The acute effect of exercise modality and nutrition manipulations on post-exercise resting energy expenditure and respiratory exchange ratio in women: a randomized trial.

Hailee L Wingfield,Malia N Melvin,Mark A Weaver,Abbie E Smith-Ryan,Eric D Ryan,Erica J Roelofs,Eric T Trexler,Anthony C Hackney

doi:10.1186/s40798-015-0010-3

Hailee L Wingfield, Malia N Melvin + Show 6 more

Open Access

https://doi.org/10.1186/s40798-015-0010-3

Copy DOI

Abstract

BackgroundThe purpose of this study was to examine the effect of exercise modality and pre-exercise carbohydrate (CHO) or protein (PRO) ingestion on post-exercise resting energy expenditure (REE) and respiratory exchange ratio (RER) in women.MethodsTwenty recreationally active women (mean ± SD; age 24.6 ± 3.9 years; height 164.4 ± 6.6 cm; weight 62.7 ± 6.6 kg) participated in this randomized, crossover, double-blind study. Each participant completed six exercise sessions, consisting of three exercise modalities: aerobic endurance exercise (AEE), high-intensity interval running (HIIT), and high-intensity resistance training (HIRT); and two acute nutritional interventions: CHO and PRO. Salivary samples were collected before each exercise session to determine estradiol-β-17 and before and after to quantify cortisol. Post-exercise REE and RER were analyzed via indirect calorimetry at the following: baseline, immediately post (IP), 30 minutes (30 min) post, and 60 minutes (60 min) post exercise. A mixed effects linear regression model, controlling for estradiol, was used to compare mean longitudinal changes in REE and RER.ResultsOn average, HIIT produced a greater REE than AEE and HIRT (p < 0.001) post exercise. Effects of AEE and HIRT were not significantly different for post-exercise REE (p = 0.1331). On average, HIIT produced lower RER compared to either AEE or HIRT after 30 min (p < 0.001 and p = 0.0169, respectively) and compared to AEE after 60 min (p = 0.0020). On average, pre-exercise PRO ingestion increased post-exercise REE (p = 0.0076) and decreased post-exercise RER (p < 0.0001) compared to pre-exercise CHO ingestion.ConclusionHIIT resulted in the largest increase in REE and largest reduction in RER.Electronic supplementary materialThe online version of this article (doi:10.1186/s40798-015-0010-3) contains supplementary material, which is available to authorized users.

Highlights

The purpose of this study was to examine the effect of exercise modality and pre-exercise carbohydrate (CHO) or protein (PRO) ingestion on post-exercise resting energy expenditure (REE) and respiratory exchange ratio (RER) in women
high-intensity interval training (HIIT) resulted in the largest increase in REE and largest reduction in RER
RER The three-way interaction for RER was non-significant (p = 0.161), so it was removed from the model

Summary

Introduction

The purpose of this study was to examine the effect of exercise modality and pre-exercise carbohydrate (CHO) or protein (PRO) ingestion on post-exercise resting energy expenditure (REE) and respiratory exchange ratio (RER) in women. High-intensity resistance training (HIRT) with short rest intervals has been shown to enhance post-exercise REE above that seen with more commonly prescribed resistance training [8] of lesser intensity and longer rest periods. While these three common exercise modes seem to be successful at expending calories, previous research has indicated that high-intensity exercise stimulates similar increases in post-exercise REE in comparison to lower intensity exercise, in half the time [9,10]. Higher intensity exercise has been linked to higher rates of fat oxidation, measured by respiratory exchange ratio (RER) [6,11,12]

Objectives

Methods

Results

Conclusion