Mental Fatigue Increases Gait Variability During Dual-task Walking in Old Adults

Behrens, Martin; Mau-Moeller, Anett; Lischke, Alexander; Katlun, Felix; Gube, Martin; Zschorlich, Volker; Skripitz, Ralf; Weippert, Matthias

doi:10.1093/gerona/glx210

Cited by 60 publications

(60 citation statements)

References 23 publications

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“…It has been shown that state fatigue induced by sustained cognitive activity can be detrimental to subsequent endurance performance (Marcora et al, 2009). Therefore, state fatigue was quantified before each testing session using the fatigue scale of the Profile of Mood States (POMS-F) (Behrens et al, 2018). The POMS-F has been shown to provide a reliable and valid instrument to assess the level of state fatigue across a wide range of cohorts (O'Connor, 2004).…”

Section: State Fatiguementioning

confidence: 99%

Ischemic Preconditioning Did Not Affect Central and Peripheral Factors of Performance Fatigability After Submaximal Isometric Exercise

Behrens

Zschorlich

Mittlmeier³

et al. 2020

Front. Physiol.

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Behrens et al. Ischemic Preconditioning and Submaximal Exercise determinants, nor muscle activity, SmO 2 , and perceptual responses during submaximal isometric exercise. However, IPC seemed to have an ergogenic effect in a few subjects, which might have resulted from a lower effort perception during exercise. These findings support the assumption that there are 'responders' and 'non-responders' to IPC.

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Section: State Fatiguementioning

confidence: 99%

Ischemic Preconditioning Did Not Affect Central and Peripheral Factors of Performance Fatigability After Submaximal Isometric Exercise

Behrens

Zschorlich

Mittlmeier³

et al. 2020

Front. Physiol.

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“…Thus, some studies have also shown that motor performance is decreased when mental fatigue is induced [ 8 , 13 , 14 , 15 , 16 ]. For example, Behrens et al (2018) observed increased gait variability, assessed by the coefficient of variation of speed, stride length, and stance time after mental fatigue in older adults [ 17 ]. As increased gait variability has been described as a fall-risk predictor, the authors concluded that mental fatigue could be an intrinsic risk factor for accidental falls [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Behrens et al (2018) observed increased gait variability, assessed by the coefficient of variation of speed, stride length, and stance time after mental fatigue in older adults [ 17 ]. As increased gait variability has been described as a fall-risk predictor, the authors concluded that mental fatigue could be an intrinsic risk factor for accidental falls [ 17 ]. Additionally, it has been reported that mental fatigue led to an increased likelihood of slip initiation, poorer slip detection, and a more inefficient reactive recovery response to laboratory-induced slip-like perturbations in young adults [ 18 ], further suggesting that mental fatigue could be a risk factor for falls.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations

2020

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The aim of this study was to examine the effect of mental fatigue on postural sway under different sensory conditions in healthy older adults and in persons with chronic stroke (PwCS). Thirty healthy older adults (> 60 years old), randomly separated into experimental and control groups, as well as 15 PwCS participated in this study. Experimental groups were asked to stand on a force platform wearing seven inertial sensors while performing the Sensory Organization Test (SOT) under two cognitive conditions (single- and dual-task) before and after a mental fatigue task (stop-signal task for 60 min). The control group performed the same protocol before and after watching a movie for 60 min. Changes in subjective fatigue was assessed by the NASA Task Load Index and psychophysiological workload was assessed by heart rate variability (HRV). Postural sway was assessed by calculating the Jerk and root mean square (RMS) of center of mass (COM). Higher Jerk and RMS of COM (p < 0.05) were observed after the mental fatigue task in both healthy older adults and PwCS during SOT, which was not observed in the control group (p > 0.05). Additionally, postural sway increased in the three groups as the SOT conditions became more challenging. Our results indicate that mental fatigue, induced by sustained cognitive activity, can impair balance during SOT in older adult and stroke populations.

