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Winter L, Bellenger C, Grimshaw P, Crowther RG. Analysis of Movement Variability in Cycling: An Exploratory Study. SENSORS (BASEL, SWITZERLAND) 2023; 23:4972. [PMID: 37430887 DOI: 10.3390/s23104972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 07/12/2023]
Abstract
The purpose of this study was to determine the test-retest repeatability of Blue Trident inertial measurement units (IMUs) and VICON Nexus kinematic modelling in analysing the Lyapunov Exponent (LyE) during a maximal effort 4000 m cycling bout in different body segments/joints. An additional aim was to determine if changes in the LyE existed across a trial. Twelve novice cyclists completed four sessions of cycling; one was a familiarisation session to determine a bike fit and become better accustomed to the time trial position and pacing of a 4000 m effort. IMUs were attached to the head, thorax, pelvis and left and right shanks to analyse segment accelerations, respectively, and reflective markers were attached to the participant to analyse neck, thorax, pelvis, hip, knee and ankle segment/joint angular kinematics, respectively. Both the IMU and VICON Nexus test-retest repeatability ranged from poor to excellent at the different sites. In each session, the head and thorax IMU acceleration LyE increased across the bout, whilst pelvic and shank acceleration remained consistent. Differences across sessions were evident in VICON Nexus segment/joint angular kinematics, but no consistent trend existed. The improved reliability and the ability to identify a consistent trend in performance, combined with their improved portability and reduced cost, advocate for the use of IMUs in analysing movement variability in cycling. However, additional research is required to determine the applicability of analysing movement variability during cycling.
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Affiliation(s)
- Lachlan Winter
- UniSA Allied Health and Human Performance, University of South Australia, Adelaide, SA 5001, Australia
- Alliance for Research in Exercise, Nutrition & Activity (ARENA), University of South Australia, Adelaide, SA 5001, Australia
| | - Clint Bellenger
- UniSA Allied Health and Human Performance, University of South Australia, Adelaide, SA 5001, Australia
- Alliance for Research in Exercise, Nutrition & Activity (ARENA), University of South Australia, Adelaide, SA 5001, Australia
| | - Paul Grimshaw
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha P.O. Box 34110, Qatar
- Faculty of Sciences, Engineering and Technology, Computer and Mathematical Sciences, University of Adelaide, Adelaide, SA 5005, Australia
| | - Robert George Crowther
- UniSA Allied Health and Human Performance, University of South Australia, Adelaide, SA 5001, Australia
- Alliance for Research in Exercise, Nutrition & Activity (ARENA), University of South Australia, Adelaide, SA 5001, Australia
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, VIC 3065, Australia
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Bruyneel AV, Reinmann A, Gafner SC, Sandoz JD, Duclos NC. Does texting while walking affect spatiotemporal gait parameters in healthy adults, older people, and persons with motor or cognitive disorders? A systematic review and meta-analysis. Gait Posture 2023; 100:284-301. [PMID: 36696854 DOI: 10.1016/j.gaitpost.2023.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/07/2022] [Accepted: 01/15/2023] [Indexed: 01/19/2023]
Abstract
BACKGROUND Smartphone use during postural-locomotor tasks is an everyday activity for individuals of all ages in diverse environmental situations and with various health conditions. Nevertheless, the use of smartphones during walking is responsible for many accidents. RESEARCH QUESTION This systematic review and meta-analysis examined spatiotemporal gait parameters during the dual-task situation "texting + gait" versus isolated gait task (single task) in adult persons (>18 years). METHODS Electronic database searches were performed in PubMed, Embase, CINHAL, and LISSA. Two examiners assessed the eligibility and quality of appraisal with the Downs and Black checklist. The standardized mean difference (SMD) with 95 % confidence intervals was calculated to compare single- and dual-task situations. The pooled estimates of the overall effect were computed using a random or fixed effects method, and forest plots were generated. RESULTS AND SIGNIFICANCE A total of 25 studies were included. All studies included healthy adults, with four studies including older persons and three including people with pathological conditions. The walking task was with (N = 4) and without (N = 21) obstacles and in laboratory (N = 21) or ecological conditions (N = 7). The quality scores were 6-8/16 for eight studies, 9-12/16 for seven studies, and more than 12/16 for three studies. During the "texting + gait" tasks, the meta-analysis highlighted a significant impairment of gait speed, step and stride length, cadence, and double and single support (p < 0.05). The spatiotemporal parameters of gait were systematically altered during the texting task regardless of the population and test conditions. However, the quality of the studies is moderate, and few studies have been conducted for people with motor deficiencies. The impact of texting on walking should be better considered to develop prevention actions.
