The Risk of Injury

When we have a good arobic system, our endurance can be tested all day long. So i guess the practical takeomb is you don't go from the couch to the heavy lifting. And that means starting arobically at a relatively for most people, they're going to start at a relatively slow pace. In many cases, they can't even run because their heart rite zooms up to high. That's a reflection of how well, ah, how fit you are erobically. How doo know when you reach that point? It depends on the person.