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.
1 Tendons require weeks of additional rest to heal. 2  You may need to make long-term changes in the types of activities you do or how you do them. 3  Apply ice or cold packs as soon as you notice pain and tenderness in your muscles or near a joint. 4  Apply ice 10 to 15 minutes at a time, as often as twice an hour, for 72 hours.