Today we did 1km intervals for the first time ever......in the past we did a regular 400/100/50/50 hill/plank workout which caused me some injury.....1km intervals feel so much better for my older body as they dont have the hard kick off starts of 100's and 50's although they certainly drain you of energy......we did a slow 2km jog then 4 intervals with short breaks and jogged home......times ? 4.09, 4.04, 4.20, 4.23..Im pretty happy with that and it's nice to know we have these times in us if we want to make a surge or a fast finish....
