This workout is as easy as 4-3-2-1, twice over. Do it fast. Do it cruisy. You choose. The one rule for this session, though, is have FUN! WHAT? Fartlek Countdown to Christmas Pt.1 2 sets of: 4-3-2-1 minutes @ speeds of your choosing 1 minute jog recoveries Terrain: Undulating trails or flat, measurable pathway (you[…]