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Knee Joint

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...

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Updated: Mar 9, 2026

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

Published on: July 22, 2019

[Physical activity for knee osteoarthritis.]

Masashi Nagao¹, Muneaki Ishijima¹, Haruka Kaneko¹

¹Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan.

Clinical Calcium

|December 27, 2016

Summary

Knee osteoarthritis (OA) affects millions of older adults. While high-impact sports may increase OA risk, moderate exercise and physical therapy can be beneficial for knee health and recovery.

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Area of Science:

Gerontology
Orthopedics
Sports Medicine

Background:

Japan's aging population faces a high prevalence of knee osteoarthritis (OA), with an estimated 24 million affected.
Growing interest in sports participation among diverse populations necessitates understanding the relationship between physical activity and knee health.
Reduced knee extension muscle strength is an identified risk factor for developing knee OA.

Purpose of the Study:

To review current literature on the efficacy of physical therapy for knee OA.
To discuss the benefits and risks of sports activities for individuals with knee OA, particularly after surgery.
To provide insights into managing knee OA in an aging population with increasing sports engagement.

Main Methods:

Literature review of recent studies on knee osteoarthritis.
Analysis of epidemiological data regarding risk factors for knee OA.
Discussion of physical therapy interventions and post-operative sports participation.

Main Results:

Excessive high-impact sports are associated with an increased risk of knee OA.
Daily life exercises may decrease the risk of knee OA.
Physical therapy and tailored sports activities show potential benefits for knee OA management and post-surgical recovery.

Conclusions:

Understanding the nuances of sports participation is crucial for preventing and managing knee OA in older adults.
Physical therapy plays a significant role in improving outcomes for knee OA patients.
Careful consideration of activity type and intensity is recommended for individuals with knee OA, especially post-surgery.