10 Best Equipment Free Workouts to Lose Weight at Home A lot of us don’t get the kind of day-to-day physical activity we actually need, and so we are physically “unfit.” “Physical activity” is described as any movement of the body that is mainly made by skeletal muscles – and requires sufficient energy to accomplish. “Physical fitness” refers to the ability of a person to do physical activities. Physical fitness can be measured by determining the power, endurance, and flexibility. Body fitness exercises at home help increase the physical ability of a person. A balanced diet also plays an important role in weight loss. There are several diet plans to lose weight and stay fit and amongst them 7-day diet plan is one of the most renowned ones.