The most obvious difference between training on a regular bench versus on a fitness ball is that the ball provides an unstable surface. It is this instability that the ball provides that increases the level of difficulty of the exercise being performed. When performing a seated shoulder press on a bench for example, you only have to focus on the movement itself whereas when performed on a stability ball, you are forced to balance yourself first and foremost. Then once you have established yourself, you can then begin the exercise. Then throughout the exercise you are forced to keep your core engaged to prevent you from falling over while doing the shoulder press.

Working with a fitness ball will also help you to address any inconsistencies or muscular imbalances that you may have. Over time the body can adopt bad training habits which translate into alignment issues and create imbalances between opposing muscle groups. By integrating the ball into your routine, you are then forced to keep your spine straight so as to keep your balance and maintain strict form.

Another advantage of using the stability ball is that more muscles groups are involved in the movement making for a more efficient workout. This also forces you to burn more calories during the exercise session. Using the stability ball in your routine will increase the intensity of your workout by maximizing the force and effort involved. Compared to working on a flat solid bench, your metabolism will be working at a higher level on the ball because of this making it a more to complete the same amount of exercise which will have a positive effect on your metabolism. Substituting the stability ball with your office chair is another trend growing in popularity that accomplishes this will help to burn more calories at rest.

Marc Lavender - Personal Trainer
http://www.one80.com

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