I'm a serious runner looking to improve my 5K/10K times and got a bottle of Drive to see what kind of results I can get. I got it in the mail yesterday and plan to take 4 a day, the minimum amount per the bottle. I will also be stacking this with Cordygen V02 but will only take it a few days leading up to a race. Look for me to update this a few times a week with my mileage per day and also with race results. Today I ran a 5K in 22:03, last week I got 21:49. I also ran another 8 miles after the race so I got 11 miles total today. I have been averaging 40 miles a week and hope to see some more improvements in endurance. Looking to get faster!