Usually, if there is weight loss but the fat rate rises, the following factors are common: 1, the body’s muscle atrophy or muscle distribution rate is reduced, the weight of muscle in the same volume is much more than the weight of fat; 2, if the weight loss but the fat rate rises can only represent the body’s muscle rate decline, there will be the following pathological factors: 1, long-term inactivity will lead to muscle atrophy; 2, chronic nutrition Inadequate state, such as chronic tumor, long-term anemia, long-term cachexia state will lead to muscle atrophy in the body; 3, after major surgery, post-operative can not exercise when there will be lower limb muscle atrophy and other conditions, will lead to weight loss but fat rate rise.