The Release of Lipolytic Hormones during Various High-Intensity Interval and Moderate-Intensity Continuous Training Regimens and Their Effects on Fat Loss.

Autor: Zhu X; Physical Education College, Hebei Normal University, Shijiazhuang, China., Jiao J; Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong, China.; Dr. Stephen Hui Research Centre for Physical Recreation and Wellness, Hong Kong Baptist University, Hong Kong, China., Liu Y; Physical Education College, Hebei Normal University, Shijiazhuang, China., Li H; Physical Education College, Hebei Normal University, Shijiazhuang, China., Zhang H; Physical Education College, Hebei Normal University, Shijiazhuang, China.; Hebei Provincial Key Lab of Measurement and Evaluation in Human Movement and Bio-Information, Hebei Normal University, Shijiazhuang, China.
Jazyk: angličtina
Zdroj: Journal of sports science & medicine [J Sports Sci Med] 2024 Sep 01; Vol. 23 (1), pp. 559-570. Date of Electronic Publication: 2024 Sep 01 (Print Publication: 2024).
DOI: 10.52082/jssm.2024.559
Abstrakt: To investigate the release of lipolytic hormones during various high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT), and their effects on fat loss. 39 young women categorized as obese (with a body fat percentage (BFP) ≥30%) were randomly allocated to one of the following groups: all-out sprint interval training (SIT, n =10); supramaximal HIIT (HIIT 120 , 120%V̇O 2peak , n = 10); HIIT (HIIT 90 , 90%V̇O 2peak , n = 10), or MICT, (60%V̇O 2peak , n = 9) for a twelve-week observation period consisting of 3 to 4 exercise sessions per week. Serum epinephrine (EPI) and growth hormone (GH) were measured during the 1st, 20th, and 44th training sessions. Body weight (BW), body mass index (BMI), whole-body fat mass (FM) and BFP were assessed pre- and post-intervention. Following the 1st and 20th sessions, significant increases in EPI (p < 0.05) were observed post-exercise in HIIT 120 and HIIT 90 , but not in SIT and MICT. In the 44th session, the increased EPI was found in SIT, HIIT 120 , and HIIT 90 , but not in MICT (p < 0.05). For the GH, a significant increase was observed post-exercise in all groups in the three sessions. The increased EPI and GH returned to baselines 3 hours post-exercise. After the 12-week intervention, significant reductions in FM and BFP were found in all groups, while reductions in BW and BMI were only found in the SIT and HIIT groups. Greater reductions in FM and BFP, in comparison to MICT, were observed in the SIT and HIIT groups (p < 0.05). 12-week SIT, HIIT 120 , and HIIT 90 , in comparison to MICT, were more efficacious in fat reduction in obese women, partly benefiting from the greater release of lipolytic hormones during training sessions.
(© Journal of Sports Science and Medicine.)
Databáze: MEDLINE
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