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Lookup NU author(s): Dr Deb DulsonORCiD
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© 2017 National Strength and Conditioning Association.The purpose of this study was to compare the acute physiological responses within and between resistance training (RT) and high-intensity interval training (HIIT) matched for time and with comparable effort, in a school setting. Seventeen early adolescents (12.9 ± 0.3 years) performed both RT (2-5 repetitions perceived short of failure at the end of each set) and HIIT (90% of age-predicted maximum heart rate), equated for total work set and recovery period durations comprising of 12 "sets" of 30-second work followed by 30-second recovery (total session time 12 minutes). Variables of interest included oxygen consumption, set and session heart rate (HR), and rate of perceived exertion, and change in salivary cortisol (SC), salivary alpha amylase, and blood lactate (BL) from presession to postsession. Analyses were conducted to determine responses within and between the 2 different protocols. For both RT and HIIT, there were very large increases pretrial to posttrial for SC and BL, and only BL increased greater in HIIT (9.1 ± 2.6 mmol·L-1) than RT (6.8 ± 3.3 mmol·L-1). Mean set HR for both RT (170 ± 9.1 b·min-1) and HIIT (179 ± 5.6 b·min-1) was at least 85% of HRmax. VO2 over all 12 sets was greater for HIIT (33.8 ± 5.21 ml·kg-1·min-1) than RT (24.9 ± 3.23 ml·kg-1·min-1). Brief, repetitive, intermittent forays into high but not supramaximal intensity exercise using RT or HIIT seemed to be a potent physiological stimulus in adolescents.
Author(s): Harris NK, Dulson DK, Logan GRM, Warbrick IB, Merien FLR, Lubans DR
Publication type: Article
Publication status: Published
Journal: Journal of Strength and Conditioning Research
Print publication date: 01/05/2017
Acceptance date: 02/06/2016
ISSN (print): 1064-8011
ISSN (electronic): 1533-4295
Publisher: NSCA National Strength and Conditioning Association
PubMed id: 27537411
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