Effect of a wearing overlap length change of the knee joint supporter during a stop-jump task

Hayata, Gou; Miyakawa, Takeshi

doi:10.7600/jspfsm.63.279

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Additionally, we observed that increasing the wearing pressure tends to suppress lateral propulsion which is probably influenced by the output of muscles around the knee joint. In a previous study, pressure stimulation changed rectus femoris muscle activity and knee angle improved jumping movements [18,19]. Likewise, a study comparing muscle strength when wearing knee orthosis at different wearing pressures reported that with increments in the wearing pressure, the muscle output of the knee joint muscles increased and played an auxiliary role [20].…”

Section: Discussionmentioning

confidence: 99%

Effect of Knee Orthosis on Lateral Thrust in Patients with Knee Osteoarthritis

Yamamoto¹,

Endo²,

Wada³

2022

Adv. sci. technol. eng. syst. j.

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To examine the effects of wearing a flexible knee orthosis (FKO) on the lateral thrust in patients with knee osteoarthritis (OA) by changing the wearing pressure. This study was a cross-sectional study. Thirteen patients (mean age: 82.8 ± 7.5years with Kellgren Lawrence Stages I and II knee OA were included and prescribed FKO. Patient with osteoarthritis of the knee was attending outpatient rehabilitation. Using a wireless 3-axis accelerometer, we analyzed the lateral thrust in the proximal lower leg during walking (10 m) with the knee orthosis under different wearing pressures (without orthosis, using "standard force" of application, and using "tight force"). The peak values in the outward direction of the gait cycle over the three experimental conditions were selected for analysis. The mean values for patients with K-L stages I and II were calculated and compared. We found that "tight force," i.e., tightening the hook-and-loop fastener of the knee orthosis to its maximum, resulted in significantly lower lateral thrust compared to the absence of an orthosis. The effect was more pronounced in K-L Stage II patients. Our findings confirm that increasing the wearing pressure of the knee orthosis reduces lateral thrust in patients with knee OA. In Stage 1, the lateral thrust could be suppressed by the "standard force," but the lateral thrust in "Stage 2" required "tight force" to be suppressed. Knee orthosis for knee osteoarthritis were found to have the potential to inhibit lateral thrust.

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Section: Discussionmentioning

confidence: 99%

Effect of Knee Orthosis on Lateral Thrust in Patients with Knee Osteoarthritis

Yamamoto¹,

Endo²,

Wada³

2022

Adv. sci. technol. eng. syst. j.

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“…The effect of symptom reduction on knee osteoarthritis (Steven et al, 2004), and the postural balance in patients with knee osteoarthritis (Hassan et al, 2002;Chuang et al, 2007) were evaluated using a knee joint supporter. Moreover, the gait and electromyography in sit-tostand patterns (Abe et al, 2010) as well as three-dimensional video graphic and ground reaction force in a stop-jump task (Hayata et al, 2014) were measured in order to evaluate the effects of the knee joint supporter.…”

Section: Introductionmentioning

confidence: 99%

<b>The Effect of Local Pressure to the Knees on the Physiological and </b><b>Psychological Responses of the Human Body </b>

Dempoya

Tamura

Koshiba

2015

JHES

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The effect of local pressure to the knees on the physiological and psychological responses in the standing position and during light exercise were examined in this study in order to obtain data to design compression garments, such as elastic stockings, tights and knee supporters. Eight healthy women had cuff pressure applied to the knees at 0 mmHg, 10 mmHg, 20 mmHg, 30 mmHg and 40 mmHg, respectively for 20 minutes in a standing position. They then completed a 20-minute stepping exercise, followed by 10 minutes in a standing position under the same pressure conditions. The medial gastrocnemius muscle oxygenation (oxygenated blood volume in tissue [Oxy-Hb], deoxygenated blood volume in tissue [Deoxy-Hb], total blood volume in tissue [Total-Hb] and Oxygen Saturation [StO 2 ]), the skin blood flow and the skin temperature on the thigh, leg and toe, as well as pressure sensation and swelling sensation were measured.The results showed that every physiological measurement was affected significantly by the change of posture and exercise. This is thought to be due to the change in the hydrostatic pressure in the lower extremities. The significant changes from standing to stepping are believed to be due to venous blood returning to the heart with the muscle pumping action in stepping.Concerning the effects of local pressure intensity level on the knee on the medial gastrocnemius muscle oxygenation in the standing position, Deoxy-Hb increased, and StO 2 decreased significantly when a pressure of 40 mmHg was applied. These differences were greater than those reported by Dempoya et al. (2014) when 15 mmHg of pressure was applied to the knee in the supine position. The results suggested that the pressure levels of the compression garments should be different for night (lying) and for daily use (standing).Both the skin blood flow in the toe and the skin temperature in the thigh decreased significantly at more than 20 mmHg which was lower than the 40 mmHg obtained in muscle oxygenation due to the difference of depth from the skin surface.The pressure sensation increased significantly with pressure intensity, and the swelling sensation showed a tendency to be the lowest of all intensity levels, at 10 mmHg. In order to design compression garments for the lower extremities, high pressure more than 40 mmHg to the knees caused muscle oxygenation disorders, and more than at 20 mmHg of pressure negatively affected skin blood flow and skin temperature and caused a discomfort sensation. A low pressure of 10 mmHg to the knees can contribute to the comfort sensation without causing swelling.

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Knee joint angle sensing in healthy young adults using flexible orthosis with different wearing pressure

Yamamoto

Wada

2021

J Phys Ther Sci

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To investigate the effects of a flexible brace, by analyzing whether its usage; the difference in wearing pressure could change the joint position sensation in healthy participants; and develop a flexible knee brace for patients with knee osteoarthritis. [Participants and Methods] The study included eight healthy males with 14 knee joints (mean age, 22.0 ± 3.1 years). To measure joint position sense, an "angle reproduction test" was performed in three experimental conditions: 1) participants not wearing the brace, 2) the brace was secured with an appropriate force, and 3) the brace was fully secured using hook-and-loop fasteners.[Results] No significant difference was observed among groups comprising of those not wearing, those wearing with the standard force, and those wearing with the tight force. When the maximum hook-and-loop fastener was squeezed, the sensory error in joint position was maximized at both 30° and 60° flexion. [Conclusion] Joint position sense improvement was confirmed to be poor by orthosis, and an error occurred in the joint position sense by increasing the wearing pressure in orthosis. In future, measurements should be performed on patients with knee osteoarthritis who have decreased joint position sense and verify the effect of different wearing pressures verified.

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Effect of a wearing overlap length change of the knee joint supporter during a stop-jump task

Cited by 3 publications

References 20 publications

Effect of Knee Orthosis on Lateral Thrust in Patients with Knee Osteoarthritis

Effect of Knee Orthosis on Lateral Thrust in Patients with Knee Osteoarthritis

<b>The Effect of Local Pressure to the Knees on the Physiological and </b><b>Psychological Responses of the Human Body </b>

Knee joint angle sensing in healthy young adults using flexible orthosis with different wearing pressure

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