Xray of spine is needed. Propbably suffered an osteoporotic vertebral collapse.

Posture is due to Osteoporosis induced kyphosis (bending of spine). Early treatment - early recovery.

Kyphoscoliosis

Probably osteoporosis induced kyphosis (Forward bending of spine). Treatment involves a osteoporosis treatment , vitamin d and calcium supplementation, bracing etc

It could be due to kyphosis ( forward bending of spine) There are various reasons for kyphosis. Through examination is required

A forward-bent posture with inability to stand or walk straight is commonly due to age-related spinal degeneration, osteoporosis with vertebral collapse, or weak back and hip muscles chronic back pain and nerve compression can further worsen posture and balance such symptoms should be evaluated with a clinical examination and spine X-ray, and sometimes MRI if needed treatment usually focuses on pain control, posture-correction exercises, and muscle strengthening calcium and vitamin D supplementation and use of a walking aid may be advised early assessment is important to reduce fall risk and prevent further progression.