The nurse should notify Tiffany that her delayed onset muscle soreness was caused by her intense physical activity which stressed the muscle tissue beyond what it is accustomed to. Tiffany drastically changed her exercise routine by enrolling in a local gym and participating in activities that her muscles unfamiliar with. Although it alarmed her, her soreness is a result of her performing activities, such as lifting weights. Every time Tiffany would straighten her arm or leg to return it to the weight bench, the isotonic contraction of her muscle was eccentric, meaning the muscle generated force as it lengthened. The reason for this soreness is still unclear, but it may be that the muscle stretching that occurs during eccentric contractions
