- threshold intervals
-- warm up
-- 8 x [3 min @ threshold, 1 min walk]
-- cool down
intervals in 4:01-02, except the first was a little hot in 3:59. sort of meant for this to be NSM-style but if my threshold estimate of 4:03 is correct then i ran these too fast. need to program watch to set 4:03 as the lower limit. legs felt pretty good, it was a little breezy but otherwise a really nice morning.