Stepping over an obstacle increases the motions and moments of the joints of the trailing limb in young adults

Chou, Li-Shan; Draganich, Louis F.

doi:10.1016/s0021-9290(96)00161-3

Cited by 135 publications

(114 citation statements)

References 16 publications

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“…The present findings support the use of Tai Chi exercise as an effective rehabilitation strategy for older adults who at risk of fall. Finally, recent studies 32,[35][36][37] suggest that the relation between the control of the lateral stability and the M-L displacement of the COP may be a good indicator of dynamic stability in older adults. It would be interesting to investigate the influence of the Tai Chi exercise on lateral stability and its relationship to the COP during obstacle crossing.…”

Section: Discussionmentioning

confidence: 99%

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Kim

2009

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to investigate the changes of the center of pressure (COP) trace in fall-prone older adults during obstacle crossing before and after Tai Chi exercise.[Subjects] Fifty-two fall-prone older adults participated in either a 12-week intervention of Tai Chi exercise or in a health education program.[Methods] The subjects were pre-and post-tested in a task in which they were asked to step over an obstacle from a quiet stance. The subjects were divided into two groups (the experimental group and the control group). Participants in the experimental group received Tai Chi exercise emphasizing dynamic weight shifting three times weekly. Participants in the control group met for one-hour weekly and listened to lectures about health promotion. Performance was assessed by recording the changes in the displacement of the COP in the anteroposterior (A-P) and mediolateral (M-L) directions using a force platform.[Results] The experimental group of subjects significantly increased A-P and M-L displacement of the COP after Tai Chi exercise (p<0.05).[Conclusion] This study shows that participation in Tai Chi exercise increased the magnitude of the A-P and M-L displacement of the COP, thereby improving the ability of older adults to generate momentum to initiate gait.

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Section: Discussionmentioning

confidence: 99%

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Kim

2009

J Phys Ther Sci

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“…Children with ADHD struggled to maintain motor performance while processing the auditory reaction time tasks 24) and this influenced step width. Some studies have also found that people with poor balance skills exhibit a wider base of support to manage body stability during obstacle crossing [16][17][18]25) . In the condition of DT, ADHD participants increased their step width while control subjects decreased their step width.…”

Section: Discussionmentioning

confidence: 99%

“…People have to balance their moving body and adapt a motor program to meet the needs in different environments 15) . Obstacle crossing during walking requires precise control of the trailing foot to support body balance 16,17) . Postural deficits become more apparent during obstacle crossing by either widening the step or increasing the time spent in double limb support 18) .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Dynamic Balance under Dual and Simple Task Conditions in Children with Attention Deficit Hyperactivity Disorder

Chen

Wang

et al. 2012

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to make a comparison of dynamic balance ability between dual and simple task conditions. [Subjects and Methods] Nine children with attention deficit hyperactivity disorder (9.00 ± 2.12 years) and 10 healthy children (9.67 ± 2.75 years) were recruited. Each group was asked to do an obstacle crossing alone and the obstacle crossing combined with a stimulus response task. The Qualisys motion capture system was used to capture full-body motion. The parameters measured included crossing speed, step width, and reaction time.[Results] Children with attention deficit hyperactivity disorder had greater problems than controls in performing the primary balance task while concurrently completing the auditory reaction time task and showed greater variability in step width and a longer reaction time. The balance scores assessed using the Movement Assessment Battery for Children test were significantly worse in the attention deficit hyperactivity disorder group and were significantly correlated to the crossing reaction time and variance of crossing speeds.[Conclusion] The attention deficit hyperactivity disorder group preferred to complete the obstacle crossings before responding to the stimulus. This resulted in a longer reaction time for the secondary task and also changed the gait strategy.

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“…3) (McFadyen and Winter, 1991;Chou and Draganich, 1997;McFadyen and Carnahan, 1997). Note that kick force was limited in our experiments (see Materials and Methods).…”

Section: Kinetics Patternsmentioning

confidence: 99%

Coordination of Locomotion with Voluntary Movements in Humans

et al. 2005

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Muscle activity occurring during human locomotion can be accounted for by five basic temporal activation patterns in a variety of locomotion conditions. Here, we examined how these activation patterns interact with muscle activity required for a voluntary movement. Subjects produced a voluntary movement during locomotion, and we examined the resulting kinematics, kinetics, and EMG activity in 16 -31 ipsilateral limb and trunk muscles during the tasks. There were four voluntary tasks added to overground walking (ϳ5 km/h) in which subjects kicked a ball, stepped over an obstacle, or reached down and grasped an object on the floor (weight support on either the right or the left foot). Statistical analyses of EMG waveforms showed that the five basic locomotion patterns were invariantly present in each task, although they could be differently weighted across muscles, suggesting a characteristic locomotion timing of muscle activations. We also observed a separate activation that was timed to the voluntary task. The coordination of locomotion with the voluntary task was accomplished by combining activation timings that were associated separately with the voluntary task and locomotion. Activation associated with the voluntary tasks was either synchronous with the timing for locomotion or had additional activations not represented in the basic locomotion timing. We propose that this superposition of an invariant locomotion timing pattern with a voluntary activation timing may be consistent with the proposal suggesting that compound movements are produced through a superposition of motor programs.

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Stepping over an obstacle increases the motions and moments of the joints of the trailing limb in young adults

Cited by 135 publications

References 16 publications

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Comparison of Dynamic Balance under Dual and Simple Task Conditions in Children with Attention Deficit Hyperactivity Disorder

Coordination of Locomotion with Voluntary Movements in Humans

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