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“…Nonetheless, participants’ responses to the usability part of the questionnaire indicated an overall confidence that our setup is effective in investigating manifestations of disorientation among cognitively healthy older adults and people with dementia. Furthermore, the first patient with dementia sampled experienced fatigue while navigating the route (akin to the finding of Behrens et al [ 27 ]), which suggests that dual-task conditions can be mentally exhausting among older participants. Therefore, this effect could be exacerbated by the increased difficulty of multitasking as a result of cognitive deficits [ 45 ].…”

Section: Discussionmentioning

confidence: 68%

“…Gait kinematics and kinetics, as well as spatio-temporal gait parameters, can be derived from the motion capturing data [ 23 ]. The system has been used, for example, for rehabilitation exercise [ 24 ] or for gait analysis in different settings [ 25 - 27 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Spatial Disorientation in a Virtual Environment on Gait and Vital Features in Patients with Dementia: Pilot Single-Blind Randomized Control Trial

et al. 2020

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Background Orientation deficits are among the most devastating consequences of early dementia. Digital navigation devices could overcome these deficits if adaptable to the user’s needs (ie, provide situation-aware, proactive navigation assistance). To fulfill this task, systems need to automatically detect spatial disorientation from sensors in real time. Ideally, this would require field studies consisting of real-world navigation. However, such field studies can be challenging and are not guaranteed to cover sufficient instances of disorientation due to the large variability of real-world settings and a lack of control over the environment. Objective Extending a foregoing field study, we aim to evaluate the feasibility of using a sophisticated virtual reality (VR) setup, which allows a more controlled observation of disorientation states and accompanying behavioral and physiological parameters in cognitively healthy older people and people with dementia. Methods In this feasibility study, we described the experimental design and pilot outcomes of an ongoing study aimed at investigating the effect of disorientation on gait and selected physiological features in a virtual laboratory. We transferred a real-world navigation task to a treadmill-based virtual system for gait analysis. Disorientation was induced by deliberately manipulating landmarks in the VR projection. Associated responses in motion behavior and physiological parameters were recorded by sensors. Primary outcomes were variations in motion and physiological parameters, frequency of disorientation, and questionnaire-derived usability estimates (immersion and perceived control of the gait system) for our population of interest. At this time, the included participants were 9 cognitively healthy older participants [5/9 women, 4/9 men; mean age 70 years, SD 4.40; Mini–Mental State Examination (MMSE) mean 29, SD 0.70) and 4 participants with dementia (2/4 women, 2/4 men; mean age 78 years, SD 2.30 years; MMSE mean 20.50, SD 7.54). Recruitment is ongoing, with the aim of including 30 cognitively healthy older participants and 20 participants with dementia. Results All 13 participants completed the experiment. Patients’ route was adapted by shortening it relative to the original route. Average instances of disorientation were 21.40, 36.50, and 37.50 for the cognitively healthy older control, cognitively healthy older experimental participants, and participants with dementia, respectively. Questionnaire outcomes indicated that participants experienced adequate usability and immersion; 4.30 for presence, 3.73 for involvement, and 3.85 for realism of 7 possible points, indicating a good overall ability to cope with the experiment. Variations were also observed in motion and physiological parameters during instances of disorientation. Conclusions This study presents the first feasibility outcomes of a study investigating the viability of using a sophisticated VR setup, based on an earlier real-world navigation study, to study spatial disorientation among cognitively healthy older people and people with dementia. Preliminary outcomes give confidence to the notion that our setup can be used to assess motion and physiological markers of disorientation, even in people with cognitive decline. Trial Registration ClinicalTrials.gov; https://clinicaltrials.gov/ct2/show/NCT04134806

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Mental Fatigue Increases Gait Variability During Dual-task Walking in Old Adults

Cited by 60 publications

References 23 publications

Ischemic Preconditioning Did Not Affect Central and Peripheral Factors of Performance Fatigability After Submaximal Isometric Exercise

Ischemic Preconditioning Did Not Affect Central and Peripheral Factors of Performance Fatigability After Submaximal Isometric Exercise

Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations

Effect of Spatial Disorientation in a Virtual Environment on Gait and Vital Features in Patients with Dementia: Pilot Single-Blind Randomized Control Trial

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