This coming Sunday, I'll be running my 2nd half marathon in the town of Pak Chong, Thailand, near the lovely Khao Yai National Park. I'm already a little nervous but excited to join my fellow Bangkok Runners in the event.
Half marathon training schedules contain a mix of long slow runs and shorter, faster efforts in order to prepare you both for lasting the full 21km (13.1 miles) and doing so as fast as you can without injury. Some also contain cross-training days, which could consist of swimming, cycling, circuit training or other non-running fun. Here, here, and here are some examples for beginners.
Looking at the schedules made me think of athletes that champion these different types of training and about how sprinting vs marathoning vs doing other activities affect the human body. And about which type of physical development might be better for fitness?
A long time ago, your physical condition was IMPORTANT for eating (hunting + scavenging) and escaping dangers such cold, heat, and predators, so are we naturally sprinters or marathoners?

Looking at the schedules made me think of athletes that champion these different types of training and about how sprinting vs marathoning vs doing other activities affect the human body. And about which type of physical development might be better for fitness?
A long time ago, your physical condition was IMPORTANT for eating (hunting + scavenging) and escaping dangers such cold, heat, and predators, so are we naturally sprinters or marathoners?