Participants will receive a supervised physical therapy program including: mobilizing exercises, stretching exercises, and strengthening exercises. 3 sessions a week for eight consecutive weeks.

Patients at the control group will receive instruction for home based exercise program of physical therapy exercise. The home program primarily consisted of exercises targeting deficits in joint ROM, muscle flexibility and strength, and balance. The home-based program will include stretching, ROM and strengthening exercises

1. Mobilization Techniques :

   The joint mobilization technique will be the anterior-posterior glide of the talus. The participant will be positioned in supine or long sitting.

2. Stretching Exercise:

   Passive stretching with therapist assistance was used for ankle dorsiflexion with the knee both flexed and extended. Force during passive stretching was modified to patient tolerance. Each participant flexed the knee slightly while standing on a 10° incline board. The participant was asked to slightly flex both knees until a stretch was felt in the calf muscle.

3. Strengthening Exercise:

The resistance training protocol will be based on the progressive resistance training principle and was a modification of the protocol used by Frontera et al [10] in older men. Plantar-flexion resistance training will be performed on a customized hydraulic apparatus, which provide a constant resistance over the entire ROM and allow for concentric as well as eccentric.

Electromyogram (EMG) is the recording of the muscle activity and in this study EMG will be recorded from the tibialis anterior (TA) and the triceps surae muscle groups: medial gastrocnemius (MG), lateral gastrocnemius (LG) and soleus (SOL). Myomonitor 4 (Delsys, Boston) EMG data acquisition system was used. This has a gain of 1000, CMRR of 92 dB and bandwidth of 20-450 Hz, and 12 dB/octave roll-off. The sampling rate was 1000 Hz with a resolution of 16 bits/sample. Delsys single-channel active differential silver bar (10 mm x 1 mm) were used to record EMG. These will be embedded preamplifiers and fixed inter-electrode distance of 10 mm.

Dynamic plantar pressure was recorded using a single BTS P-WALK pressure platform (BTS Bioengineering S.p.A. Italy), with dimensions 640 mm _ 740 mm _ 8 mm and an acquisition frequency of 250 Hz. Data transmission to the computer is via USB2, where specific software (BTS G-Studio) processes the information received. The software itself identifies each step performed, and in the processing, the researchers themselves (M.F.-G. and D.S.-G.) take care of eliminating incorrect or incomplete steps .

For data collection, the pressure platform was placed in the intermediate part (4 m) of the walkway. In this way, for step standardization, we ensured that at least three steps were taken before stepping on the plate. Five steps were collected with each limb during a continuous gait cycle. The variables recorded using the pressure platform were: weight-normalised peak plantar pressure (PPP) (kPa)-peak pressure recorded from the total number of steps taken during the gait.