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.
Methods to Heal a Pulled Muscle. Apply an Ice Pack. When the person encountered the pulled muscle, immediately the region swells. The swollen part can be soothened by applying an ice pack on the area. Instead of using ice directly on the swollen region, it is always safe to keep ice pack or cold pack.