Postural control in karate practitioners: Does practice make perfect?

Hadad, Amit; Ganz, Natalie; Intrator, Nathan; Maimon, Neta B.; Molcho, Lior; Hausdorff, Jeffrey M.

doi:10.1016/j.gaitpost.2020.01.030

Cited by 16 publications

(16 citation statements)

References 21 publications

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“…The serial subtraction task assesses concentration, selective attention, working memory, and information processing speed, and since it's performed during walking it also demands dual-tasking abilities. Measures of sway and gait were evaluated using previously described methods [50].…”

Section: Assessmentsmentioning

confidence: 99%

Combining transcranial direct current stimulation with a motor-cognitive task: the impact on dual-task walking costs in older adults

Schneider

Dagan

Katz

et al. 2021

J NeuroEngineering Rehabil

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Background The performance of a secondary task while walking increases motor-cognitive interference and exacerbates fall risk in older adults. Previous studies have demonstrated that transcranial direct current stimulation (tDCS) may improve certain types of dual-task performance, and, that tDCS delivered during the performance of a task may augment the benefits of stimulation, potentially reducing motor-cognitive interference. However, it is not yet known if combining multi-target tDCS with the simultaneous performance of a task related to the tDCS targets reduces or increases dual-task walking costs among older adults. The objectives of the present work were (1) To examine whether tDCS applied during the performance of a task that putatively utilizes the brain networks targeted by the neuro-stimulation reduces dual-task costs, and (2) to compare the immediate after-effects of tDCS applied during walking, during seated-rest, and during sham stimulation while walking, on dual-task walking costs in older adults. We also explored the impact on postural sway and other measures of cognitive function. Methods A double-blind, ‘within-subject’ cross-over pilot study evaluated the effects of 20 min of anodal tDCS targeting both the primary motor cortex (M1) and the left dorsolateral prefrontal cortex (lDLPFC) in 25 healthy older adults (73.9 ± 5.2 years). Three stimulation conditions were assessed in three separate sessions: (1) tDCS while walking in a complex environment (tDCS + walking), (2) tDCS while seated (tDCS + seated), and (3) walking in a complex environment with sham tDCS (sham + walking). The complex walking condition utilized virtual reality to tax motor and cognitive abilities. During each session, usual-walking, dual-task walking, quiet standing sway, and cognitive function (e.g., Stroop test) were assessed before and immediately after stimulation. Dual-task costs to gait speed and other measures were computed. Results The dual-task cost to gait speed was reduced after tDCS + walking (p = 0.004) as compared to baseline values. Neither tDCS + seated (p = 0.173) nor sham + walking (p = 0.826) influenced this outcome. Similar results were seen for other gait measures and for Stroop performance. Sway was not affected by tDCS. Conclusions tDCS delivered during the performance of challenging walking decreased the dual-task cost to walking in older adults when they were tested just after stimulation. These results support the existence of a state-dependent impact of neuro-modulation that may set the stage for a more optimal neuro-rehabilitation. Trial registration: Clinical Trials Gov Registrations Number: NCT02954328.

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Section: Assessmentsmentioning

confidence: 99%

Combining transcranial direct current stimulation with a motor-cognitive task: the impact on dual-task walking costs in older adults

Schneider

Dagan

Katz

et al. 2021

J NeuroEngineering Rehabil

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“…Investigation of effective therapeutic dose of martial arts is needed with documentation of movement tracking to advance the knowledge for future applications and real-world implementation. Additionally, the duration of training interventions has varied considerably from 5 weeks to 3 years [4][5][6][7][12][13][14][15][16][17][18][19][20][21][22][23][24]. For clinical application, better documentation of activities undertaken, assessment of minimum timing for e cacious outcome, and extension to more commonly found community martial arts (eg.…”

Section: Introductionmentioning

confidence: 99%

Five Weeks of Yuishinkai Karate Training Improves Balance and Neuromuscular Function in Older Adults

