9-year-old dark-skinned boy in school uniform suffers from back and neck pain from carrying a heavy backpack has muscle strain

9-year-old ache america back backache backpack boy brazilian brunette carrying child childhood colombian dark-skinned discomfort disease education educational elementary ethnic exhausted expression gesture heavy hispanic hurt immigration injury joyful kid latin male medical medicine mexican muscle muscular neck pain painful peruvian position posture problem school son south strain stress suffer suffers symptom tired uniform