I've been thinking it might be good to incorporate some interval work into my running and see if it makes me any less slow, so on today's 45-minute trail run I did some sprints on an easier section with walking in between. For those who do interval workouts regularly, how exactly do you go about it as far as how many to do and how fast you go in between? I feel like I should be doing slow running in between the sprints but I just don't think I can manage that yet. (And I've been running for how long??) Meant to wear my HRM on this run, but forgot it at home. However, I'm sure it was through the roof at times...