In group A, PNF based gait training (15 minutes) and conventional physical therapy (45 minutes) will be performed.

PNF exercises involved PNF pelvic patterns (pelvic interior elevation and posterior depression), PNF lower extremity D1 Flexion and PNF lower extremity D1 extension (Unilateral during 1st to 3rd week and bilateral from 4th week onwards). Exercises will progress from rhythmic initiation and then progress to slow reversal and agonistic reversal up to 6th week of therapy and continues until 12th week. Each exercise will be repeated for 10 to 20 times.

Conventional physiotherapy will be administered according to the European Physiotherapy guidelines for Parkinson's disease.

Other exercises include:

1. Range of motion exercises
2. Stretching exercises
3. Upper and lower limb strengthening exercises

Conventional physical therapy (45 minute session) will be performed in group B.Conventional physiotherapy will be administered according to the European Physiotherapy guidelines for Parkinson disease.

Other exercises include:

1. Range of motion exercises
2. Stretching exercises
3. Upper and lower limb strengthening exercises

Proprioceptive Neuromuscular Facilitation (PNF) is a more advanced form of flexibility training, which involves both the stretching and contracting of the muscle group being targeted. PNF stretching is one of the most effective forms of stretching for improving flexibility and increasing range of motion.

It is used to objectively determine a patient's ability or inability to safely balance during a series of predetermined tasks. It consist of a 14 item list with each item consisting of a five-point ordinal scale ranging from 0 to 4.0 denotes inability to complete the item, and 4 the ability to accomplish the task. Scores of less than 45 out of 56 are accepted as indicative of balance disorders in the elderly.

It is used to assess freezing of gait severity in patients with Parkinson's disease. It consists of a 6-item questionnaire. A 5-point scale is used to mark scores. Zero (absence of symptoms) to 4 (most severe), is used for each item to rank severity of symptoms.

It is used to assess the ability of patients to do activities of daily living. It consist of 18-item, clinician-reported scale that assesses function in six areas including self-care, continence, mobility, transfers, communication, and cognition. Total score for FIM will be a value between 18 and 126. Higher the score, more independent the patient is.