The purpose of this study is to assess and determine the influence of pelvic inclination on sit to stand task in stroke patients.

There is a crucial need to have a better understanding of effect of pelvic inclination on sit to stand activity and to know the important factors to be considered to improve the patients' treatment and performance. Forty five participants are recruiting to assess the pelvic tilt angles in stroke patients during sitting position and to analyze the influence of pelvic tilt angles on ability to perform sit to stand task during rising from a chair in stroke patients.

Inclusion Criteria:

• Patients' age ranged from 45-60 years old.
• Normal body weight with a body mass index (BMI) ranged from 18.5 to 24.9 kg/m2.
• Patients' had the ability to maintain sitting position without using any aids.
• Patients' had the ability to stand from sitting five times independently.
• Cooperative patients with ability to understand instructions and follow simple verbal commands.
• The duration of illness was from six months to 2 years.
• The degree of the paretic lower limb spasticity ranged between (1:1+) according to the Modified Ashworth Scale.
• The degree of the paretic lower limb weakness was not less than grade 3 according to group muscle testing.

Exclusion Criteria:

• History of previous strokes and other neurological disorders.
• Visual, auditory and vestibular deficits.
• Cognitive impairments and language deficits.
• Leg length discrepancy is more than 0.5 cm.
• Previous history of orthopedic conditions in back or lower limbs (e.g. low back pain, fractures, deformities and surgeries).

The patients were recruited from the Out-patient clinic for Neuromuscular Disorders and Its Surgery, Faculty of Physical Therapy, Cairo University and Out- patient clinic of El-kasr El-Aini Hospital, Faculty of Medicine, Cairo University