New training regime and sprint training

This week I did more than jogging, I increased my speed of jogging to train stamina. On Tues, I ran a rapid 5 rounds. I maintained a fast pace and kept wide strides throughout 5 rounds. As I was tired after this rapid training, I did not practice short distance sprinting.
On Thurs, I ran for 3 rounds in rapid pace and had sprints of 100m.
For marathon training, it is advisable to train jogging in wide strides as this will cover more distance and contribute significantly to your time. I find that with wider strides, I can feel the difference in timing. Short strides also tend to consume more of your energy.
From now on, my weekly training will consist of a long distance run, increasing to 10 rounds next week, followed by sprint sessions where I will run with big strides.