Here is my most recent article from BJJ Legends Magazine called "BJJ Conditioning With The Prowler"...I would love to get your opinion on it...Try it out and let me know what you think: http://bjjlegends.com/bjj/jiujitsu/item/1029-bjj-conditioning-with-the-prowler
The Prowler is def the best "conditioning" tool you can buy! Highly recommend it for anyone! Prowler sprints FTW!
Another article on prowler conditioning by Jim Wendler: http://www.elitefts.com/documents/prowler_challenge.htm My favorite is challenge #2