Mo Jingchun, who was running while listening to music with headphones on, hadn't run for long before his right side started to hurt badly, possibly because he hadn't run in a while.
"Zero, why is my right side hurting?"
As soon as Mo Jingchun finished speaking, Zero said through the Bluetooth headset:
"Boss, I advise you not to talk while running, or else the pain in your side will worsen."
"Experts explain that pain in your side while running is related to spasms of the respiratory muscles.
The diaphragm and intercostal muscles are two types of respiratory muscles. If the diaphragm spasms, it can cause pain in the upper abdomen or the left/right upper abdomen.
