Hiking chick, eh? Maybe the true source of "will power" is staring you in the face. I cut my teeth on trails. Then got swept up in the whirlwind of the '60's - my body became a guinea pig for every new sensation. Then I remember a hike in Yosemite - at every switchback I had to stop & catch my breath - and smoke a cigarette. Somewhere on that hike I had an epiphany - I realized I was forfeiting something I really loved for something that I knew had a dead end. I tossed the cigarettes (not on the trail

and never turned on again. That was over 43 years ago.
Just a few months ago I climbed Mt. Dana. Doubtful I'd even be alive if I'd kept buzzing much less been able to climb a 13,000 ft mountain in the Sierra Nevada. It is a rare occasion I'll have a beer - not about to form a beer belly. Just keep telling yourself what is worth more - that high or hitting a trail that will take you the real high...