"Experimental group" and "Control group"

After pre-test measurements, the experimental group performed an eight-week high-intensity interval training (HIIT) program three times per week (Monday, Wednesday, Friday) alongside their regular taekwondo training. The control group continued with their regular taekwondo training only. After the eight-week intervention, post-tests were administered to both groups, and the results were recorded by the researchers.

As previously described, the test begins with the athlete in a guard position, with both feet positioned behind the starting/finishing line, and proceeds sequentially as follows:

1. The athlete must move as quickly as possible into the center point while maintaining the guard position.
2. The athlete must change direction, turn toward Partner 1, and perform a Palding kick with the left leg.
3. The athlete must move toward Partner 2 and perform a Dollyo-Chagi kick with the right leg.
4. The athlete must return to the center.
5. The athlete must move forward in the guard position, and perform a Double Palding kick toward Partner 3.
6. Finally, the athlete must return to the starting/finishing line while maintaining the guard position.

To assess the best possible single FSKT score, athletes were subjected to the FSKT10s. In this test, athletes were instructed to perform as many mid-level kicks as possible within a 10-second period, with the total number of valid kicks recorded as the score. Following a five-minute rest, the protocol was repeated, and the best score from the two trials was recorded as the FSKT10s . According to the FSKT classification, athletes who performed 16 or fewer kicks were classified as "very poor," those with 17 kicks were categorized as "poor," 18-21 kicks as "average," 22-23 kicks as "good," and 24 or more kicks were classified as "excellent".

To assess the athletes' FSKTmult scores, the FSKT test was conducted in five consecutive sets, with 10-second rest intervals between each set. Each set consisted of the maximum number of kicks the athletes could perform within 10 seconds, as previously described. At the end of the five sets, the total valid kicks performed by the athletes in each set (FSKT1, FSKT2, FSKT3, FSKT4, FSKT5) and the overall total (FSKT5x10s total) were recorded for analysis.