<p><em>Objective: </em>To investigate the effects of the addition of a specific high-intensity intermittent training (HIIT) protocol to the habitual training on the physical fitness of amateur wushu sanda athletes. <em>Methods: </em>This is an experimental study in which 6 amateur regional level wushu sanda athletes (24.6±6.4 yrs, 1.70±0.1m height, and 71.3±7.3kg weight) underwent a 2 session/week training program for 4 weeks. The HIIT specific protocol was composed of 3 rounds of 2 minutes with 1-minute intervals in between, simulating a match duration. Each round was divided into 8 blocks of 15 seconds. Each block was composed of 5 seconds of high-intensity activities, 5 seconds of low-intensity activities and 5 seconds of pause. Countermovement jump, squat jump, horizontal jump, aerobic fitness (TKDtest) and kick speed test (FSOK) were applied.<em> Results:</em> Athletes presented performance increases in countermovement jump (from 41±5.7 to 47.3±7.3cm, <em>p</em>=0.007, <em>g</em>=0.88), horizontal jump (from 1.7±0.4 to 2.3±0.3cm, <em>p</em>=0.01, <em>g</em>=1.56) and in the FSOK test (from 19.8±1.7 to 23.0±2.5 kicks, <em>p</em>=0.003, <em>g</em>=1.38). The resting heart rate decreased (from 120±8.3 to 107±11.4 bpm, <em>p</em>=0.03, <em>g</em>=1.20) and the time to exhaustion increased (from 8.5±1.8 to 13.1±1.4 min, <em>p</em>=0.003, <em>g</em>=2.63), as well as the number of kicks (from 187±55.3 to 368±39.8 kicks,<em> p</em>=0.001, <em>g</em>=3.46). <em>Conclusion:</em><strong> </strong>Despite the small sample size, the large effect sizes found support the conclusion that<strong> </strong>the addition of a specific HIIT wushu sanda protocol to amateur athletes' training routine can lead to neuromuscular, aerobic and anaerobic performance improvements.</p>