1. Spinal instability or fracture (acute or healing)
2. Severe osteoporosis or advanced bone fragility
3. Recent spinal surgery (fusion, laminectomy, disc replacement, etc.)
4. Unstable disc herniation or acute disc rupture
5. Severe cardiovascular disease (uncontrolled hypertension, aneurysm, advanced heart failure)
6. Severe glaucoma, retinal detachment, or recent eye surgery
7. Intracranial hypertension or known aneurysm
8. Uncontrolled vertigo, inner ear disorders, or severe balance dysfunction
9. Active deep vein thrombosis (DVT) or history of pulmonary embolism
10. Pregnancy (especially 2nd and 3rd trimester)
11. Active infection, tumor, or cancer in the spine or brain
12. Severe obesity exceeding the machine’s rated capacity (weight limit)
13. Open wounds, unhealed fractures, or recent traumatic injury
14. Active seizure disorder uncontrolled by medication