Task specificity impacts dual-task interference in older adults

Fallahtafti, Farahnaz; Boron, Julie Blaskewicz; Venema, Dawn M.; Kim, Hyeon Jung; Yentes, Jennifer M.

doi:10.1007/s40520-020-01575-3

Cited by 21 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, participants' MoS variability ranged from 0.4 to 3.1 cm, which is not larger than the variability reported by McCrum et al ( 2020 ), which ranged from ~1 to ~3.5 cm and was measured over 10 consecutive unperturbed steps. This, and recent observations by Fallahtafti et al ( 2021 ) showing that treadmill walking leads to lower MoS variability compared with overground walking, suggest that the within-subjects MoS variability might not have been overestimated but rather underestimated, which may explain the large number of participants who did not return to stable gait by the 15th step in this study ( n = 14 following the first slip). Careful considerations should be made concerning the number of steps used to determine the MoS variability in future studies, particularly when transferring from treadmill to overground tasks.…”

Section: Discussionsupporting

confidence: 64%

Biomechanical Mechanisms of Improved Balance Recovery to Repeated Backward Slips Simulated by Treadmill Belt Accelerations in Young and Older Adults

Debelle

Maganaris

O’Brien

2021

Front. Sports Act. Living

View full text Add to dashboard Cite

Aim: Exposure to repeated gait perturbations improves the balance of older adults (OAs) and decreases their risks of falling, but little is known about the underpinning mechanical adjustments. We aimed to quantify the changing temporo-spatial and kinetic characteristics of balance recovery following repeated backward slips to better understand the mechanical adjustments responsible for improved balance.Methods: We exposed 17 young adults (YAs) (25.2 ± 3.7 years) and 17 OAs (62.4 ± 6.6 years) to 10 backward slips simulated on an instrumented treadmill by unilateral backward belt accelerations. We measured the balance of the participants (margin of stability: MoS), balance recovery (nsteps: number of steps necessary to return to a steady gait for at least three consecutive steps), temporo-spatial (step length), and kinetics [ground reaction force (GRF) angle, lower limb joint moments] for 15 steps following each slip. The results were compared with baseline.Results: Participants in both groups improved their MoS and nsteps with repeated exposure to the slips, but no significant effect of age was detected. During the perturbed step, the GRF vector was directed more posteriorly during mid-stance and more anteriorly during push-off than baseline, which resulted in a longer step. These adjustments were maintained from the first (Slip01) to the last (Slip10) slip, and by Slip10 were correlated with better balance (MoS) on the second recovery step. During the first recovery step following Slip01, participants developed lower plantarflexor and larger knee extensor moments whilst taking a shorter step, these adjustments were correlated with poorer balance and were not maintained with repeated slips. Joint moments and step length of the first recovery step returned to normal levels by Slip10.Conclusion: Young adults and OAs improved their balance with repeated slips. The adjustments that were positively correlated with balance (changes in step length, GRF angle) were maintained whilst those that were not (changes in joint moments) were discarded. All the responses observed in Slip10 were observed in Slip01. The observed balance improvements were achieved by refining the initial strategy rather than by developing a new one. The underlying mechanics were correlated with step length of the first recovery steps, which was associated with balance and should be monitored in fall prevention interventions.

show abstract

Section: Discussionsupporting

confidence: 64%

Biomechanical Mechanisms of Improved Balance Recovery to Repeated Backward Slips Simulated by Treadmill Belt Accelerations in Young and Older Adults

Debelle

Maganaris

O’Brien

2021

Front. Sports Act. Living

View full text Add to dashboard Cite

show abstract

“…Vale destacar que, embora o treinamento de DT seja uma estratégia eficaz para melhorar a capacidade cognitiva e motora da população idosa é fundamental que as tarefas sejam adequadamente planejadas, pois o tipo de tarefa cognitiva concorrente pode influenciar na interferência da DT. 68 Além do mais, é necessário que os participantes apresentem um mínimo de desempenho cognitivo, bem como que a priorização das variáveis seja considerada, e que exista a priorização das atividades de transferência. 69 Outro aspecto a considerar é que o treinamento de DT seja realizado por um tempo superior a quatro semanas.…”

Section: Discussionunclassified

Paradigma de dupla tarefa no contexto de quedas de idosos: uma revisão integrativa

Nascimento

2022

Rev. Cont. Saúde

View full text Add to dashboard Cite

Com o envelhecimento, o desempenho cognitivo, a marcha e o equilíbrio são afetados. Diante disso, idosos apresentam dificuldade para executar simultaneamente duas ou mais tarefas em situações cotidianas da vida. Objetivo: Sumarizar estudos que investigaram a relação entre marcha, equilíbrio e quedas de idosos utilizando o paradigma de dupla tarefa. Metodologia: Revisão integrativa da literatura que incluiu estudos publicados entre os anos os anos de 2008 e 2021, realizada nas bases eletrônicas de dados PubMed, CINAHL e Web of Science com os descritores MeSH: marcha OU caminhada OU equilíbrio OU postura OU idade (60 anos ou mais) OU quedas OU quedas acidentais OU dupla tarefa OU dupla tarefa OU paradigma de dupla tarefa OU tarefa cognitiva. Resultados: 1.280 estudos foram encontrados e 34 selecionados. Verificou-se que o paradigma de dupla tarefa é uma estratégia útilà identificação prévia de idosos caidores, além de que exercícios de dupla tarefa podem beneficiar o desempenho da marcha e do equilíbrio, reduzindo o risco de quedas. Conclusão: Paradigmas de dupla tarefa são medidas eficazes à identificação de distúrbios da marcha e do equilíbrio. No contexto de queda de idosos, o emprego dessa metodologia apresenta vantagens em relação aos exercícios fundamentados na tarefa única. Estudos futuros devem buscar homogeneidade entre as medidas de avaliação e buscar um melhor detalhamento dos exercícios empregados.

show abstract

“…This additive effect increases cognitive demands; a result of task demands and the required coordination processes (Son et al, 2019 ). As such, the ability to manage the interference of, and switching between, conflicting tasks is of high importance during dual-/multi-task performance (Fallahtafti et al, 2020 ). Failure to do so can result in a performance decrement; termed the dual-task interference effect (Schmidt and Lee, 2013 ).…”

Section: Inclusion Of Dual-/multi-taskingmentioning

confidence: 99%

Transferability of Military-Specific Cognitive Research to Military Training and Operations

et al. 2021

View full text Add to dashboard Cite

Task specificity impacts dual-task interference in older adults

Cited by 21 publications

References 38 publications

Biomechanical Mechanisms of Improved Balance Recovery to Repeated Backward Slips Simulated by Treadmill Belt Accelerations in Young and Older Adults

Biomechanical Mechanisms of Improved Balance Recovery to Repeated Backward Slips Simulated by Treadmill Belt Accelerations in Young and Older Adults

Paradigma de dupla tarefa no contexto de quedas de idosos: uma revisão integrativa

Transferability of Military-Specific Cognitive Research to Military Training and Operations

Contact Info

Product

Resources

About