Hi all, recently I did a VO2 Max workout (4x4’s), and I experimented with sucking in air forcibly and blowing it out pretty hard on each breath during the last part of the intervals. This made my breathing a little slower and deeper. It did not feel natural and it was an effort, but it felt kind of like turbo-charging my lungs. I could only do it for 2 minutes of the intervals before my respiratory muscles (?) tired too much. But during those 2 minutes I saw my heart rate go down 2 beats and my power go up 5 watts. That is pretty significant just from breathing.
This made me wonder if I could improve performance by doing some respiratory training with an affordable tool. I know there are several available tools including Airofit, Breather Fit, and more. I would appreciate hearing your thoughts about respiratory training in general, and specific tools. I remember there was a Fast Talk Labs podcast episode about this, but if I remember right the evidence that it works was mixed. Thanks for your thoughts.