Final answer:
Two common postures that indicate that the patient is trying to increase air flow are lateral movement of cheeks and sleeping on one's back. These postures can help increase air flow and ensure proper oxygenation.
Step-by-step explanation:
Two common postures that indicate that the patient is trying to increase air flow are lateral movement of cheeks, such as when sucking on a straw or compressing air in the mouth while blowing, and sleeping on one's back, which can increase the risk of temporary airway blockage during sleep causing sleep apnea. These postures can help increase air flow and ensure proper oxygenation.