Comparison of the Accuracy of Measurement of Floor Reaction Force and Lower Extremity Joint Moments Calculated Using Different Force Plate Measurement Methods

Katsuhira, Junji; Yamamoto, Sumiko; Asahara, Sanae; Maruyama, Hitosi

doi:10.1589/jpts.19.171

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…The tread depth and riser height for both staircases were 300 mm and 160 mm, respectively. All components of floor reaction forces were reset to zero to eliminate the effect of the weights of the staircases before initiating the experimental trials 14 ) . All participants were instructed to descend while barefoot at a self-selected speed without any assistive devices.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical Analysis of Stair Descent in Patients with Knee Osteoarthritis

Igawa

Katsuhira

2014

J Phys Ther Sci

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[Purpose] The purposes of this study were to investigate the lower extremity joint kinematics and kinetics of patients with the knee osteoarthritis (knee OA) during stair descent and clarify the biomechanical factors related to their difficulty in stair descent. [Subjects and Methods] Eight healthy elderly persons and four knee OA patients participated in this study. A 3-D motion analysis system and force plates were employed to measure lower extremity joint angles, ranges of motion, joint moments, joint powers, and ratios of contribution for the joint powers while descending stairs. [Results] Knee joint flexion angle, extension moment, and negative power during the early stance phase in the knee OA group were smaller than those in the healthy subjects group. However, no significant changes in these parameters in the ankle joint were observed between the two subject groups. [Conclusion] Knee OA patients could not use the knee joint to absorb impact during the early stance phase of stair descent. Hence, they might compensate for the roles played by the intact knee joint by mainly using ipsilateral ankle kinematics and kinetics.

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Section: Methodsmentioning

confidence: 99%

Biomechanical Analysis of Stair Descent in Patients with Knee Osteoarthritis

Igawa

Katsuhira

2014

J Phys Ther Sci

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“…The stairs were made to match the size and the height of the force plate placed beneath the staircase, which consisted of right and left parts (Figure 1 ). During the experiment, a non-slip mat was placed on the force plate so that none of the stairs were in contact with each other [ 9 ]. The force plate level was reset to the zero base line to eliminate the weight of the stair.…”

Section: Methodsmentioning

confidence: 99%

Effects of methods of descending stairs forwards versus backwards on knee joint force in patients with osteoarthritis of the knee: a clinical controlled study

Hasegawa

Chin

Oki

et al. 2010

BMC Sports Sci Med Rehabil

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BackgroundThe aim of this study was to investigate the kinetic characteristics of compensatory backward descending movement performed by patients with osteoarthritis of the knee.MethodsUsing a three-dimensional motion analysis system, we investigated lower extremity joint angles, joint moments, joint force of the support leg in forward and backward descending movements on stairs, and joint force of the leading leg at landing in 7 female patients with osteoarthritis of the knee.ResultsCompared with the forward descending movement, knee joint angle, joint moment and joint force of the support leg all decreased in the backward descending movement. Joint force of the leading leg at landing was also reduced in the backward descending movement. In addition, we confirmed that the center of body mass was mainly controlled by the knee and ankle joints in the forward descending movement, and by the hip joint in the backward descending movement.ConclusionsSince it has been reported that knee flexion angle and extensor muscle strength are decreased in patients with osteoarthritis of the knee, we believe that backward descending movement is an effective method to use the hip joint to compensate for these functional defects. In addition, due to the decreased knee joint force both in the leading and support legs in backward descending movement, the effectiveness of compensatory motion for pain control and knee joint protection was also suggested.

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“…In addition, a non-slip mat was placed on the force plates so that none of the stairs would come in contact with each other. The stairs were made to match the size of the force plate and the dummy force plate, and was comprised of four parts: anterior left; anterior right; posterior left; and posterior right 12) .…”

Section: Methodsmentioning

confidence: 99%

Study on the Effects of Different Stair-Descending Methods on Knee Angle, Joint Moment and Joint Force

2010

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Abstract. [Purpose] In general, people with bilateral osteoarthritis descend stairs sideways or backwards as compensatory movements. However, to the best of our knowledge, no studies have investigated these movements. The objective of the present study was to ascertain the effects of descending forwards and descending backwards on kinetic changes in the knee joint, to ascertain the optimal stair descending method for minimizing stress on the knee joint.[Subjects] Subjects were 30 adult women with no orthopedic or neurological disorders.[Methods] With step heights (riser heights) of 10, 15, 20 and 25 cm, changes in knee flexion angle, extension moment and joint force were measured when descending forwards and descending backwards using a three dimensional motion analysis system. [Results] Peak knee flexion angle, peak knee extension moment and peak knee joint forces observed in descending stairs backwards were smaller than those in the descending forwards action.[Conclusion] The present results suggest that descending stairs backwards for osteoarthritis patients is effective in protecting the knees, alleviating pain and acquiring compensatory movements.

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Comparison of the Accuracy of Measurement of Floor Reaction Force and Lower Extremity Joint Moments Calculated Using Different Force Plate Measurement Methods

Cited by 8 publications

References 10 publications

Biomechanical Analysis of Stair Descent in Patients with Knee Osteoarthritis

Biomechanical Analysis of Stair Descent in Patients with Knee Osteoarthritis

Effects of methods of descending stairs forwards versus backwards on knee joint force in patients with osteoarthritis of the knee: a clinical controlled study

Study on the Effects of Different Stair-Descending Methods on Knee Angle, Joint Moment and Joint Force

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