Stock market crash. A stock market crash is a sudden dramatic decline of stock prices across a significant cross-section of a stock market, resulting in a significant loss of paper wealth. Crashes are driven by panic as much as by underlying economic factors. They often follow speculative stock market bubbles.
Arthrofibrosis. A build-up of scar tissue in the joint causing restricted movement. âArthroâ means joint, and âfibrosisâ means scarring. Arthrofibrosis usually occurs when there has been excessive scarring on the soft tissue or ligaments and tendons in the joint.rthrofibrosis. A build-up of scar tissue in the joint causing restricted movement. âArthroâ means joint, and âfibrosisâ means scarring. Arthrofibrosis usually occurs when there has been excessive scarring on the soft tissue or ligaments and tendons in the joint.
The claim: Allowing your knees to move too far forward during exercises such as the squat and lunge places dangerous shearing forces on your knee ligaments. The origin: A 1978 study at Duke University found that keeping the lower leg as vertical as possible during the squat reduced shearing forces on the knee.