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Affiliation(s)
- Anne-Violette Bruyneel
- Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Switzerland.
| | - Aline Reinmann
- Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Switzerland.
| | - Simone C Gafner
- School of Health Sciences, HES-SO Valais-Wallis, University of Applied Sciences and Arts Western Switzerland, Switzerland.
| | - Jean-David Sandoz
- Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Switzerland.
| | - Noémie C Duclos
- Univ. Bordeaux, INSERM, BPH, U1219, Team ACTIVE, F-33000, Bordeaux, France; Univ.Bordeaux, Collège Sciences de la santé, Institut Universitaire des Sciences de la Réadaptation, F-33000, Bordeaux, France.
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Fohrmann D, Hamacher D, Sanchez-Alvarado A, Potthast W, Mai P, Willwacher S, Hollander K. Reliability of Running Stability during Treadmill and Overground Running. SENSORS (BASEL, SWITZERLAND) 2022; 23:347. [PMID: 36616946 PMCID: PMC9823852 DOI: 10.3390/s23010347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Running stability is the ability to withstand naturally occurring minor perturbations during running. It is susceptible to external and internal running conditions such as footwear or fatigue. However, both its reliable measurability and the extent to which laboratory measurements reflect outdoor running remain unclear. This study aimed to evaluate the intra- and inter-day reliability of the running stability as well as the comparability of different laboratory and outdoor conditions. Competitive runners completed runs on a motorized treadmill in a research laboratory and overground both indoors and outdoors. Running stability was determined as the maximum short-term divergence exponent from the raw gyroscope signals of wearable sensors mounted to four different body locations (sternum, sacrum, tibia, and foot). Sacrum sensor measurements demonstrated the highest reliabilities (good to excellent; ICC = 0.85 to 0.91), while those of the tibia measurements showed the lowest (moderate to good; ICC = 0.55 to 0.89). Treadmill measurements depicted systematically lower values than both overground conditions for all sensor locations (relative bias = -9.8% to -2.9%). The two overground conditions, however, showed high agreement (relative bias = -0.3% to 0.5%; relative limits of agreement = 9.2% to 15.4%). Our results imply moderate to excellent reliability for both overground and treadmill running, which is the foundation of further research on running stability.
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Affiliation(s)
- Dominik Fohrmann
- Institute of Interdisciplinary Exercise Science and Sports Medicine, Faculty of Medicine, MSH Medical School Hamburg, 20457 Hamburg, Germany
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, 50933 Cologne, Germany
| | - Daniel Hamacher
- Institute of Sports Science, Friedrich Schiller University Jena, 07749 Jena, Germany
| | - Alberto Sanchez-Alvarado
- Department of Sports and Exercise Medicine, Institute of Human Movement Science, University of Hamburg, 20148 Hamburg, Germany
| | - Wolfgang Potthast
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, 50933 Cologne, Germany
| | - Patrick Mai
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, 50933 Cologne, Germany
- Department of Mechanical and Process Engineering, Offenburg University of Applied Sciences, 77652 Offenburg, Germany
| | - Steffen Willwacher
- Department of Mechanical and Process Engineering, Offenburg University of Applied Sciences, 77652 Offenburg, Germany
| | - Karsten Hollander
- Institute of Interdisciplinary Exercise Science and Sports Medicine, Faculty of Medicine, MSH Medical School Hamburg, 20457 Hamburg, Germany
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Sarvestan J, Aghaie Ataabadi P, Svoboda Z, Alaei F, Graham RB. The effects of mobile phone use on motor variability patterns during gait. PLoS One 2022; 17:e0267476. [PMID: 35446905 PMCID: PMC9022869 DOI: 10.1371/journal.pone.0267476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 04/10/2022] [Indexed: 11/18/2022] Open
Abstract
Mobile phone use affects the dynamics of gait by impairing visual control of the surrounding environment and introducing additional cognitive demands. Although it has been shown that using a mobile phone alters whole-body dynamic stability, no clear information exists on its impacts on motor variability during gait. This study aimed at assessing the impacts of various types of mobile phone use on motor variability during gait; quantified using the short- and long-term Lyapunov Exponent (λS and λL) of lower limb joint angles and muscle activation patterns, as well as the centre of mass position. Fourteen females and Fifteen males (27.72 ± 4.61 years, body mass: 70.24 ± 14.13 Kg, height: 173.31 ± 10.97 cm) walked on a treadmill under six conditions: normal walking, normal walking in low-light, walking while looking at the phone, walking while looking at the phone in low-light, walking and talking on the phone, and walking and listening to music. Variability of the hip (p λS = .015, λL = .043) and pelvis (p λS = .039, λL = .017) joint sagittal angles significantly increased when the participants walked and looked at the phone, either in normal or in low-light conditions. No significant difference was observed in the variability of the centre of mass position and muscle activation patterns. When individuals walk and look at the phone screen, the hip and knee joints are constantly trying to adopt a new angle to regulate and maintain gait stability, which might put an additional strain on the neuromuscular system. To this end, it is recommended not to look at the mobile phone screen while walking, particularly in public places with higher risks of falls.
