Interval season

Summary of the interval sessions:

• ran 83.3 kms in 8h04m (13 sessions)
  
• skated 161.3 kms in 10h26m (16 sessions)

18.289 kCalories burnt during the above. I've done intervals like 20 sec on, 40 sec off, repeated 10 times, or 20 sec on, 10 sec off, 6x. I could easily manage to survive them, but I am quite unhappy with the quantity of distances covered during this interval period.