Im not expert, but isn't it the diaphragm and rib muscles, the muscles between the ribs, internal and external intercostals.
Your breathing speeds up when you exercise in order to get oxygen to your muscles and heart.
These are diaphragm and externa intercostal muscles in quiet breathing and sternocliedomastoid ,sclene muscles,anterior serrati in heavy breathing
diaphragm
Myopathy of the breathing muscles is serious as there may be serious breathing difficulties and increased risk for pneumonia, flu, and other respiratory infections.
First of all, it matters what type of MD you have, but generally since the disease weakens your muscles to the diaphragm, intercostal muscles and other muscles involved in breathing begin to die, and make breathing harder and harder.
Eric is breathing heavily what ATP harvesting pathway have his working muscles been using that leads to such a breathing pattern?
For relaxed breathing, called tidal breathing, all you need is the diaphragm muscle.
(My guess is that) When you're running your muscles have to work harder, so the muscles in your heart start to work faster & pumping more blood. But you're breathing isn't exactly a muscle so you start to breathe harder trying to catch up with the rest of your body.
The diaphragm, the external intercostal and the interchondral portion of the internal intercostal muscles are the main muscles that control breathing. Other muscles are sometimes used, but only if the person has a breathing disorder or if the body needs energy very quickly.
Involuntary muscles control functions like breathing and digestion.
The intercostal muscles lie between the ribs. When you exhale, these muscles contract, and in conjunction with the abdominal muscles, the lungs contract and air is forced up via a positive pressure gradient.
intercostal muscles