Stair climbing

About: Stair climbing is a research topic. Over the lifetime, 1610 publications have been published within this topic receiving 30504 citations.

Brief Vigorous Stair Climbing Effectively Improves Cardiorespiratory Fitness in Patients With Coronary Artery Disease: A Randomized Trial

Abstract: Background: Cardiac rehabilitation exercise reduces the risk of secondary cardiovascular disease. Interval training is a time-efficient alternative to traditional cardiac rehabilitation exercise and stair climbing is an accessible means. We aimed to assess the effectiveness of a high-intensity interval stair climbing intervention on improving cardiorespiratory fitness ( V ˙ O 2 peak ) compared to standard cardiac rehabilitation care. Methods: Twenty participants with coronary artery disease (61 ± 7 years, 18 males, two females) were randomly assigned to either traditional moderate-intensity exercise (TRAD) or high-intensity interval stair climbing (STAIR). V ˙ O 2 peak was assessed at baseline, following 4 weeks of six supervised exercise sessions and after 8 weeks of ~24 unsupervised exercise sessions. TRAD involved a minimum of 30 min at 60-80%HRpeak, and STAIR consisted of three bouts of six flights of 12 stairs at a self-selected vigorous intensity (~90 s/bout) separated by recovery periods of walking (~90 s). This study was registered as a clinical trial at clinicaltrials.gov (NCT03235674). Results: Two participants could not complete the trial due to the time commitment of the testing visits, leaving n = 9 in each group who completed the interventions without any adverse events. V ˙ O 2 peak increased after supervised and unsupervised training in comparison to baseline for both TRAD [baseline: 22.9 ± 2.5, 4 weeks (supervised): 25.3 ± 4.4, and 12 weeks (unsupervised): 26.5 ± 4.8 mL/kg/min] and STAIR [baseline: 21.4 ± 4.5, 4 weeks (supervised): 23.4 ± 5.6, and 12 weeks (unsupervised): 25 ± 6.2 mL/kg/min; p (time) = 0.03]. During the first 4 weeks of training (supervised) the STAIR vs. TRAD group had a higher %HRpeak (101 ± 1 vs. 89 ± 1%; p ≤ 0.001), across a shorter total exercise time (7.1 ± 0.1 vs. 36.7 ± 1.1 min; p = 0.009). During the subsequent 8 weeks of unsupervised training, %HRpeak was not different (87 ± 8 vs. 96 ± 8%; p = 0.055, mean ± SD) between groups, however, the STAIR group continued to exercise for less time per session (10.0 ± 3.2 vs. 24.2 ± 17.0 min; p = 0.036). Conclusions: Both brief, vigorous stair climbing, and traditional moderate-intensity exercise are effective in increasing V ˙ O 2 peak , in cardiac rehabilitation exercise programmes.

Physical modelling of hip joint forces in stair climbing

Abstract: A test device has been developed and validated to simulate physiologic loading of the hip during stair climbing. Forces about the hip joint were measured in static simulations of stair climbing using simulated extensor, abductor and adductor muscle groups to support the joint. Femoral flexion angle (to model step length and height) and applied hip flexion moment (to model trunk lean) were varied to examine the effects of different loading conditions on the hip. In stair climbing the maximum total joint force was six times body weight at 34 degrees of femoral flexion and 60 N m of hip flexion moment. Joint forces increased with hip flexion moment and varied little with femoral flexion angle, except for the posteriorly directed force. This component, which twists implants about the femoral shaft, increased with femoral flexion angle but changed little with hip flexion moment.

Dynamic analysis for stair-climbing of a new-style wheelchair robot

Abstract: In this paper, a wheelchair robot equipped with new-style variable-geometry-tracked mechanism is proposed. Different from general variable-geometry-tracked mechanisms, the key feature of this new-style mechanism is that it can adapt to convex terrain and transform to concave geometry by active control of track tension, based on which the ability of stair-climbing of traditional wheelchair is improved. For obtaining the dynamic characteristic of stair-climbing which is crucial to the robot design, the locomotion and transformation rule for the robot during different climbing phases is presented, the dynamic models of the robot whole body and its fundamental components are established. Finally the dynamic simulation for stair-climbing is performed, and the drive characteristic of the robot under different climbing conditions is obtained. The simulation results provide theoretical foundation to the future work of driving system design and mechanical parameters optimization.

Full-automatic hydraulic lifting marching type electric stair climbing wheelchair

Abstract: The invention relates to a full-automatic hydraulic lifting marching type electric stair climbing wheelchair which can provide a walking replacing tool for a patient without the lower limb walking function to independently walk up and down stairs. The full-automatic hydraulic lifting marching type electric stair climbing wheelchair is characterized in that a simple hydraulic power system synchronously drives two pairs of light hydraulic cylinders which are installed on sliding rails installed on the two sides of a cuboid seat, altitude differences of the light hydraulic cylinders are adjustable, the part of the seat vertically ascends or descends;. A direct current motor drives a rack to enable the hydraulic cylinder and the seat to be alternatively, horizontally and forwards moved to achieve the stair climbing motion. When the seat is moved to a next stage of step, the front portions of the two miniature hydraulic cylinders installed on the inner side of the front portion of the seat can be stably and reliably supported to the prior stage of step. The back portion of the upper layer of the seat of a U-type bushing type structure can be backwards moved to the position above a toilet bowl through the sliding rails, holes are reserved, and a rider can independently go to a toilet. The wheelchair can steer at will in situ in narrow space through a hydraulic steering mechanism installed in the middle of the lower portion of the wheelchair.