Now before you begin this tease, you must know that if you cannot complete any exercise, you must stop, take a rest, and end the tease. I am not responsible for any injuries or anything aching.
But just because you start getting tired, that doesn't mean you should stop. Push yourself as hard as you can. When you aren't able to go any further, then you are done and you should take a brake. Walk it off for about five minutes and then go on with your day.