Biomechanics and muscular activity during sit-to-stand transfer.
Summary of "Biomechanics and muscular activity during sit-to-stand transfer."
In the present study 10 healthy subjects were measured, performing sit-to-stand transfers in a natural way. Starting position and speed of movement were standardized. Sagittal kinematics, the ground reaction force, and muscle activity of nine leg muscles were recorded. During sit-to-stand transfer the mass centre of the body was moved forward and upward. Based on the velocity of the mass centre of the body three phases were distinguished. In horizontal direction forward rotation of the upper body contributed to the velocity of the mass centre of the body, whereas extension of the legs contributed considerably in vertical direction. After seat-off most muscles were concentrically active, whereas the shortening velocity of the rectus femoris was very low. Thus hip and knee joints were extended and a relatively high knee moment was delivered to control the ground reaction force in a slightly backward direction. Co-contraction of hamstrings and rectus femoris in sit-to-stand transfer was judged to be efficient.
Department of Rehabilitation Medicine, Free University Hospital Amsterdam, The Netherlands.
This article was published in the following journal.
Name: Clinical biomechanics (Bristol, Avon)
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/23916233
- DOI: http://dx.doi.org/10.1016/0268-0033(94)90004-3
Subjects with neurological disease (ND) usually show impaired performance during sit-to-stand and stand-to-sit tasks, with a consequent reduction in their mobility levels.
The Previous Day Physical Activity Recall (PDPAR) self-report questionnaire asks children to categories their time in 30 min blocks under activity codes and activity intensity (ActInt). Text and vis...
During gameplay, athletes frequently change their trunk and hand placement positions (e.g. ball handling). Changing trunk positions alters lower extremity (LE) biomechanics and subsequent injury risk ...
Orienteering athletes must adapt to running on various surfaces, with biomechanics likely contributing to performance. Here, our aims were to identify the impact of athletic status and of surface on t...
Muscular dystrophies are a heterogeneous group of genetically inherited disorders whose most prominent clinical feature is progressive degeneration of skeletal muscle. In several forms of the disease,...
The purpose of this study is to see if providing training using a Sit-to-Stand protocol for residents of Long-Term Care Facilities who have had a stroke will increase their independence in...
Purpose: The purpose of this study is to implement and evaluate a randomized controlled trial in sitting office workers to reduce sitting time through the use of motorized and non-motoriz...
The purpose of this study is to determine if ACE-031 is safe and well-tolerated in children with Duchenne Muscular Dystrophy (DMD) and to select the optimal doses of ACE-031 in terms of sa...
This is a laboratory-based study to evaluate the risk of shoulder injury associated with transfers between wheelchair and vehicle in persons with spinal cord injury. Four new devices will ...
This is a registry of individuals affected by Spinal Muscular Atrophy (SMA). The purpose of the registry is to allow researchers studying the biological basis of SMA and potential therapi...
Medical and Biotech [MESH] Definitions
The mechanical laws and the action of forces in living structures.
The transfer of energy of a given form among different scales of motion. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed). It includes the transfer of kinetic energy and the transfer of chemical energy. The transfer of chemical energy from one molecule to another depends on proximity of molecules so it is often used as in techniques to measure distance such as the use of FORSTER RESONANCE ENERGY TRANSFER.
A group of disorders marked by progressive degeneration of motor neurons in the spinal cord resulting in weakness and muscular atrophy, usually without evidence of injury to the corticospinal tracts. Diseases in this category include Werdnig-Hoffmann disease and later onset SPINAL MUSCULAR ATROPHIES OF CHILDHOOD, most of which are hereditary. (Adams et al., Principles of Neurology, 6th ed, p1089)
A heterogenous group of inherited muscular dystrophy without the involvement of nervous system. The disease is characterized by MUSCULAR ATROPHY; MUSCLE WEAKNESS; CONTRACTURE of the elbows; ACHILLES TENDON; and posterior cervical muscles; with or without cardiac features. There are several INHERITANCE PATTERNS including X-linked (X CHROMOSOME), autosomal dominant, and autosomal recessive gene mutations.
Developmental abnormalities in any portion of the VENTRICULAR SEPTUM resulting in abnormal communications between the two lower chambers of the heart. Classification of ventricular septal defects is based on location of the communication, such as perimembranous, inlet, outlet (infundibular), central muscular, marginal muscular, or apical muscular defect.