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Affiliation(s)
- Javad Sarvestan
- Faculty of Physical Culture, Department of Natural Sciences in Kinanthropology, Palacky University Olomouc, Olomouc, Czech Republic
- * E-mail:
| | - Peyman Aghaie Ataabadi
- Faculty of Physical Education and Sport Sciences, Department of Biomechanics and Sports Injuries, Kharazmi University, Tehran, Iran
| | - Zdeněk Svoboda
- Faculty of Physical Culture, Department of Natural Sciences in Kinanthropology, Palacky University Olomouc, Olomouc, Czech Republic
| | - Fatemeh Alaei
- Faculty of Physical Culture, Department of Natural Sciences in Kinanthropology, Palacky University Olomouc, Olomouc, Czech Republic
| | - Ryan B. Graham
- Faculty of Health Sciences, School of Human Kinetics, University of Ottawa, Ottawa, Canada
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Smith DL, Haworth JL, Brooks EK, Cousins JM. Postural Control, Dual Task Performance and Executive Function Following an Ultramarathon. Percept Mot Skills 2021; 128:2767-2786. [PMID: 34474623 DOI: 10.1177/00315125211044351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
As research into the postural and cognitive effects of ultramarathon running is sparse and still needed, we investigated the effect of ultramarathon running on runners' postural control, dual task postural control and a measure of executive function-the flanker test, expecting fatigue-related deterioration on each measure. We used a pre- and post-test research design with 14 runners who completed (a) postural assessment with eyes open and closed, on a flat surface and on foam during (b) a two-choice reaction time dual task postural assessment, and (c) an executive function modified flanker task. With regard to postural stability, we observed, after running, increased anterior-posterior (AP) path length and AP root mean square (RMS) and reductions in both mediolateral (ML) RMS and ML median frequency. Dual task analysis showed reduced ML RMS prior to the race, whereas the effect was absent afterwards. Reaction times were not significantly altered between pre-post or surface conditions assessments. There were no statistically significant differences in mean modified flanker scores before and after the race. These data demonstrated that, following an endurance run, there were plane specific movement adaptations in postural sway that may have resulted from neuroprotective changes under extreme fatigue.
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Affiliation(s)
- Dean L Smith
- Department of Kinesiology and Health, Miami University, Oxford, Ohio, United States.,Essence of Wellness Chiropractic Center, Eaton, Ohio, United States
| | - Joshua L Haworth
- Department of Human Movement Science, 6918Oakland University, Oakland University, Rochester, Michigan, United States
| | - Eric K Brooks
- Department of Kinesiology and Health, Miami University, Oxford, Ohio, United States
| | - Julie M Cousins
- Department of Kinesiology, 1098Albion College, Albion College, Albion, Michigan, United States
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Crowley P, Vuillerme N, Samani A, Madeleine P. The effects of walking speed and mobile phone use on the walking dynamics of young adults. Sci Rep 2021; 11:1237. [PMID: 33441673 PMCID: PMC7806980 DOI: 10.1038/s41598-020-79584-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 12/10/2020] [Indexed: 11/09/2022] Open
Abstract
Walking while using a mobile phone has been shown to affect the walking dynamics of young adults. However, this has only been investigated using treadmill walking at a fixed walking speed. In this study, the dynamics of over ground walking were investigated using lower trunk acceleration measured over 12 consecutive trials, following differing walking speed and mobile phone use instructions. Higher walking speed significantly increased the proportion of acceleration along the vertical measurement axis, while decreasing the proportion of acceleration along the anteroposterior axis (p < 0.001). Moreover, higher walking speed also resulted in increased sample entropy along all measurement axes (p < 0.05). When walking while texting, the maximum Lyapunov exponent increased along the anteroposterior and vertical measurement axes (p < 0.05), while sample entropy decreased significantly along the vertical axis (p < 0.001). Walking speed and mobile phone use both affect the walking dynamics of young adults. Walking while texting appears to produce a reduction in local dynamic stability and an increase in regularity, however, caution is required when interpreting the extent of this task effect, since walking speed also affected walking dynamics.
