High-intensity training can lead to increased muscle fatigue due to the demanding nature of short, intense bursts of exercise. While beneficial for building strength and endurance, these workouts may deplete energy stores more rapidly, resulting in quicker onset of fatigue. However, they also promote muscular adaptations that enhance performance over time. To counteract fatigue, incorporating adequate rest and recovery periods is essential. Thus, while high-intensity training can be taxing, it can also contribute to long-term fitness improvements when balanced appropriately.