What about running towing an old tractor tire, no real weight but loads of resistance?
http://uk.youtube.com/watch?v=WYfSTzIqLCU
plus it makes the descents easier
http://uk.youtube.com/watch?v=Ltypsh...eature=related
What about running towing an old tractor tire, no real weight but loads of resistance?
http://uk.youtube.com/watch?v=WYfSTzIqLCU
plus it makes the descents easier
http://uk.youtube.com/watch?v=Ltypsh...eature=related