Muay Thai became popular in the sixteenth century, but became widespread internationally only in the twentieth century, when many Thai fighters won several victories over representatives of other martial arts.
How to improve leg speed. Once you have built a good aerobic base and are able to get around your chosen distance, the next target is likely to be to run it faster. To do this you need to increase the speed at which you can turn your legs over. You will make these improvements if you introduce some speed work into your training sessions. Below are sessions that you could include in your programme. 1. Fartlek.
1 Use your right leg to help you push off the ground and kick your left leg up and over your body. Keep your left leg straight as you move it off the ground, and think about moving it directly over your body.  Don't let your left leg or right arm sway to the sides. Keep them straight as you move into the bend.