Hello, I am a civil engineer and basically my work is to supervise the working on site for 10-12 hours a day and have to keep walking for this duration. Last few days have been very hectic and I am feeling weakness and pain in the muscles of my legs, near around calf muscles and foot. Please suggest some good medicines or any multivitamin. Other than this I have no problem regarding my health and these are only due to heavy work pressure. Thanks!