Effects of exercise on physical limitations and fatigue in rheumatic diseases

Figure 2 Macroscopic and microscopic signs of osteoarthritis knee hyaline cartilage. A: The microscopic observations of osteoarthritis knee hyaline cartilage showed structural alterations, reduction of cartilage thickness of the cartilage zones and subchondral bone fibrillations; B: The microscopic observations of healthy knee hyaline cartilage showed a preserved morphological structure with no sign of cartilage degradation.