Book (Practical) Sports and physical education Relax and stretch your neck, shoulders and lower back to relieve all the fatigue from sitting work! Gymnastics

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Sports and Physical Education
Eye fatigue, heavy neck, stiff shoulders, stiff back, pain in lower back, etc. Why do you feel "tired" when you are just sitting? "Stretch based on human anatomy" removes body fatigue from the core! Makes your neck, shoulders and lower back easy! 27 methods highly praised by 150000 people. Can be used anywhere such as desk, elevator, toilet, etc. It works quickly!