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Where are you located, KP? From your descriptions of your hikes, it sounds like you're in Scandinavia or somewhere else in the high latitudes..You must be in great shape, with all of your cardio work. Have you considered mixing in any resistance (weight) training? Or maybe you do that already- I just don't remember you talking about any weight training in your journal. I've found it to be beneficial, not only for muscle strength and tone, but I do my weight workouts with enough intensity and fast enough pace to give me some cardio training as well.