Whats the actual science behind the claim that diaphragmatic breathing is essential for zone 2 training, and is it really as effective as everyone makes it out to be? Ive seen countless coaches and trainers advocate for belly breathing as the key to unlocking efficient oxygenation, but Ive yet to come across a study that definitively proves its superiority over chest breathing.
Isnt it possible that the benefits of diaphragmatic breathing are at least partially due to the concurrent relaxation of the upper body, rather than the specific mechanics of breathing itself? After all, when youre breathing with your diaphragm, you tend to relax your shoulders and open up your chest, which can in turn improve your overall aerodynamics and reduce energy expenditure.
And what about the role of nasal versus mouth breathing in zone 2 training? Ive heard some arguments that nasal breathing is more efficient due to the increased nitric oxide production, but Ive also seen studies suggesting that mouth breathing can be just as effective, if not more so, at high intensities.
Can we really say that theres a one-size-fits-all approach to breathing in zone 2, or are we just perpetuating a myth thats been passed down through the cycling community? Shouldnt we be focusing on individualized breathing strategies that take into account factors like respiratory rate, tidal volume, and overall physiological response to exercise?