Backpack overload in children: Low back pain unrelated to injury or other known cause is unusual in pre-teen children. However, a backpack overloaded with schoolbooks and supplies can strain the back and cause muscle fatigue. The American Academy of Orthopaedic Surgeons recommends that a child’s backpack should weigh no more than 15 to 20 percent of the child’s body weight.
Before discussing different strength and mobility exercises, we should first look at activation exercises for your Gluteus Maximus (referred to as the glutes) muscles. The reason for needing to activate your glutes is simple—as a population, we spend way too much time sitting, and as a result, what happens is what noted spinal researcher Stuart McGill terms gluteal amnesia—your glute muscles can "go to sleep" and not function properly.
Some of these red flags are much less red than others, especially depending on the circumstances. For instance, “weight loss” is common and often the sign of successful diet! (Well, at least temporarily successful, anyway. 😃) Obviously, if you know of a harmless reason why you have a red flag symptom, it isn’t really a red flag (duh!). But every single actual red flag — in combination with severe low back pain that’s been going on for several weeks — is definitely a good reason to get yourself checked out.