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Affiliation(s)
- Patrick Crowley
- Sport Sciences - Performance and Technology, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark. .,University of Grenoble Alpes, AGEIS, Grenoble, France. .,The National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, Denmark.
| | - Nicolas Vuillerme
- Sport Sciences - Performance and Technology, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.,University of Grenoble Alpes, AGEIS, Grenoble, France.,Institut Universitaire de France, Paris, France.,LabCom Telecom4Health, University of Grenoble Alpes and Orange Labs, Grenoble, France
| | - Afshin Samani
- Sport Sciences - Performance and Technology, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Pascal Madeleine
- Sport Sciences - Performance and Technology, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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Effects of the use of mobile phone on postural and locomotor tasks: a scoping review. Gait Posture 2020; 82:233-241. [PMID: 32979702 DOI: 10.1016/j.gaitpost.2020.09.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 07/31/2020] [Accepted: 09/10/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Using a mobile phone while performing a postural and locomotor tasks is a common, daily situation. Conversing or sending messages (SMS) while walking account for a significant share of accidental injuries. Therefore, understanding the consequences of using a mobile phone on balance and walking is important, all the more so when these postural and locomotor tasks are aggravated by a disease. RESEARCH QUESTION Our objective was to conduct a scoping review on the influence of a dual-task situation - generated by the use of mobile phone - on users' postural and/or locomotor tasks. METHODS The literature search was conducted in English on PubMed/Medline and CINHAL databases, using keywords associated with postural and locomotor tasks and with the use of mobile phone. Study location, population, number of subjects, experimental design, types of phone use, evaluated postural-locomotor tasks and expected effects were then analyzed. RESULTS AND SIGNIFICANCE 46 studies were included in this work, 24 of which came from North America. All studies compared postural and locomotor tasks with and without the use of a smartphone. Ten studies also compared at least 2 groups with different characteristics. Only 4 studies included pathological subjects. Various modalities were tested, and most studies focused on walking. Results show that the use of smartphones slows down movement and induces a systematic imbalance, except when listening to music. The dual task of "using the smartphone during a postural or locomotor tasks" induces systematic disturbances of balance and movement, which must be taken into account in the rehabilitation approach. Future studies will have to extend the knowledge regarding pathological situations.
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8
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Reliability of Knee Flexion-Extension Lyapunov Exponent in People With and Without Anterior Cruciate Ligament Deficiency. J Sport Rehabil 2020; 29:253-256. [PMID: 31094623 DOI: 10.1123/jsr.2018-0468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/18/2019] [Accepted: 03/24/2019] [Indexed: 11/18/2022]
Abstract
OBJECTIVES The current study assessed the intrasession and intersession reliability of the knee flexion-extension Lyapunov exponent in patients with anterior cruciate ligament deficiency and healthy individuals. STUDY DESIGN University research laboratory. METHODS Kinematic data were collected in 14 patients with anterior cruciate ligament deficiency and 14 healthy individuals walked on a treadmill at a self-selected, low, and high speed, with and without cognitive load. The intraclass correlation coefficient, standard error of measurement, minimal metrically detectable change, and percentage of coefficient of variation were calculated to assess the reliability. RESULTS The knee flexion-extension Lyapunov exponent had high intrasession reliability, with intraclass correlation coefficients ranging from .83 to .98. In addition, the intersession intraclass correlation coefficient values of these measurements ranged from .35 to .85 regardless of group, gait speed, and dual tasking. In general, relative and absolute reliability were higher in the patients with anterior cruciate ligament deficiency than in the healthy individuals. CONCLUSIONS Although knee flexion-extension Lyapunov exponent demonstrates good intrasession reliability, its low intersession reliability indicates that changes of these measurements between different days should be interpreted with caution.
