. . . "This will decrease stress on all your muscles, including your quadriceps.Warm up and stretch before vigorous activity.RESOURCES:American Council on Exercisehttp://www.acefitness.orgFamily Doctor???American Academy of Family Physicianshttp://familydoctor.orgCANADIAN RESOURCES:The College of Family Physicians of Canadahttp://www.cfpc.caCanadian Physiotherapy Associationhttp://www.physiotherapy.caRef" .