One of the situations that happen whenever you are performing any cardio activity is that body heat is generated. And when body heat is generated, your blood pressure rises as well. This results throughout the length of your activity. When you are also performing these activities, your blood pressure will lead to a rise.
The FDA food code says that restaurant should cook ground beef to 155f for 15 sec. but the CDC and the USDA say that consumer should cook ground beef to 160f