hi i am wondering if you can help me. i have agreed to attempt the 3 peak challenge (climb to highest peak in england, scotland and wales in 24hours). the problem is i am quite unfit. im 23 and havent done regular exercise for 7 years. i weigh 8 and a half stone so its not that i carry alot of weight tho, but i smoke. im realy determined to do this as its for a good charity charity. does anyone have any tips, particular exercises etc for me. or does anyone think i am pushing it too much as im not realy sure what ive got myself into! cheers