Trail running 37:03 [3] 3.53 mi (10:30 / mi) +157m 9:14 / mi
shoes: Topo (black)
Trails in the close neighborhood: 6 Hill sprints then tempo for the rest for a short training before dinner. I actually gained 15 seconds total on the 1 minute up and 1 minute down hill workout. I am accenting the use of glutes to save leg strength. Seems to work.