These exercises are meant to make muscles, joints and ligaments adapt for asana practice.
The exercises include-
Side stretch
Twist and Bend
Side Bend
Forward and Backward Bending
Sitting forward bending
lying twist for spine
Prone spinal stretch and twist in Bhujangasana
Shalabha Stretch
Dhanura Stretch
Leg splits side-front forward backwards and many more!
Stretching exercises reduce chances of injury while performing asanas and Surya Namaskar.
These are vital in toning the body by isometric stimulations to the muscles.