Having core strength along with having your whole body toned will leave you feeling strong and solid. Core strength makes a person better at all sports at any age. It makes your workouts more fun and you gain core strength while strengthening the whole body. You will burn more calories before and after your work outs and you will burn more calories sustaining the muscles. A strong core will allow you to keep optimal body alignment for whatever you’re doing (swim, bike or run), and this in turn will reduce your fatigue in the long run.