Three-dimensional Angle Difference of the Lower Extremity Joint to Age during the Elderly Walking

Running during sports and for physical activity often requires changes in velocity through acceleration and deceleration. While it is clear that lower extremity biomechanics vary during these accelerations and decelerations, the work requirements of the individual joints are not well understood. The purpose of this investigation was to measure the sagittal plane mechanical work of the individual lower extremity joints during acceleration, deceleration, and steady-state running. Ten runners were compared during acceleration, deceleration, and steady-state running using three-dimensional kinematics and kinetics measures. Total positive and negative joint work, and relative joint contributions to total work were compared between conditions. Total positive work progressively increased from deceleration to acceleration. This was due to greater ankle joint work during acceleration. While there was no significant change in total negative work during deceleration, there was a greater relative contribution of the knee to total negative work with a subsequent lower relative ankle negative work. Each lower extremity joint exhibits distinct functional roles in acceleration compared with deceleration during level running. Deceleration is dominated by greater contributions of the knee to negative work while acceleration is associated with a greater ankle contribution to positive work.

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Development of a Reminiscence Therapy System for the Elderly Using the Integration of Virtual Reality and Augmented Reality

Sustainability ◽

10.3390/su11174792 ◽

2019 ◽

Vol 11 (17) ◽

pp. 4792 ◽

Cited By ~ 3

Author(s):

Tsao ◽

Shu ◽

Lan

Keyword(s):

Virtual Reality ◽

Augmented Reality ◽

Elderly People ◽

Three Dimensional ◽

Intermediate Stage ◽

The Elderly ◽

Integrated System ◽

Three Dimensional Model ◽

Reminiscence Therapy ◽

The Social

Through virtual interaction and multivariate communication, the social interaction and life satisfaction of elderly people can be improved. This study integrated virtual reality (VR) and augmented reality (AR) to construct a visualized reminiscence therapy system, which provides not only reminiscence entertainment but may also aid in dementia prevention for healthy and sub-healthy (a therapeutic working concept which defines an intermediate stage between health and disease) elderly people. Images taken by an LG 360 CAM are primarily introduced into Power Director 360 as the guide interface. The special effects are joined using After Effects. With the model constructed under 3ds Max, the reminiscence therapy system integrated by virtual reality and augmented reality is then established by the Unity engine. It is shown that the developed 3D ancient building model can be used by Samsung Note 5 smartphones as well as VR CASE glasses to increase the immersive experience for the elderly. Through nostalgic elements triggered by the AR/VR three-dimensional model and video/audio interaction, the feasibility of our integrated system for reminiscence therapy is thus verified. Through reminiscence therapy, memories and thoughts can fully be activated as a therapy for elderly people. The visualized reality system developed in this study can further promote the social interactional satisfaction of elderly people.

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Designing a Somatosensory Interactive Game of Lower Extremity Muscle Rehabilitation for the Elderly

Lecture Notes in Computer Science - Human Aspects of IT for the Aged Population. Supporting Everyday Life Activities ◽

10.1007/978-3-030-78111-8_2 ◽

2021 ◽

pp. 23-37

Author(s):

Chien-Hsiang Chang ◽

Kao-Hua Liu ◽

Hiroyuki Kajihara ◽

Wei-Chih Lien ◽

Peng-Ting Chen ◽

...

Keyword(s):

Lower Extremity ◽

The Elderly ◽

Interactive Game ◽

Lower Extremity Muscle

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Late Rearfoot Eversion and Lower-limb Internal Rotation Caused by Changes in the Interaction between Forefoot and Support Surface

Journal of the American Podiatric Medical Association ◽

10.7547/0990503 ◽

2009 ◽

Vol 99 (6) ◽

pp. 503-511 ◽

Cited By ~ 17

Author(s):

Thales R. Souza ◽

Rafael Z. Pinto ◽

Renato G. Trede ◽

Renata N. Kirkwood ◽

Antônio E. Pertence ◽

...

Keyword(s):

Lower Extremity ◽

Internal Rotation ◽

Lower Limb ◽

Repeated Measures ◽

Three Dimensional ◽

Support Surface ◽

Kinetic Chain ◽

Mechanical Factors ◽

Lateral Wedges ◽

Rearfoot Eversion

Background: The influence of distal mechanical factors that change the interaction between the forefoot and the support surface on lower-limb kinematics is not well established. This study investigated the effects of the use of lateral wedges under the forefoot on the kinematics of the lower extremity during the stance phase of walking. Methods: Sixteen healthy young adults participated in this repeated-measures study. They walked wearing flat sandals and laterally wedged sandals, which were medially inclined only in the forefoot. One wedged sandal had a forefoot lateral wedge of 5° and the other wedged sandal had a forefoot lateral wedge of 10°. Kinematic variables of the lower extremity, theoretically considered clinically relevant for injury development, were measured with a three-dimensional motion analysis system. The variables were evaluated for three subphases of stance: loading response, midstance, and late stance. Results: The 5° laterally wedged sandal increased rearfoot eversion during midstance and the 10° laterally wedged sandal increased rearfoot eversion during mid- and late stances, in comparison to the use of flat sandals. The 10° laterally wedged sandal produced greater internal rotation of the shank relative to the pelvis and of the hip joint, during the midstance, also compared to the use of flat sandals. Conclusions: Lateral wedges under the forefoot increase rearfoot eversion during mid-and late stances and may cause proximal kinematic changes throughout the lower-extremity kinetic chain. Distal mechanical factors should be clinically addressed when a patient presents late excessive rearfoot eversion during walking. (J Am Podiatr Med Assoc 99(6): 503–511, 2009)

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