Health, Exercise, and Sports Sciences ETDs

Publication Date

Summer 6-28-2017

Abstract

Purpose: To examine the physiological effects (energy expenditure, oxygen consumption [VO2], heart rate [HR], blood lactate [BLa-], excess post-exercise oxygen consumption [EPOC]) and perception (rating of perceived exertion [RPE] and enjoyment) of the combination of high-intensity interval training (HIIT) exercise with conventional circuit weight training (CWT; nine consecutive exercises)(CWIT) compared to HIIT exercise with tri-set training (3 three-exercise mini-circuits)(TRIIT). Methods: Fourteen trained men completed two separate resistance exercise protocols. CWIT consisted of six HIIT bouts prior to three rounds of a nine exercise CWT protocol. TRIIT consisted of three rounds of three mini-circuits consisting of three exercises with the integration of three HIIT bouts between the first and second mini-circuits and second and third mini-circuits. Both protocols were matched for exercise load and time. VO2 was measured via indirect calorimetry, BLa- was measured via portable lactate analyzer, exertion was measured via Borg scale (6-20) and enjoyment was measured via Physical Activity Enjoyment Scale (PAES). Differences between CWIT and TRIIT protocols were analyzed as group means by using paired t-tests and as protocol by time using a 2 x 5 repeated measures ANOVA (SPSS v22.0). Results: Average values for CWIT and TRIIT were similar (p>.05) for VO2, HR and RPE. Energy expenditure was significantly higher during the CWIT compared to the TRIIT protocol, as well as EPOC. BLa- was significantly higher at all post-exercise time points (immediate, 5 min, 10 min and 20 min post-exercise) following the CWIT compared to the TRIIT protocol. Both protocols were considered enjoyable according to the PAES. Conclusions: Performing HIIT prior to CWT elicits higher metabolic perturbation in comparison to the integration of HIIT with mini-circuits. CWIT also required greater energy requirements during and after the protocol compared to TRIIT. This may be useful for fitness trainers when determining how to implement HIIT into a CWT workout.

Keywords

circuit training, high-intensity exercise, resistance training, energy expenditure, exercise programming

Document Type

Dissertation

Language

English

Degree Name

Physical Education, Sports and Exercise Science

Level of Degree

Doctoral

Department Name

Health, Exercise, and Sports Sciences

First Committee Member (Chair)

Len Kravitz

Second Committee Member

Fabiano Amorim

Third Committee Member

Christine Mermier

Fourth Committee Member

Trisha VanDusseldorp

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