Weight is the relative mass of a person which gives rise to a downward force. The mass or quantity of matter is the sum total of the body and relative force acting on the body is the force of gravity. Movement of the body is generally against the force of gravity and requires energy. A person with more mass has more weight and has to spend extra energy for every movement. The total energy expenditure is directly proportional to the body mass index of the person. A person having normal body mass index (BMI) spends normal energy on his daily activities. The extra energy in the body can be utilized to excel the performance level of the person. The ability of the body to expend this extra energy and to assist in increasing the performance level is the endurance of a person. Endurance is the ability of the body to exert itself physically and mentally. However, a person with more than normal BMI uses the extra energy to move against the force of gravity which decreases the ability of movement. The endurance level of the overweight person decreases considerably.
The endurance quotient of a person depends a lot on the weight of a person and has an inverse proportion to weight. Better endurance implies better movement and increased performance levels. Weight loss is necessary for a person to have better endurance and achieve his best in any activity. Certain weight loss treatments like Xenical UK are effective treatments to lose weight and achieve a better body mass index to reach peak performance.