Creating my training plan ↓ During my last training block which lasted about 5 months, I’ve improved my half marathon time by 10 minutes, from 1:41 to 1:31. Since endurance was always my limiter, I mainly focused on: - Endurance: consistently increasing mileage, spending 80-90% in zone 1-2 - Threshold intervals: increasingly longer intervals at my second lactate threshold (RPE 7.5-8), to work on speed endurance (holding 4:15-4:30/km for extended periods) With my new 4:20/km pace for 21k compared