Answer
Orthopedic doctors and physiotherapists use a simple test (Matthias posture test) to detect incorrect posture.
In doing so, the child raises his arm forward with his eyes closed and stays that way for half a minute.
If the toddler can maintain posture throughout this time and does not lean out, it indicates that he’s back, abdominal, and neck muscles sufficiently developed.
If the upper body is tilted backward, the shoulders pushed forward, and the pelvis also leaned forward, which is a sign of neglect.
In severe cases, the child can no longer take the starting position.