Well, short bursts of stress actually aren’t so terrible. Our bodies are wired for the classic “fight or flight” rush: heart thumping, breath speeding up, energy pouring into your muscles so you can tackle whatever’s in front of you. But the issue is when that stress refuses to fade. The American Heart Association calls this “chronic stress,” where your alarm systems keep getting triggered, over and over, day after day. That kind of unrelenting pressure pushes up your blood pressure, encourages unhealthy habits like skipping the gym, snacking late at night, or lighting up a cigarette, and keeps your body simmering in a stew of low-level inflammation.
Now, as for inflammation, in theory, it helps us heal. You get a cut or a cold, and your immune system races in to patch things up. But if that response never switches off, it quietly wears away at your arteries and organs, edging you closer to serious illness. That’s the link researchers wanted to test: Is ongoing, invisible inflammation really changing physical structures in the heart?