Do not take this test if you are under medication such as blood pressure medicine, anti-depressants, tranquilizers, cold medicines.
Be comfortable. Remove your shoes. Pick a staircase with at least ten steps. Climb up. Climb down. Then up again. Nonstop. If, by the time you reach the top on your second climb, you are out breath, you need to do something about it. Immediately. If you are breathless on your first climb you need help. FAST!