This program is amazing me as I progress into each week. I am 49, unfit and a tad overweight and I THINK I can do this? YES! I know I WILL! My very first week I struggled on the 60 sec. runs (walking a few steps toward the end) Week 2 terrified me but I plugged along...week 3 scared me, but I did it! Week 2 and 3 I have been able to run each running segment without stopping. It is also amazing that last night on my third run ALL of my 3 minute runs were faster then I could pace on my 1 minute first week runs! Without this board I would of already been frustrated and given up. Thankfully, all of you are here giving great advice and offering wonderful support. Now, I am freaking out over week 4!!!!! How in the world will I ever run 3 and 5 minute segments??!!!