Surya Namaskara B (Vinyasa B series) is an extension of the A series sun salutation (warm-up), the additions are Virabhadrasana I (Warrior I) on both left and right sides and Uttanasana (chair pose).

Vinyasa sequences are part of the ancient Hatha tradition used to warm up the body and prepare for the practice, incorporating breath with every movement.  These sequences can also be used to wake the body up in the morning or warm up  before a workout.