How to tell if your workouts are vigorous enough

What does "vigorous physical activity" really mean? To hit the right amount weekly, you need to know when you're pushing hard enough. Get more healthy living tips from the Mayo Clinic App:

Mayo Clinic,Health Care (Issue),Healthcare Science (Field Of Study),how can I tell if my workout is hard enough,signs of a good workout,am I working out hard enough,how do I know if my workout is working,healthy living,fitness,HIIT,