To improve your fitness, you should review your current exercise routines.

If you always do the same workout, change either the exercise or the intensity to avoid a plateau. For example, if you usually power walk, add in a bit of jogging to increase the intensity. If you usually do step, try a boxing class. Expand your group fitness routine library and DVD
Keep yourself motivated by trying new group activities and fitness classes. Try taking on something you've never done before. Consider taking a boxing class or learning yoga. Maybe you've always wanted to ballroom dance. Give it a try, you can never have too many ways to keep your body moving and active.
Try different types of fitness classes to keep yourself excited and motivated. Switching things up will allow you a chance to discover classes you love and give you reason to keep heading back to the gym. Give a yoga class a try or dancing. Consider taking a boot camp or kickboxing class. Remember you only have to try each class once, and you'll be losing weight along the way.
If you want to improve your fitness, give boxing a try. It involves more muscles than the average aerobic activity and is a powerful workout. The punching motions develop a strong core while sculpting well-defined arms and shoulders. Sparring will also get your heart rate up and give you a full body workout.
A really good way to get fit is to join a boxing gym. Boxers are some of the most fit athletes in the world and by joining a boxing gym, you'll have access to all of the resources they have. Hitting a speed bag is just one of the things you can do.
To improve your fitness, you should review your current exercise routines. If you always do the same workout, change either the exercise or the intensity to avoid a plateau. For example, if you usually power walk, add in a bit of jogging to increase the intensity. If you usually do step, try a boxing class.