Running isn't just an effective form of exercise, it's cost-efficient (you need nothing more than a good pair of shoes), you can do it anywhere and it's an excellent way to work through life's little stressors. If running is your exercise of choice, you may want to fuel yourself with these four foods, recommended by running coach Jenny Hadfield:

• Almonds. The vitamin E in almonds helps to prevent achy muscles. Grab a small handful for a snack -- but watch your portion sizes. Even though almonds are rich in healthy fats, they still pack quite a few calories.
• Oranges. Vitamin C helps repair muscle damage caused by running.
  
• Sweet potatoes. A great source of healthy carbs, sweet potatoes are rich in potassium and magnesium -- minerals that runners lose through sweat.
• Tuna. Serious runners need 60-90 grams of protein a day to help repair muscle. Tuna is a convenient and lean source of protein.