VO2Max or the VLA4
for the Vo3max stuff, I'd start with: http://www.vo2max.net/ then: http://www.tufts.edu/vet/sports/oxygen.html and: http://64.233.167.104/search?q=cache:UGeDed54O4oJ:www.turfclub.com.sg/web/tchappening.nsf/0/1c8754ed4275486948256c7e00296618/%24FILE/Allan%2520Davie%2520Seminar%2520Notes.doc+VO2Max+Equine&hl=en as for VLA4, maybe: http://www.neosoft.com/~iaep/pages/membersonly/vetperiodicals/jjes/jjes.html and http://www.harness.org.au/99wldcon/PPnchrd2.pdf How does one practically measure them (w/o drawing blood) in a training regime? jt. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=