I tried a workout today and just wanted your opinion on it. It was an 8 mile run (avg. 6:40 m/m), but I went out slower and got faster throughtout, i.e. 1st mile - 7:16, last mile - 6:26. This felt alot better than trying to run 6:40 for every mile. Is this a good workout for me to increase my stamina? Please respond.