Padel is an intermittent sport played in pairs on a 20 × 10 m court surrounded by glass walls and a metal fence on which the balls can bounce [7]. It can be considered a predominantly aerobic sport with short periods of high and very high-intensity action in which the phosphagen system...
The topography is higher in the northwest and lower in the southeast, sloping from northwest to southeast. The terrain is intricate and complex with mountains and valleys. The geological structure system mainly belongs to the eastern and western tectonics of the Qinling Mountains. Gannan is ...