Research on the Enhancement of Aerobic Metabolic Energy Supply Capacity by Ischemic Preconditioning.

The purpose of this clinical trial is to investigate whether IPC can improve aerobic capacity during exercise. The primary question it aims to answer is: Does IPC enhance the aerobic capacity of athletes? The researchers will compare IPC (220 mmHg pressure) with a placebo (20 mmHg pressure) to see if different interventions can enhance aerobic capacity and exercise performance. Participants will: * Undergo a randomized crossover controlled trial, visiting twice, with a one-week interval between each test. * Conduct two assessments at the testing site each time, namely a pre-intervention assessment and a post-intervention assessment. * Record their heart rate, blood pressure, weight, oxygen uptake, Taekwondo-specific performance, and other indicators.