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Gait speed is more challenging than cognitive load on the stride-to-stride variability in individuals with anterior cruciate ligament deficiency. Knee 2019; 26:88-96. [PMID: 30473374 DOI: 10.1016/j.knee.2018.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 09/22/2018] [Accepted: 11/05/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Several investigations have studied gait variability of individuals with anterior cruciate ligament (ACL) deficiency; however, the effect of dual-tasking on the gait variability of these individuals remained unclear. The aim of the present study was to determine the effect of gait speed and dual-tasking on knee flexion-extension variability in subjects with and without ACL deficiency. METHODS The knee flexion-extension Lyapunov exponent (LyE) was measured in 22 ACL-deficient (Mean±SD) (25.95 ± 4.69 years) and 22 healthy subjects (24.18 ± 3.32 years). They walked at three levels of gait speed in isolation or concurrently with a cognitive task. RESULTS Repeated-measure analyses of variance (ANOVAs) demonstrated that the interaction of group by gait speed was statistically significant. As the gait speed increased from low to high, the knee flexion-extension LyE significantly decreased for the subjects with ACL deficiency (effect size: 0.57, P = 0.01). The interaction of group by cognitive load was not statistically significant (P = 0.07). In addition, the ACL-deficient subjects had statistically slower reaction times than healthy subjects during the dual-task compared with the single-task condition. CONCLUSIONS The ACL-deficient and healthy individuals had a tendency to maintain safe gait. It seems that the ACL-deficient subjects sacrificed the cognitive task more than the healthy individuals to pay more attention toward gait. Additionally, it seems that the gait speed was more challenging than cognitive load on the stride-to-stride variability in the individuals with ACL deficiency.
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Herold F, Hamacher D, Schega L, Müller NG. Thinking While Moving or Moving While Thinking - Concepts of Motor-Cognitive Training for Cognitive Performance Enhancement. Front Aging Neurosci 2018; 10:228. [PMID: 30127732 PMCID: PMC6089337 DOI: 10.3389/fnagi.2018.00228] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 07/09/2018] [Indexed: 12/17/2022] Open
Abstract
The demographic change in industrial countries, with increasingly sedentary lifestyles, has a negative impact on mental health. Normal and pathological aging leads to cognitive deficits. This development poses major challenges on national health systems. Therefore, it is necessary to develop efficient cognitive enhancement strategies. The combination of regular physical exercise with cognitive stimulation seems especially suited to increase an individual's cognitive reserve, i.e., his/her resistance to degenerative processes of the brain. Here, we outline insufficiently explored fields in exercise-cognition research and provide a classification approach for different motor-cognitive training regimens. We suggest to classify motor-cognitive training in two categories, (I) sequential motor-cognitive training (the motor and cognitive training are conducted time separated) and (II) simultaneous motor-cognitive training (motor and cognitive training are conducted sequentially). In addition, simultaneous motor-cognitive training may be distinguished based on the specific characteristics of the cognitive task. If successfully solving the cognitive task is not a relevant prerequisite to complete the motor-cognitive task, we would consider this type of training as (IIa) motor-cognitive training with additional cognitive task. In contrast, in ecologically more valid (IIb) motor cognitive training with incorporated cognitive task, the cognitive tasks are a relevant prerequisite to solve the motor-cognitive task. We speculate that incorporating cognitive tasks into motor tasks, rather than separate training of mental and physical functions, is the most promising approach to efficiently enhance cognitive reserve. Further research investigating the influence of motor(-cognitive) exercises with different quantitative and qualitative characteristics on cognitive performance is urgently needed.
