Yoga and walking are both exercise. Any form of aerobic exercise will increase oxygen availability. Elite, and dedicated amateur, athletes will develop specifi

Yoga and walking are both exercise. Any form of aerobic exercise will increase oxygen availability. Elite, and dedicated amateur, athletes will develop specific breathing routines to increase O2 availability in support of increasing their VO2 Max but even for sedentary (so, typical) adults practically any form of mindful breathing coupled with higher-than-typical physical exertion will increase oxygen availability. Their breathing routines not coincidentally almost always mirror some kind of yogic breathing technique. Yogic breathing in hypobaric environment: breathing exercising and its effect on hypobaric hypoxemia and heart rate at 3,650-m elevation https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8413908/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8413908/ Effects of Slow Deep Breathing at High Altitude on Oxygen Saturation, Pulmonary and Systemic Hemodynamics https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495772/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3495772/ When you meditate or do yoga asanas (poses) with a focus on your pranayama (breathing) as a matter of routine for long enough you subconsciously start performing yogic breathing all of the time. Walking is just irrefutably, no-citation-needed, good for you.