rh,
What Jon is referring to is commonly called 'Active recovery' whereby you are not literally training or working out but you are active. Passive recovery is like taking nap or gettting your required amount of sleep at night.
Using a swimming pool as a recovery tool os an often overlooked thing too. Sometimes hard to find this time of year though unless you have the hook up of an indoor facility.
Foam rollers or another product called "The Stick" work wonders for moving waste products out of the muscles and promoting recovery.
DOMS or delayed onset muscle soreness is usually a function of the intensity level of the training but can also come about due to insufficient recovery/regeneration and/or dehydration.
Jason
www.360performance.net