Longer daylight hours and warmer evenings signal the start of that ever-popular after-work activity: Softball. If you want to be the star of your company team, you don't necessarily have to hit the batting cages -- but you should start some general fitness training. Focusing on your body's core muscles -- found in the abdominal, lower back and pelvic area -- is an excellent way to start.

In terms of your softball prowess, strengthening your core can help you swing with more power and run the bases with more speed and agility. You'll also improve your balance in ways that can enhance your athletic performance in any sport.

Two good ways to build core strength include Pilates and exercises with stability balls.