Cardiovascular training is a must. You will be hiking approximately 8 miles roundtrip for 7+ hours on uneven terrain. Cardiovascular training will increase your endurance making for a more pleasant experience on the trail. In addition, get yourself out on a hike and choose trails that are uneven. We oftentimes get people who are in good physical condition (i.e. train at the gym daily, run several times a week), but struggle on the uneven surface because they are used to exercising on flat ground, which does not require much balancing and much use of the small muscles in the legs and ankles.