total running time 44:18. average heart rate 145.
5 x 1000 meters with 1 minute in between. 4:38, 4:40, 4:38, 4:37, 4:35.
this is the best lactate threshold workout I ahve ahd in quite some time. I have not been doing pushups and situps because I am having muscle spasms in my neck and upper back. can't get them to go away.