Mustafa

Harrison

Sun

et al. 2021

Preprint

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Background: To test the efficacy of a documented 5-week karate training intervention for rehabilitation and neuroprotection in older adults. Methods: Sixteen older adults (8 male, 8 female, age 59-90y), with or without chronic conditions, participated a 5-week karate training intervention. Dynamic balance, hand grip, ankle plantarflexion force, Timed Up and Go (TUG), and spinal cord excitability (via the soleus H-reflex) were assessed pre- and post-intervention. Results: Participants completed 2437 steps, 1762 turns, 3585 stance changes, 2047 punches, 2757 blocks, and 1253 strikes. Karate training improved dynamic postural performance. The group average time for dynamic postural reaction was reduced (time to target (-13.6%, p = 0.020) and time to center (-8.3%, p =0.010)). TUG was unchanged when considering the entire group (p=0.779), but reductions were found in 5 neurologically intact older adults (-4.5 to -8.6%; p<0.05) and increased for 1 Parkinson’s Disease participant (3.8%, p<0.05). Strength increased in left arm (7.9%, p=0.037), right leg (28.8%, p=0.045), and left leg (13.3%, p=0.024) for the group. Spinal cord excitability remained unchanged across the group but 3 neurologically intact older adults (215.4%, 47.9%, -35.9%; p<0.05) and 2 Parkinson’s Disease participants (152.4%, 195.3%; p<0.05) had modulated H-reflex amplitudes. Conclusion: 5-weeks of karate training delivered in a fashion to mimic community-level programs provided an effective therapeutic “dose” to improve balance and strength in older adults. Whole-body training embodied in martial arts enhanced neuromuscular function and postural integration. Further quantitative work should explore threshold dose and development of martial arts interventions as functional fitness for older adults.

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“…In particular, elite judokas are characterized by a smaller radius of center of foot pressure (COP) and recovered their balance signi cantly faster after kicking (11). Differences in postural stability were also observed in the early years of training, with adolescent martial arts practitioners showing a superior balance ability in comparison to their psychically active peers (12). However, in many cases differences in postural control between athletes of different levels of expertise or between trained and untrained athletes were not observed.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Expertise on Postural Control in Elite ju-jitsu Athletes

Akbaş¹,

Marszałek²,

Drozd³

et al. 2021

Preprint

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Background: The testing of athletes in ecological conditions is based on the concept that sport-specific adaptations in postural control are observed mostly in positions or tasks that are related to the practice of a specific movement. Due to the high postural control demands of ju-jitsu, it is likely that long-term ju-jitsu training may influence the process of maintaining a stable posture, especially in positions directly related to combat. The purpose of this study was to examine the postural sway characteristics of elite ju-jitsu athletes in ecological and non-ecological conditions with an approach not previously used in martial arts.Methods: The study was conducted on eleven male elite ju-jitsu athletes and ten non-athletes. The data was collected with the use of a force plate under two conditions: quiet standing and ju-jitsu combat stance. Apart from the standard analysis of the spatial-temporal parameters of COP, sensitive methods in COP data processing were used, namely rambling-trembling and sample entropy. The non-parametric U Mann-Whitney test was used to compare both positions.Results: The main findings of the study showed that in quiet standing, elite ju-jitsu athletes and non-athletes had comparable postural control in both the anterior-posterior and mediolateral planes. In contrast, elite athletes had lower values of postural sway and higher values of sample entropy in comparison to the non-trainees in the combat stance (p<0.05). The rambling-trembling decomposition of the COP data did not exhibit additional differences between groups beyond the standard analysis.Conclusions: Our results confirmed the importance of a sport-specific environment in investigating the subtle differences in the postural regulation of elite athletes. The sample entropy results indicated more irregular characteristics of postural sway in the elite ju-jitsu athletes, representing more automated postural control.

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Postural control in karate practitioners: Does practice make perfect?

Cited by 16 publications

References 21 publications

Combining transcranial direct current stimulation with a motor-cognitive task: the impact on dual-task walking costs in older adults

Combining transcranial direct current stimulation with a motor-cognitive task: the impact on dual-task walking costs in older adults

Five Weeks of Yuishinkai Karate Training Improves Balance and Neuromuscular Function in Older Adults

The Effect of Expertise on Postural Control in Elite ju-jitsu Athletes

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