Get into Hiking-Specific Shape
Even if you work out on a regular basis, hiking requires specific aspects of fitness. You will need both aerobic and muscular endurance. Some people train for hiking by using a treadmill on an incline, while wearing a backpack. Speaking of backs, ask a trainer to devise a good program for the muscles of your upper back. If these muscles are weak, your posture will be compromised, which will lead to fatigue. Balance and core exercises are extremely important. If you've ever had to cross a stream by walking over a line of rocks, you understand the importance of balance. Be sure to perform exercises for ankle stability, such as balance board and Bosu ball exercises.
A map, a compass and possibly a GPS are essential. If possible, get and learn to read a topographic map. If the terrain you are hiking differs from the terrain on the map, you'll know that you have hiked in the wrong direction.
You will need plenty of water, as well as a means to purify it. Camping stores sell hiking-specific water bladders, as well as water-purifying filters and tablets. Never drink water directly from a stream. It may be carrying dangerous bacteria.
Your running or aerobic shoes are not suitable for hiking. You need waterproof, hiking-specific shoes, which have good ankle support. If you buy new shoes, break them in before you hike. Use padded, hiking socks. If you have a history of blisters, apply second skin to your feet prior to hiking.
While some people hike in shorts in warm weather, it might make you more susceptible to sunburn and insect bites. Many camping stores make lightweight, full-length pants, which are suitable for hiking. Make sure to pack rain gear and extra socks, in case of a downpour.
Sunscreen and Insect Repellent
Sunburn and insect bites can put a damper on your hiking pleasure. Make sure to bring them along. However, you don't want those chemicals on your hands when you eat. Bring a small bottle of antibacterial hand wash.
Bring along high-carbohydrate, high-energy snacks. Avoid bringing food that might spoil.
If you are planning to go to a high altitude area, spend a day at a lower altitude to acclimate.