Life starts to get interesting at 40. Probably, the burdens of parenting are easing up, and you are at a stable point in life. When it comes to fitness, no one is too old to exercise. The fitness arena is full of fitness enthusiasts who are over 40 years old and still using legal fitness gear like TB-500 to stay in good shape. If you have just started your journey through your 40s, there is a lot you can do to maintain fitness. However, this will call for a better plan since it is a long-term strategy to remain fit and boost your health.