A 36-year-old auto mechanic presents to the emergency department after hurting his back on the job. While lifting an object, he experienced sudden pain in his lower back with radiation to the right buttock. He was initially treated for muscle strain with a nonsteroidal anti-inflammatory drug (NSAID) after x-rays of his lumbosacral spine demonstrated no pathology. He continued to complain of this low back pain now radiating posteriorly down his left leg to the mid-thigh. Physical examination is unremarkable. The most likely diagnosis is

Lumbosacral strain

Explanation:

Lumbosacral strain refers to an injury which leads to low back pain. It should be noted that strain simply means the tearing of the tendons or muscles.

Lumbosacral strain can be caused when a person stands or sits in the same position for a long period of time. It can also be caused by poor posture, accidents or fall.

The symptoms include pain in the back, inability to freely move, and swelling of affected part.

Common treatments include cold or heat packs, stretching exercises, prescription of medicines such as nonsteroidal anti-inflammatory drugs in order to reduce inflammation, and swelling.

answer: the answer is d.

explanation: this is because when you exercise you make your muscle produce a certain liquid, that does not evaporate it.   also when you exercise you do not reduce muscle fiber.   and it does not really control your twitch that much.