How to use the breath in different poses:

• Opening or lifting the chest e.g. bhujangasana – inhale. A good opportunity to inhale more deeply.
• Forward bends e.g. forward fold – exhale. Exhaling allows the top half of the body to meet the lower half as there is less mass in the way when the lungs are emptied.
• Twists e.g. parivtta trikonosana (revolved triangle) – inhale as you sit or stand tall and extend the spine and exhale on the actual twist. This allows the rib cage to twist further.

In Sun Salutation: 

Urdhva Hastasana (inhale)

Padangusthasana (exhale)

(inhale hands down, exhale feet back)

Bhujangasana (inhale, hissing exhale)

(inhale) Adho Mukha Svanasana (exhale and inhale whilst in pose)

(exhale as feet come forward)

Padangusthasana (inhale chest up and exhale as fold forward and hold toes)

Urdhva Hastasana (inhale)

Tadasana (exhale)