If patients get up in the morning with weak legs and weakness, it may be due to excessive fatigue, anemia, osteoporosis, as follows: 1, excessive fatigue: some patients have such symptoms due to excessive fatigue, for example, usually do not often participate in physical exercise, suddenly carried out some heavy physical activities or labor, may be after rest, there is a large amount of lactic acid deposition in the lower limbs, lower back muscles 2, anemia, hypoglycemia: some patients have such symptoms due to severe anemia or hypoglycemia, commonly due to the presence of long-term malnutrition, long-term hunger, so that the patient in the process of getting up appears sore, weak. 3, osteoporosis: some patients have such symptoms due to osteoporosis.