Shortness of Breath
Credit: Corey Jenkins / Getty Images

Being out of breath during exercise is standard but this common characteristic of working out can also indicate when you're overdoing it. "When you take a break or pause, your panting should slow down within 60 seconds," says Kaeding. In most cases, being unable to catch your breath means you pushed yourself too hard. If you're experiencing additional symptoms – worsening shortness of breath, swelling in your feet and ankles, high fever, cough, and chills, blue lips or fingertips, or wheezing – you may want to consult with your doctor as these could be signs of a heart attack or pulmonary embolism.