TMT (Stress Tress – Tread Mill Test) TMT stands for Tread Mill Test. TMT test is also known as Stress Test or Tread Mill Test.TMT test helps to measure the blood circulation inside the body when a person runs on the tread mill.It is majorly done to examine how heart functions when there is physical activity done.Doctors advise Stress test when symptoms like chest pain, shortness of breath, irregular heart beat or heavy heartbeats are there.It takes only about 15–30 minutes to perform the same.It is a safe technique that does not harm the human body