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.
Items You'll Need. 1  Ice pack. 2  Heat pack. 3  Heating pad.  Pain 1  medication. Avoid activities that use the pulled muscle.  Rest in bed for two to three days and keep activities to a 1  minimum. Apply ice packs or heat packs to the sore 2  area. Take an over-the-counter pain reliever if your doctor does not prescribe medication.