reaction forces and the moments-of-force at the anatomical joints, in the framework of gait analysis, not only requires that appropriate biomechanical models are used but also that kinematic and kinetic data sets are available. This paper discusses the quality of the results of the inverse dynamics analysis with respect to the filtering procedures used and the kinematic consistency of the position, velocity and acceleration data. A three-dimensional whole body response biomechanical model based on a multibody formulation with natural coordinates is used. The model has 16 anatomical segments that are described using 33 rigid bodies in a total of 44 degrees-of-freedom. In biomechanical applications, one of the advantages of the current formulation is that the set of anatomical points used to reconstruct the spatial motion of the subject is also used to construct the set of natural coordinates that describe the biomechanical model itself. Based on the images collected by four synchronized video cameras, the three-dimensional trajectories of the anatomical points are reconstructed using standard photogrammetry techniques and Direct Linear Transformations. The trajectories obtained are then filtered in order to reduce the noise levels introduced during the reconstruction procedure using 2nd order Butterworth low-pass filters with properly chosen cut-off frequencies. The filtered data is used in the inverse dynamics analysis either directly or after being modified in order to ensure its consistency with the biomechanical model’s kinematic constraints. It is also shown that the use of velocities and accelerations consistent with the kinematic constraints or those obtained through the time derivatives of the spline interpolation curves of the reconstructed trajectories lead to similar results.

Gender specific activation patterns of trunk muscles during whole body tilt

2007 ◽  
Vol 101 (2) ◽  
pp. 195-205 ◽  
Author(s):  
Christoph Anders ◽  
Gunther Brose ◽  
Gunther O. Hofmann ◽  
Hans-Christoph Scholle
Keyword(s):  
Trunk Muscles ◽  
Body Tilt ◽  
Whole Body ◽  
Activation Patterns ◽  
Gender Specific

scholarly journals Neuroanatomical correlates of the perception of body axis orientation during body tilt: a voxel-based morphometry study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Keisuke Tani ◽  
Satoshi Tanaka
Keyword(s):  
Individual Differences ◽  
Longitudinal Axis ◽  
The Body ◽  
Body Axis ◽  
Body Tilt ◽  
Whole Body ◽  
Voxel Based Morphometry ◽  
Neural Basis ◽  
Axis Orientation ◽  
The Right

AbstractAccurate perception of the orientations of the body axis and gravity is essential for actions. The ability to perceive these orientations during head and body tilt varies across individuals, and its underlying neural basis is unknown. To address this, we investigated the association between inter-individual differences in local gray matter (GM) volume and inter-individual differences in the ability to estimate the directions of body longitudinal axis or gravity during whole-body tilt using voxel-based morphometry (VBM) analysis in 50 healthy adults (20–46 years, 25 men and 25 women). Although no anatomical regions were identified relating to performance requiring estimates of gravitational direction, we found a significant correlation between the GM volume in the right middle occipital gyrus and the ability to estimate the body axis orientation. This finding provides the first evidence on neuroanatomical substrates of the perception of body axis orientation during body tilt.

scholarly journals Effect of whole-body vibration exercise and muscle strengthening, balance, and walking exercises on walking ability in the elderly

2007 ◽  
Vol 56 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Kazuhiro Kawanabe ◽  
Akira Kawashima ◽  
Issei Sashimoto ◽  
Tsuyoshi Takeda ◽  
Yoshihiro Sato ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
The Elderly ◽  
Whole Body ◽  
Walking Ability ◽  
Body Vibration ◽  
Muscle Strengthening ◽  
Vibration Exercise

scholarly journals No Impact of Stochastic Galvanic Vestibular Stimulation on Arterial Pressure and Heart Rate Variability in the Elderly Population

2021 ◽  
Vol 15 ◽  
Author(s):  
Akiyoshi Matsugi ◽  
Koji Nagino ◽  
Tomoyuki Shiozaki ◽  
Yohei Okada ◽  
Nobuhiko Mori ◽  
...  
Keyword(s):  
Heart Rate ◽  
Arterial Pressure ◽  
Elderly Population ◽  
Nervous Activity ◽  
The Elderly ◽  
Vestibular Stimulation ◽  
Galvanic Vestibular Stimulation ◽  
Body Tilt ◽  
Whole Body ◽  
Healthy Elderly

ObjectiveNoisy galvanic vestibular stimulation (nGVS) is often used to improve postural stability in disorders, such as neurorehabilitation montage. For the safe use of nGVS, we investigated whether arterial pressure (AP) and heart rate vary during static supine and slow whole-body tilt with random nGVS (0.4 mA, 0.1–640 Hz, gaussian distribution) in a healthy elderly population.MethodsThis study was conducted with a double-blind, sham-controlled, cross-over design. Seventeen healthy older adults were recruited. They were asked to maintain a static supine position on a bed for 10 min, and the bed was tilted up (TU) to 70 degrees within 30 s. After maintaining this position for 3 min, the bed was passively tilted down (TD) within 30 s. Real-nGVS or sham-nGVS was applied from 4 to 15 min. The time course of mean arterial pressure (MAP) and RR interval variability (RRIV) were analyzed to estimate the autonomic nervous activity.ResultnGVS and/or time, including pre-/post-event (nGVS-start, TU, and TD), had no impact on MAP and RRIV-related parameters. Further, there was no evidence supporting the argument that nGVS induces pain, vertigo/dizziness, and uncomfortable feeling.ConclusionnGVS may not affect the AP and RRIV during static position and whole-body tilting or cause pain, vertigo/dizziness, and discomfort in the elderly.

Nachhaltigkeit in Wald und Gesellschaft trotz «Überalterung» und «Unterjüngung» (Essay)

2013 ◽  
Vol 164 (8) ◽  
pp. 236-239
Author(s):  
Werner Schärer
Keyword(s):  
Civil Society ◽  
Technical Progress ◽  
The Elderly ◽  
Human Populations ◽  
Civil Society Organisations ◽  
Care For The Elderly ◽  
Economic Reasoning ◽  
The Right ◽  
Implementation Programme ◽  
Effective Distribution

Sustainability in forest and society despite “overmaturity” and “lack of regeneration” (essay) This essay compares efforts to move towards sustainability in the forests with those in the care for the elderly in Switzerland, and tries to draw conclusions which may promote sustainability. It is wrong, for forests and human populations, to talk of “overmaturity”, as this assumes the primacy of economic reasoning. To guarantee sustainability, the balance between all aspects is crucial. To attain true sustainability, we need binding guidelines and the “right” scale of implementation programme. Civil society organisations have been working for decades – often longer than the state itself – to improve sustainability. In many different areas, good cooperation and effective distribution of tasks between these institutions can be observed. This is important, among other things, because the ever greater speed of technical progress may overwhelm the adaptive capacity of both forests and people, which would influence sustainability in a negative way.

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