He couldn’t breathe properly… but the problem wasn’t just “weak lungs.” 🫁💔 It was that he didn’t understand how much air his lungs were actually capable of holding and moving. Deep inside every breath you take is a hidden system called lung volumes and lung capacities—the reason you can whisper, run, laugh, and still keep breathing without thinking. Let’s break it down simply. The lungs are not one fixed space. They are divided into volumes, each telling a different part of the breathing story. The tidal volume (TV) is the quiet one. It’s the air you breathe in and out during normal, relaxed breathing. Nothing dramatic—just life happening in the background. The inspiratory reserve volume (IRV) is the “extra push.” It’s the extra air you can inhale when you take a deep breath after a normal inhale. Like your lungs saying, “I still have more to give.” The expiratory reserve volume (ERV) is the opposite. It’s the extra air you force out after a normal exhale. That moment when you try to empty everything out—but there’s still something left. The residual volume (RV) is the silent survivor. It’s the air that always stays behind in the lungs, even after the strongest exhale. You can never fully empty your lungs—and that’s what keeps them from collapsing. Now, when these volumes combine, they form capacities—the bigger stories.