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Affiliation(s)
- Fabian Herold
- Research Group Neuroprotection, German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Dennis Hamacher
- Department of Sport Science, Institute III, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Lutz Schega
- Department of Sport Science, Institute III, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Notger G. Müller
- Research Group Neuroprotection, German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
- Department of Neurology, Medical Faculty, Otto von Guericke University Magdeburg, Magdeburg, Germany
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Niederer D, Bumann A, Mühlhauser Y, Schmitt M, Wess K, Engeroff T, Wilke J, Vogt L, Banzer W. Specific smartphone usage and cognitive performance affect gait characteristics during free-living and treadmill walking. Gait Posture 2018; 62:415-421. [PMID: 29649707 DOI: 10.1016/j.gaitpost.2018.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 04/04/2018] [Accepted: 04/05/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Mobile phone tasks like texting, typing, and dialling during walking are known to impact gait characteristics. Beyond that, the effects of performing smartphone-typical actions like researching and taking self-portraits (selfie) on gait have not been investigated yet. RESEARCH QUESTION We aimed to investigate the effects of smartphone usage on relevant gait characteristics and to reveal potential association of basic cognitive and walking plus smartphone dual-task abilities. METHODS Our cross-sectional, cross-over study on physically active, healthy participants was performed on two days, interrupted by a 24-h washout in between. Assessments were: 1) Cognitive testing battery consisting of the trail making test (TMT A and B) and the Stroop test 2) Treadmill walking under five smartphone usage conditions: no use (control condition), reading, dialling, internet searching and taking a selfie in randomized order. Kinematic and kinetic gait characteristics were assessed to estimate conditions influence. RESULTS In our sample of 36 adults (24.6 ± 1 years, 23 female, 13 male), ANCOVAs followed by post-hoc t-tests revealed that smartphone usage impaired all tested gait characteristics: gait speed (decrease, all conditions): F = 54.7, p < 0.001; cadence (increase, all): F = 38.3, p < 0.001; double stride length (decrease, all): F = 33.8, p < 0.001; foot external rotation (increase during dialling, researching, selfie): F = 16.7, p < 0.001; stride length variability (increase): F = 11.7, p < 0.001; step width variability (increase): F = 5.3, p < 0.001; step width (Friedmann test and Wilcoxon Bonferroni-Holm-corrected post-hoc analyses, increase): Z = -2.3 to -2.9; p < 0.05); plantar pressure proportion (increase during reading and researching) (Z = -2.9; p < 0.01). The ability to keep usual gait quality during smartphone usage was systematically associated with the TMT B time regarding cadence and double stride length for reading (r = -0.37), dialling (r = -0.35) and taking a selfie (r = -0.34). SIGNIFICANCE Smartphone usage substantially impacts walking characteristics in most situations. Changes of gait patterns indicate higher cognitive loads and lower awareness.
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Affiliation(s)
- Daniel Niederer
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany.
| | - Anke Bumann
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Yvonne Mühlhauser
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Mareike Schmitt
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Katja Wess
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Tobias Engeroff
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Jan Wilke
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Lutz Vogt
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Winfried Banzer
- Department of Sports Medicine, Goethe University Frankfurt, Frankfurt am Main, Germany
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12
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Tamburini P, Storm F, Buckley C, Bisi MC, Stagni R, Mazzà C. Moving from laboratory to real life conditions: Influence on the assessment of variability and stability of gait. Gait Posture 2018; 59:248-252. [PMID: 29100144 DOI: 10.1016/j.gaitpost.2017.10.024] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 10/23/2017] [Accepted: 10/25/2017] [Indexed: 02/02/2023]
Abstract
The availability of wearable sensors allows shifting gait analysis from the traditional laboratory settings, to daily life conditions. However, limited knowledge is available about whether alterations associated to different testing environment (e.g. indoor or outdoor) and walking protocols (e.g. free or controlled), result from actual differences in the motor behaviour of the tested subjects or from the sensitivity to these changes of the indexes adopted for the assessment. In this context, it was hypothesized that testing environment and walking protocols would not modify motor control stability in the gait of young healthy adults, who have a mature and structured gait pattern, but rather the variability of their motor pattern. To test this hypothesis, data from trunk and shank inertial sensors were collected from 19 young healthy participants during four walking tasks in different environments (indoor and outdoor) and in both controlled (i.e. following a predefined straight path) and free conditions. Results confirmed what hypothesized: variability indexes (Standard deviation, Coefficient of variation and Poincaré plots) were significantly influenced by both environment and walking conditions. Stability indexes (Harmonic ratio, Short term Lyapunov exponents, Recurrence quantification analysis and Sample entropy), on the contrary, did not highlight any change in the motor control. In conclusion, this study highlighted an influence of environment and testing condition on the assessment of specific characteristics of gait (i.e. variability and stability). In particular, for young healthy adults, both environment and testing conditions affect gait variability indexes, whereas neither affect gait stability indexes.
