04 Jan 2014 Exercise is a structured way of providing a stimulus to the body in order to improve mobility, increase strength and endurance, decrease disease risk and improve overall wellness. The threshold of what constitutes exercise differs from person to person and depends on factors such as fitness level, age, weight, health and strength. What one person considers grueling might be a warm-up for someone else. Regardless of fitness level, the only way to improve is to continuously push yourself. Exercise increases the workload the body is capable of handling. As strength and endurance go up, the body becomes accustomed to a constant workload; what was once sufficient is no longer enough to cause gains. To see improvements in physique, performance and health, you need to constantly increase intensity.