HI Neil .. the body and mind have to get used to zone 3 aerobic running, particularly if threshold was to go to run. With threshold running your movement and stride is more efficient, if you have not done such easy running for a while the gait and form are less efficient causing different areas to fatigue. It may take a little longer than expected but it will swing round as soon as the body absorbs the training and moves to a new level .. next week we will introduce the first 1k paced session with a 1 to 2k warm up and then light warm down ..
hang in there. TheEd
hang in there. TheEd