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Affiliation(s)
- Paola Tamburini
- Department of Electric, Electronic and Information Engineering "Guglielmo Marconi" - DEI, Alma Mater Studiorum - University of Bologna, Italy.
| | - Fabio Storm
- Insigneo Institute for in silico medicine, University of Sheffield, Sheffield, United Kingdom; Department of Oncology and Metabolism, University of Sheffield, Sheffield, United Kingdom
| | - Chris Buckley
- Insigneo Institute for in silico medicine, University of Sheffield, Sheffield, United Kingdom; Department of Mechanical Engineering, University of Sheffield, Sheffield, United Kingdom
| | - Maria Cristina Bisi
- Department of Electric, Electronic and Information Engineering "Guglielmo Marconi" - DEI, Alma Mater Studiorum - University of Bologna, Italy
| | - Rita Stagni
- Department of Electric, Electronic and Information Engineering "Guglielmo Marconi" - DEI, Alma Mater Studiorum - University of Bologna, Italy
| | - Claudia Mazzà
- Insigneo Institute for in silico medicine, University of Sheffield, Sheffield, United Kingdom; Department of Mechanical Engineering, University of Sheffield, Sheffield, United Kingdom
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Herold F, Wiegel P, Scholkmann F, Thiers A, Hamacher D, Schega L. Functional near-infrared spectroscopy in movement science: a systematic review on cortical activity in postural and walking tasks. NEUROPHOTONICS 2017; 4:041403. [PMID: 28924563 PMCID: PMC5538329 DOI: 10.1117/1.nph.4.4.041403] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 06/23/2017] [Indexed: 05/07/2023]
Abstract
Safe locomotion is a crucial aspect of human daily living that requires well-functioning motor control processes. The human neuromotor control of daily activities such as walking relies on the complex interaction of subcortical and cortical areas. Technical developments in neuroimaging systems allow the quantification of cortical activation during the execution of motor tasks. Functional near-infrared spectroscopy (fNIRS) seems to be a promising tool to monitor motor control processes in cortical areas in freely moving subjects. However, so far, there is no established standardized protocol regarding the application and data processing of fNIRS signals that limits the comparability among studies. Hence, this systematic review aimed to summarize the current knowledge about application and data processing in fNIRS studies dealing with walking or postural tasks. Fifty-six articles of an initial yield of 1420 publications were reviewed and information about methodology, data processing, and findings were extracted. Based on our results, we outline the recommendations with respect to the design and data processing of fNIRS studies. Future perspectives of measuring fNIRS signals in movement science are discussed.
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Affiliation(s)
- Fabian Herold
- Otto von Guericke University Magdeburg, Institute III, Department of Sport Science, Magdeburg, Germany
- Address all correspondence to: Fabian Herold, E-mail:
| | - Patrick Wiegel
- University of Freiburg, Department of Sport Science, Freiburg, Germany
| | - Felix Scholkmann
- University of Zurich, University Hospital Zurich, Department of Neonatology, Biomedical Optics Research Laboratory, Zurich, Switzerland
| | - Angelina Thiers
- Otto von Guericke University Magdeburg, Institute III, Department of Sport Science, Magdeburg, Germany
| | - Dennis Hamacher
- Otto von Guericke University Magdeburg, Institute III, Department of Sport Science, Magdeburg, Germany
| | - Lutz Schega
- Otto von Guericke University Magdeburg, Institute III, Department of Sport Science, Magdeburg, Germany
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Transition from shod to barefoot alters dynamic stability during running. Gait Posture 2017; 56:31-36. [PMID: 28482203 DOI: 10.1016/j.gaitpost.2017.04.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 04/25/2017] [Accepted: 04/27/2017] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Barefoot running recently received increased attention, with controversial results regarding its effects on injury risk and performance. Numerous studies examined the kinetic and kinematic changes between the shod and the barefoot condition. Intrinsic parameters such as the local dynamic stability could provide new insight regarding neuromuscular control when immediately transitioning from one running condition to the other. We investigated the local dynamic stability during the change from shod to barefoot running. We further measured biomechanical parameters to examine the mechanisms governing this transition. METHODS Twenty habitually shod, young and healthy participants ran on a pressure plate-equipped treadmill and alternated between shod and barefoot running. We calculated the largest Lyapunov exponents as a measure of errors in the control of the movement. Biomechanical parameters were also collected. RESULTS Local dynamic stability decreased significantly (d=0.41; 2.1%) during barefoot running indicating worse control over the movement. We measured higher cadence (d=0.35; 2.2%) and total flight time (d=0.58; 19%), lower total contact time (d=0.58; -5%), total vertical displacement (d=0.39; -4%), and vertical impulse (d=1.32; 11%) over the two minutes when running barefoot. The strike index changed significantly (d=1.29; 237%) towards the front of the foot. CONCLUSIONS Immediate transition from shod to the barefoot condition resulted in an increased instability and indicates a worst control over the movement. The increased instability was associated with biomechanical changes (i.e. foot strike patterns) of the participants in the barefoot condition. Possible reasons why this instability arises, might be traced in the stance phase and particularly in the push-off. The decreased stability might affect injury risk and performance.
