Terri Fox Fitness Fitness over 40 is different from the bodies of 20. Terri Fox Fitness Fitness Center thrives on the individualization within the group. Every person over 40 usually has difficulties in some joints, low back pain and other issues that must be handled. As a fitness instructor over 40, and a special education teacher for 20 years that has worked extensively with physical and occupational therapists, Terri has the knowledge to strengthen the areas that currently are weak. Fitness over 40 requires a more personal training approach without the high cost of personal training. You get the best of both worlds once you enter the fitness studio.