5 months ago, I started to run again after more than 2 years without any exercise. At the starting point, I was 67kg and I could run only 5 minute. My heart beated arrhythmically and I breathed through my both mouth and nose uncontrolly.
Day by day, I've been used to breathing efficiency and my endurance is build-up gradually. After 1 month, I could run in 1 hour continuously but I still had problem with running pace. Disapointedly, the increase of stamina did not come with the improvement of speed but the problems did not stop there. I had got an injury in midfoot cause of the hard work and wrong running form. Believe that youtube have everything, I searched for this kind of pain and it linked me to some videos of stretching exercises before running, running form, running schedule, etc... and I knew that I had to learn from zero if I want to get out of injury.
I watched a lot of running videos and everything seemed to change rapidly. I had more control in running and astonishedly I lost weight, 64kg, 62kg, 60kg, 58kg and now I'm only 56kg. With the lower weight and more correct running form, my running pace is increased notably.
I don't have the GPS watch for runner, I just have a Casio G-Shock one, so then I entered Google Maps and measured the running route online. I calculated that my running pace is accelerated more than 25%, from 9km/h to 11.5km/h recently. On the other hand, I feel a remarkable change in my leg muscles used in running. I run everday, 7 days of week (except the raining day), the avarage mileage is 10km. It seems no space for resting but it's my purpose. I don't let my muscles rest cause I need them to be used to tolerate this intensity.
My big goal is running through Vietnam (from Hanoi to Ho Chi Minh city) in the next year therefore I still have plenty of works. The idiom "Think Big but Start Small" is right in this case.
