TMT test for stress. Tmt results?

Recently I underwent TMT as required for a term insurance plan along with blood tests. My blood tests were normal along with normal blood pressure but my proposal was postponed due to TMT findings. As per the insurance company I have mild positive case of TMT. I went to test center by walk of 2 kms and immediately test center put me on treadmill. I had asked them if a 2 km walk in a sunny day would affect TMT, they said no and put me on the mill. After walking on treadmill for 5 minutes, the computer connected to treadmill was stopped and as a result test center told me to restart test. I wanted to know do these factors influence TMT results? Also i read somewhere that we should not eat or drink anything except water atleast 2 hours before test. Please note that I had a large mug of tea (caffeine) as I drink daily in morning before going out on walk for the test. Please suggest