Plastic running to compared to the general road, in addition to less traffic lights, no various cars, the environment is safe, you can be more focused when running, the runway also has a better cushioning effect, so you want to feel better about road running, you can buy a pair of running shoes with better cushioning and rebound effect, in addition, what kind of road surface is also very important, generally asphalt road is better than cement pavement, it is best not to choose a block of stone pavement. There is also that you run fast, the heart rate is higher, it is best to use your watch 138-152 gear of heart rate running, at the beginning there is no need to pursue pace, should be the first heart rate, usually running more aerobic running, can better train the aerobic domain, aerobic range is wide, naturally can run faster. In addition, your cadence on the plastic track is better than road running, cadence responds to running rhythm, cadence stability rhythm is better, running is easier, you can reduce stride, you can practice cadence, try to stabilize the cadence at about 160 (you are now from 120 to 200 cadence range, up and down are reduced to the average left and right, there is a metronome on KEEP), I feel that I can easily control the improvement little by little in the future (it is recommended to improve 5 times per minute each time), while adjusting the running posture and breathing, I'm sure you'll be able to run easier soon.