Introduction: High intensity functional trainings (HIFT) are among the most common and popular training modalities. The aim of the present study was to examine the physiological characteristics of a group of HIFT competitive athletes both in a laboratory and field setting. Methods: Twenty HIFT athletes, 10 men (29 ± 5.3 years) and 10 women (30 ± 3.2 years), were evaluated in the laboratory for anthropometric characteristics, VO 2peak , lactate threshold, maximal anaerobic power, maximal voluntary isometric and isokinetic strength, and muscle power during a countermovement jump. Athletes were also monitored in the field by measuring VO 2 and lactate during a training session. Results: HIFT competitive athletes reached high levels in VO 2peak (52.9 ± 5.67 ml·kg-1·min-1 in men; 52.4 ± 6.17 ml·kg-1·min-1 in women), VO 2 at lactate threshold (79.7% of VO 2peak in men; 74.5% of VO 2peak in women), maximal anaerobic power (7.6 ± 1.32 W·kg-1 in men; 5.0 ± 1.13 W·kg-1 in women; p < .05), maximal voluntary knee extension isometric strength (11.7 ± 1.43 N·kg-1 in men; 9.5 ± 2.25 N·kg-1 in women; p < .05) and isokinetic strength (281.4 ± 31.56 N·kg-1 in men; 243.1 ± 44.13 N·kg-1 in women; p < .05), and muscle power during a countermovement jump (54 ± 5.9 W·kg-1 in men; 40 ± 4.8 W·kg-1 in women; p < .05). VO 2peak during the on-field training session (50.6 ± 3.82 ml·kg-1·min-1 in men; 51.9 ± 5.76 ml·kg-1·min-1 in women) and lactate production (10.4 ± 0.69 mmol·l-1 in men; 9.7 ± 0.96 mmol·l-1 in women) revealed the high intensity nature of HIFT. Conclusions: Overall, HIFT athletes show exceptional performances in physiological components that are key to many different sports. The lack of specialization in exclusively one domain of physical fitness reveals the comprehensive nature of this training methodology.

中文翻译：

---

高强度功能训练运动员的生理特征

简介：高强度功能训练 (HIFT) 是最常见和流行的训练方式之一。本研究的目的是在实验室和现场环境中检查一组 HIFT 竞技运动员的生理特征。方法：20 名 HIFT 运动员，10 名男性（29 ± 5.3 岁）和 10 名女性（30 ± 3.2 岁），在实验室中评估人体测量学特征、VO 2peak 、乳酸阈值、最大无氧能力、最大自主等长和等速力量，和反向运动跳跃时的肌肉力量。还通过在训练期间测量 VO 2 和乳酸来对运动员进行现场监测。结果：HIFT 竞技运动员的 VO 2peak 达到高水平（男性 52.9 ± 5.67 ml·kg-1·min-1；女性 52.4 ± 6.17 ml·kg-1·min-1），乳酸阈值 VO 2 (79 . 男性 VO 2peak 的 7%；VO 2peak 的 74.5% 女性），最大无氧能力（男性 7.6 ± 1.32 W·kg-1；女性 5.0 ± 1.13 W·kg-1；p < .05），最大自愿膝关节伸展等长力量（11.7 ±男性 1.43 N·kg-1；女性 9.5 ± 2.25 N·kg-1；p < .05）和等速强度（男性 281.4 ± 31.56 N·kg-1；女性 243.1 ± 44.13 N·kg-1 ; p < .05)，以及反向跳跃时的肌肉力量（男性为 54 ± 5.9 W·kg-1；女性为 40 ± 4.8 W·kg-1；p < .05）。现场训练期间的 VO 2peak（男性 50.6 ± 3.82 ml·kg-1·min-1；女性 51.9 ± 5.76 ml·kg-1·min-1）和乳酸产量（10.4 ± 0.69 mmol·l -1 男性；9.7 ± 0.96 mmol·l-1 女性）揭示了 HIFT 的高强度性质。结论：总体而言，HIFT 运动员在对许多不同运动至关重要的生理成分方面表现出卓越的表现。