Breathing in through your nose, even with increased resistance, can bring more oxygen into your system as it allows muscles to contract and create more room for your lungs to fill with air. Different modes of breathing, such as diaphragmatic breathing, can still aid in bringing enough oxygen into your system.
Podcast host explains the various muscles and nerves involved in the mechanics of breathing, including the diaphragm and intercostal muscles, and how they work together to bring oxygen in and expel carbon dioxide from the body.
Breathing in through your nose may allow you to bring more oxygen into your system because of the increased resistance, which enables you to draw more force into your breathing apparatus and bring more air into your lungs.