This August we continue to train at a high volume while also incorporating more high intensity interval sessions. Week 18 is a hard week designed to have one L4 session and one L3 day. Check out our new L4 natural bounding session and have fun with a L3 pyramid workout. This time of year we want to make sure we distinguish between these two paces in order to work different aerobic and anaerobic systems. Use easy distance days to work on technique (see skate ski knee drive) and continue to keep the easy days L1 in order to refine our aerobic base.