Final answer:
Peripheral artery disease (PAD) is the subject of this question. It causes pain or cramping in the lower extremities, usually the calf muscle, after walking a specific distance, which resolves when standing.
Step-by-step explanation:
The subject of this question is peripheral artery disease (PAD). PAD is the narrowing of peripheral arteries, usually in the legs, due to atherosclerosis, which generally causes intermittent pain in the legs when walking.
This symptom is known as intermittent claudication, where individuals experience pain, cramping, or both of the lower extremity, usually in the calf muscle, after walking a specific distance.
However, the pain resolves for a specific amount of time while standing, until the individual resumes walking.