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Marcos R. Kunzler, Emmanuel S. da Rocha, Maarten F. Bobbert, Jacques Duysens and Felipe P. Carpes

Background:

In negotiating stairs, low foot clearance increases the risk of tripping and a fall. Foot clearance may be related to physical fitness, which differs between active and sedentary participants, and be acutely affected by exercise. Impaired stair negotiation could be an acute response to exercise. Here we determined acute changes in foot clearances during stair walking in sedentary (n = 15) and physically active older adults (n = 15) after prolonged exercise.

Methods:

Kinematic data were acquired during negotiation with a 3-steps staircase while participants walked at preferred speed, before and after 30 min walking at preferred speed and using a treadmill. Foot clearances were compared before and after exercise and between the groups.

Results:

Sedentary older adults presented larger (0.5 cm for lead and 2 cm for trail leg) toe clearances in ascent, smaller (0.7 cm) heel clearance in the leading foot in descent, and larger (1 cm) heel clearance in the trailing foot in descent than physically active.

Conclusion:

Sedentary older adults negotiate stairs in a slightly different way than active older adults, and 30 min walking at preferred speed does not affect clearance in stair negotiation.

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Susana Meireles, Neil D. Reeves, Richard K. Jones, Colin R. Smith, Darryl G. Thelen and Ilse Jonkers

Stair negotiation and level walking are common activities of daily living. However, stair negotiation is biomechanically more challenging, 1 demanding a higher range of motion in the lower extremity, 2 higher moments acting at the knee joint, 3 – 5 and, consequently, increased quadriceps demands

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Cui Zhang, Qipeng Song, Wei Sun and Yu Liu

Stair negotiation, such as ascent or descent, constitutes a major daily activity of living among older adults and is prone to high risk ( De Lima, Neto, & Teixeira, 2010 ; Hof, Bockel, Schoppen, & Postema, 2007 ). It contributes to 26% of self-reported falls on account of the environment

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Alison C. Novak and Brenda Brouwer

This study describes and contrasts the kinematics and kinetics of stair ambulation in people with chronic stroke and healthy control subjects. Three-dimensional motion data were collected from 10 persons with stroke (7 males) and 10 sex and age-matched older adults as they ascended and descended an instrumented staircase at self-selected speed with and without a handrail. Ankle, knee and hip joint angle and moment profiles were generated during stance and range of motion and peak moments were contrasted between groups, sides (stroke only) and condition. Cadence was lower in stroke than controls, although the kinematic profiles appeared similar during ascent and decent. Notable differences in joint kinetics were evident as the peak extensor moments were typically lower on the affected side in stroke compared with controls and the less affected side. These differences accounted for the lower magnitude net extensor support moment. The lower affected side hip abductor moments likely limited lateral stability. Handrail use tended to reduce the peak moments on the affected side only leading to more side-to-side differences than occurred without the handrail. The findings reveal differences in task performance between stroke and healthy groups that help inform rehabilitation practice.

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Harsh H. Buddhadev and Philip E. Martin

 al., 2011 ), and stair negotiation ( Hortobágyi & DeVita, 2000 ). Thus, for weight-bearing activities, greater coactivation could be viewed as an age-related compensatory strategy that comes with a cost. Higher antagonist coactivation increases joint stiffness and thereby may enhance stability during these

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Ming Fung Godfrey Lui, Hung Kay Daniel Chow, Wai Ming Kenny Wong and Wai Nam William Tsang

, P.R. ( 2000 ). Stair negotiation in older people: A review . Journal of the American Geriatrics Society, 48 , 567 – 580 . PubMed ID: 10811553 doi:10.1111/j.1532-5415.2000.tb05006.x 10.1111/j.1532-5415.2000.tb05006.x Suhner , A. , Schlagenhauf , P. , Tschopp , A. , Haur-Bionda , R

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Dominique C. Leibbrandt and Quinette A. Louw

daily living such as walking, squatting, and stair negotiation. These are activities that often increase AKP. 2 To our knowledge, no studies that assess the effects of an FMR approach during squatting, stair climbing, and gait on subjects with AKP have been done. Based on the promising results from 2

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Chen Deng, Jason C. Gillette and Timothy R. Derrick

during activities of daily living such as stair negotiation. Modification of these activities may minimize further damage to an injured site, while still encouraging osteogenesis as a preventative measure. A detailed analysis of the proximal femur load is necessary to understand the mechanisms of failure

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John H. Challis

height in building codes, but there are still some variations in riser heights ( Templer, 1992 ). These sequential jumps during stair negotiation make the metabolic cost of stair climbing greater than that of level walking ( Teh & Aziz, 2002 ). As riser height increases, so do the metabolic costs of