Here is a great article explaining the difference:
Recent WODs and Results
- Jordan Levin - 58 mins 25 secs | Not Rx'd February 6, 2012[…]Jordan Levin
- Bobby Raitt - 41 mins 54 secs | Not Rx'd February 6, 2012[…]Bobby Raitt
- John Balcazar - 55 mins 50 secs | Rx'd February 6, 2012yep... still brutal! […]John Balcazar
- Kate Donohue - 58 mins 45 secs | Rx'd February 6, 2012[…]Kate Donohue
- Liz Bachrach - 58 mins 25 secs | Rx'd February 6, 2012No band 55/35# […]Liz Bachrach