Risk of clotting increases Cardiologist Aaron Horne from Medical City North Richland Hills explained that anytime the temperature falls below 40 degrees, it’s important to be careful while exercising or even playing outdoors. "One of the main things I don't want...is for people to become couch potatoes during all of this, because inactivity is going to then increase our risk for coronary events as well," said Horne. "However, we want to definitely try to exercise (outside) when the temperature is a little bit above 40 if possible." If you do choose to spend some time outside, layer up! Keep...