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Krasovsky T, Weiss PL, Kizony R. A narrative review of texting as a visually-dependent cognitive-motor secondary task during locomotion. Gait Posture 2017; 52:354-362. [PMID: 28043057 DOI: 10.1016/j.gaitpost.2016.12.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 12/12/2016] [Accepted: 12/20/2016] [Indexed: 02/02/2023]
Abstract
Typing while walking is an example of people's ability to interact with technology while engaged in real life activities. Indeed, an increasing number of studies have investigated the typing of text messages (texting) as a dual task during locomotion. The objective of this review is to (1) describe the task requirements of texting-while-walking, (2) evaluate the measurement and psychometric properties of texting as a dual task, and (3) formulate methodological recommendations for researchers who use and report on texting-while-walking. Twenty studies which used texting as a dual task during gait were identified via a literature search. The majority of these studies examined texting among young healthy adults and showed that, like other dual tasks, texting-while-walking caused decrements in both gait and texting performance. The cause of these decrements was most likely related to increased visual task requirements, task-dependent cognitive requirements and fine motor skills. Texting-while-walking gait measures were repeatable, but texting performance showed poor reliability which further depended on skill. Preliminary results show that texting-while-walking performance may discriminate between populations (e.g., young vs. older adults) but no studies have yet examined its predictive validity (e.g., for fall risk). In conclusion, texting-while-walking is an ecologically-valid dual task for locomotion which has become much more commonly used in recent years. As opposed to other secondary tasks such as subtraction by 7 or generating words, texting may challenge various cognitive, visual and sensorimotor domains depending on its content. This imposes task-specific methodological challenges on future research, which are discussed.
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Affiliation(s)
- T Krasovsky
- Department of Occupational Therapy, University of Haifa, Haifa, Israel; Pediatric Rehabilitation Department, The Edmond and Lily Safra Children's Hospital, Sheba Medical Center (Tel Hashomer), Ramat-Gan, Israel.
| | - P L Weiss
- Department of Occupational Therapy, University of Haifa, Haifa, Israel
| | - R Kizony
- Department of Occupational Therapy, University of Haifa, Haifa, Israel; Center of Advanced Technologies in Rehabilitation, Sheba Medical Center (Tel Hashomer), Ramat-Gan, Israel
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Hamacher D, Törpel A, Hamacher D, Schega L. The effect of physical exhaustion on gait stability in young and older individuals. Gait Posture 2016; 48:137-139. [PMID: 27239774 DOI: 10.1016/j.gaitpost.2016.05.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 04/21/2016] [Accepted: 05/08/2016] [Indexed: 02/02/2023]
Abstract
Fatigue directly affects key features of the sensorimotor system which disorganizes voluntary control of movement accuracy. Local dynamic stability of walking is considered a sensitive measure for neuromuscular performance. To gain greater insight in the role of fatigue in motor behaviour in older and young adults during walking, the current experiment analyses gait patterns of healthy young but maximal fatigued individuals and gait patterns in submaximal fatigued older adults. Ten young and 18 older subjects performed a bicycle incremental exercise test on a cycle ergometer. In young subjects, the incremental test was performed until total physical exhaustion. In older subjects, the test was performed until submaximal fatigue. Prior to and after the test, the participants walked for 2.5min on a treadmill. Based on linear acceleration data of the trunk, local dynamic stability was assessed. Student's t-test was used to check if differences are statistically significant. In young individuals, we found a significant decrease in the finite-time maximal Lyapunov exponents between unfatigued walking and maximal fatigued walking. In older participants, significant increases in the finite-time maximal Lyapunov between unfatigued walking and submaximal fatigued walking were observed. The results indicate that (1) young and sporty subjects become more stable after having passed a maximum cardiopulmonary exercise test on a cycle ergometer while (2) older individuals walk less locally stable in a submaximal fatigued condition. Older cohorts might show a higher fall risk when they are physically fatigued.
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Affiliation(s)
- Dennis Hamacher
- Department of Sport Science, Otto von Guericke University Magdeburg, Germany.
| | - Alexander Törpel
- Department of Sport Science, Otto von Guericke University Magdeburg, Germany
| | - Daniel Hamacher
- Department of Sport Science, Friedrich Schiller University Jena, Germany
| | - Lutz Schega
- Department of Sport Science, Otto von Guericke University Magdeburg, Germany
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