rectus abdominis strain

Why do my stomach muscles feel sore as if bruised after an intense laugh?

1. Introduction Feeling a bruised, sore sensation in the stomach muscles after an intense bout of laughing is caused by structural micro-trauma, mechanical fatigue, and the rapid, uncoordinated contraction of the rectus abdominis and diaphragm. Laughter is not merely an emotional response; it is a highly demanding, involuntary physical event. During a heavy laughing fit, … Read more

Why do my stomach muscles feel sore as if bruised after coughing for days?

1. Introduction Sore, bruised-feeling stomach muscles after days of persistent coughing are caused by the relentless, forceful isometric and concentric contractions of the abdominal wall. A cough is an explosive respiratory reflex that demands intense mechanical effort from the core musculature to generate high intra-abdominal pressure. Over several days, this repetitive mechanical stress rapidly depletes … Read more