The home ministry on Friday issued an 18 point health advisory for the Amarnath Yatra pilgrims which also suggests that those having difficulty in breathing carry portable oxygen along. The advisory which carries 14 do's and four don'ts advised the pilgrims to achieve physical fitness before starting Amarnath Yatra with a preparatory morning and evening walk of about 4-5 kilometre every day from a month prior to the pilgrimage.Planning to start a morning walk? Here's all you need to know about walking correctly. The advisory warns that the Amarnath Yatra involves trekking at altitudes as high as 14000 feet which