摘要：This interventional study examined the effect of a four-week vegan diet (Veg
D) during a four-week high-intensity functional training (HIFT) on performance, training results and blood biochemical indices in female (
n = 12) and male (
n = 8) moderate-trained CrossFit participants. The whole study group performed the maximum number of repetitions with a load of 70% one repetition-maximum (1RM) and a modified Fight Gone Bad (FGB
Mod) test before and after a dietary intervention (the group was divided to follow a Veg
D or a traditional mixed diet (Mix
D)) in a randomised and parallel design. Pre-exercise resting blood samples were also analysed. There was a significant improvement in the number of repetitions performed at a load corresponding to 70% of 1RM in the classic squat in the Mix
D group (
p < 0.001), and in the classic deadlift in the Veg
D group (
p = 0.014). Furthermore, there was a significant improvement in the results of the FGB
Mod performance test after a Mix
D. Moreover, an improvement in some exercises in the modified FGB
Mod test (Wall Ball after the Veg
D and the Mix
D, and rowing after the Mix
D) was also observed. However, differences between the Mix
D and the Veg
D groups were not clinically relevant. In conclusion, the short-term study conducted here indicated that a Veg
D in HIFT training positively affects strength endurance in the classic deadlift but is unlikely to be more beneficial in improving performance than a Mix
D.
