Physiological adaptation following four-weeks of high-intensity functional training

• Published in: Vojnosanitetski pregled Vol. 76; no. 3; pp. 272 - 277
• Main Authors: Kliszczewicz, Brian, McKenzie, Michael, Nickerson, Brett
• Format: Journal Article
• Language: English
• Published: Ministry of Defence of the Republic of Serbia, University of Defence, Belgrade 2019
• Subjects: adaptation, physiological; exercise; exercise test; oxygen consumption
• ISSN: 0042-8450; 2406-0720
• DOI: 10.2298/VSP170228095K

Background/Aim. High-Intensity Functional Training (HIFT) is a popular mixed-modal program that utilizes both resistance and aerobic based exercises. The aim of this study was to examine the physiological effects of the HIFT programing on physically active men (10) and women (10) over a four-week period through the measure of the aerobic capacity, anaerobic capacity, and maximal weight lifted. Methods. The participants first completed a maximal oxygen consumption (VO2max) test. After 48-hours of rest, the subjects completed the anaerobic capacity test via the Wingate protocol. Following the Wingate test, the subjects performed a 1-repetition maximum test for squat, snatch and clean at the offsite training location. After the pre-measurements were obtained, the subjects entered a four-week the HIFT intervention and returned to the lab for all post-measurements. Results. Significant improvements were observed in male and female: VO2 max (Pre: 46.7 ? 2.6, 33.7 ? 1.7 mL/kg/min; Post: 49.0 ? 3.0, 35.0 ? 1.8 mL/kg/min), Peak Wingate Power (Pre: 1206 ? 106, 708 ? 44 W; Post: 1283 ? 88, 809 ? 38 W) Mean Wingate Power (Pre: 680 ? 46, 704 ? 48 W; Post: 434 ? 15, 458 ? 18 W; p < 0.05), back squat (Pre: 128.8 ? 8.8 kg, 44.1 ? 6.8 kg; Post: 142.7 ? 9.8, 54.3 ? 6.2 kg) clean (Pre: 82.5 ? 6.2, 24.1 ? 3.4 kg; Post: 92.7 ? 5.8, 33.2 ? 3.3 kg) and snatch (Pre: 59.3 ? 4.4, 20.9 ? 1.7 kg; Post: 69.1 ? 5.3, 25.0 ? 2.3 kg; p < 0.05), respectively. No gender influence on interaction was observed over time (p > 0.05). Conclusion. The HIFT demonstrated the rapid physiological improvements in strength, aerobic and the anaerobic capacity following a four-week intervention in the physically active participants. nema