Effects of Eight Week High-Intensity Interval Training Program Followed by a Six Week Detraining on Healthy Adult Gym-Users

• Autor(a) principal: Branquinho, Luís
• Data de Publicação: 2023
• Outros Autores: Gomes, Pedro Anselmo, Ferreira, Luís, Brito, Diana, Hattabi, Soukaina, Ghouili, Hatem, Sampaio, Tatiana, Malheiro, Maria Alexandra, Teixeira, José Eduardo, Forte, Pedro, Ferraz, Ricardo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10198/30024
• topic: Body Composition; Exercise; Health; Human Body; Maximum Oxygen Consumption; Physical Performance; Research Subject Categories::INTERDISCIPLINARY RESEARCH AREAS

The literature has reported that high-intensity training (HIIT) can effectively improve maximum oxygen uptake (VO2 max) and body composition (BC). Still, contradictory results are reported regarding its impact of HIIT training and post-period detraining on gym users. Objective: This study aimed to verify how eight weeks of HIIT affects VO2 maximum and BC in healthy gym users. Additionally, the effect of a six-week detraining period was verified. A group of 10 gym-users (mean ± SD age: 29.03 ± 6.18 years) volunteered for this randomized controlled trial (RCT). Method: A HIIT program that included exercises such as jumping air squats, burpees and jumping jacks was applied over eight weeks. After this period, a six-week detraining period was applied. To measure changes in VO2 max, the Queen’s College Step Test (QCST) was applied, while a bioimpedance scale was used to measure BC. Results: Eight weeks of HIIT seem to show a tendency to increase VO2 max and cause positive changes in BC (p ≤ 0.05) with the exception of two variables (i.e., fat-free mass and fat mass). Furthermore, the results suggest that 6 weeks of detraining may negatively affect gains resulting from the training program, particularly in VO2 max and body mass index (BMI) p ≥ 0.05. Conclusions: Eight-week HIIT program incorporating short-duration explosive exercises can positively affect VO2 max and BC in adult gym users.