Speed work often gets neglected in my training but I can tell when I am at mile 20 if I have done the proper amount of speed work. There are some critical things you need to focus on while you are training for a marathon that include tempo runs, strength training, and mileage. There are some classic VO2 max workouts that consists of repeats with a duration of 3-5 minutes. These are awesome to test your fitness and really train how your muscles will feel that last 10 K of the race. After you have achieved some goal times and are ready to take it to the next level, do not focus on increasing the length of the workout but focus on shorter distance with sprints as short as 50 meters. Studies have shown that this can change the way your body works on race day. There are many different ways that you can incorporate these workouts into your training. 1. Short for Speed Endurance: This is a very important workout because on race day, this will make your feel like you a...