Negotiating stairs with an inconsistent riser: Implications for stepping safety

Journal article

Francksen, NC, Ackermans, TMA, Holzer, D, Ebner, SA, Maganaris, CN, Hollands, MA, Karamanidis, K, Roys, M and O'Brien, TD (2020). Negotiating stairs with an inconsistent riser: Implications for stepping safety. Applied Ergonomics. 87, pp. 103131-103131. https://doi.org/10.1016/j.apergo.2020.103131
AuthorsFrancksen, NC, Ackermans, TMA, Holzer, D, Ebner, SA, Maganaris, CN, Hollands, MA, Karamanidis, K, Roys, M and O'Brien, TD
Abstract

© 2020 Elsevier Ltd Stairs are associated with falls, especially when step dimensions are inconsistent. However, the mechanisms by which inconsistencies cause this higher risk are mostly theoretical. In this experimental study we quantified the effect of inconsistent rise heights on biomechanical measurements of stepping safety from younger (n = 26) and older adults (n = 33). In ascent, both groups decreased foot clearance (~9 mm) over the inconsistently higher step (F(1,56) = 48.4, p < 0.001). In descent, they reduced foot contact length on the higher step by 3% (F(1,56) = 9.1, p < 0.01). Reduced clearance may result in a toe-catch potentially leading to a trip, while reduced foot contact lengths increase the risk of overstepping which may also lead to a fall. These effects occurred because participants did not alter their foot trajectories, indicating they either did not detect or were not able to adjust to the inconsistent rise, increasing the likelihood of a fall. Consistent stair construction is vital, and existing inconsistencies should be identified and safety interventions developed.

Keywords Variable dimensions; Step geometry; Fall risk
Year2020
JournalApplied Ergonomics
Journal citation87, pp. 103131-103131
PublisherElsevier BV
ISSN0003-6870
Digital Object Identifier (DOI)https://doi.org/10.1016/j.apergo.2020.103131
Publication dates
Print01 Sep 2020
Online07 May 2020
Publication process dates
Accepted18 Apr 2020
Deposited15 Jun 2020
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Open
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Use of a Lucas-Kanade-Based Template Tracking Algorithm to Examine In Vivo Tendon Excursion during Voluntary Contraction Using Ultrasonography.
Karamanidis, K, Travlou, A, Krauss, P and Jaekel, U (2016). Use of a Lucas-Kanade-Based Template Tracking Algorithm to Examine In Vivo Tendon Excursion during Voluntary Contraction Using Ultrasonography. Ultrasound in Medicine and Biology. 42 (7), pp. 1689-1700. https://doi.org/10.1016/j.ultrasmedbio.2016.02.019
Visual and proprioceptive contributions to postural control of upright stance in unilateral vestibulopathy.
Eysel-Gosepath, K, McCrum, C, Epro, G, Brüggemann, G-P and Karamanidis, K (2016). Visual and proprioceptive contributions to postural control of upright stance in unilateral vestibulopathy. Somatosensory and Motor Research. 33 (2), pp. 72-78. https://doi.org/10.1080/08990220.2016.1178635
Matching participants for triceps surae mechanical properties eliminates age-related differences in drop jump performance
Koenig, M, Hemmers, S, McCrum, C, Epro, G, Ackermans, TMA, Hartmann, U and Karamanidis, K (2016). Matching participants for triceps surae mechanical properties eliminates age-related differences in drop jump performance. 11th Joint Conference on Motor Control & Learning, Biomechanics & Training of the German Society of Sports Sciences. Darmstadt, Germany 28 - 30 Sep 2016
Aging and the effects of a half marathon on Achilles tendon force-elongation relationship.
Ackermans, TMA, Epro, G, McCrum, C, Oberländer, KD, Suhr, F, Drost, MR, Meijer, K and Karamanidis, K (2016). Aging and the effects of a half marathon on Achilles tendon force-elongation relationship. European Journal of Applied Physiology. 116 (11-12), pp. 2281-2292. https://doi.org/10.1007/s00421-016-3482-z
Age-related differences in drop jump performance are eliminated when triceps surae mechanical properties are matched
Koenig, M, Hemmers, S, McCrum, C, Epro, G, Ackermans, TMA, Hartmann, U and Karamanidis, K (2016). Age-related differences in drop jump performance are eliminated when triceps surae mechanical properties are matched. Dutch Society for Movement Sciences (VvBN) PhD Day 2016. Maastricht 09 - 09 Nov 2016
Effect of exercise-induced enhancement of the leg-extensor muscle-tendon unit capacities on ambulatory mechanics and knee osteoarthritis markers in the elderly.
Karamanidis, K, Oberländer, KD, Niehoff, A, Epro, G and Brüggemann, G-P (2014). Effect of exercise-induced enhancement of the leg-extensor muscle-tendon unit capacities on ambulatory mechanics and knee osteoarthritis markers in the elderly. PLoS ONE. 9 (6). https://doi.org/10.1371/journal.pone.0099330