Spring washers, sometimes called disc springs, are a subtype of washers. They lend their mechanical capabilities to the unique profile of the material: when subject to a load, the irregularities of the washer compress with a proportionate resistance to return to their predeflected shape.
You should never stretch a pulled muscle to the point of pain or you risk re-injuring it. Do not overstretch the pulled muscles. Too much stretching can retear injured muscle fibers. Gently stretching a pulled muscle may relax the surrounding muscle fibers, which may be tight in response to the injury.
Share. To avoid injury, tendons need to be very elastic. But stretching makes them less elastic, so they are less able to deal with the large energy load placed on them by exercise. Stretching can even affect other parts of the body, too. Static stretching â where limbs are extended and held in a position for a period of time â is particularly bad. 2  Stretching loosens the muscles and tendons, making them less powerful and more prone to injury.