Aerobic and Anaerobic Energy During Resistance Exercise at 80% 1RM

Jefferson Vianna,Francisco Saavedra,Victor Reis,Jorge Lima

doi:10.2478/v10078-011-0061-6

Jefferson Vianna, Francisco Saavedra + Show 2 more

Open Access

https://doi.org/10.2478/v10078-011-0061-6

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Abstract

The present study investigated the accumulated oxygen deficit (AOD) method to assess the energy cost in resistance exercises (RE). The aim of the study was to evaluate the aerobic and anaerobic energy release during resistance exercises performed at 80% 1-RM in four exercises (half squat, bench press, triceps extension and lat pull down), as well as the accuracy of its estimation. The sample comprised 14 men (age = 26.6 ± 4.9 years; height = 177.7 ± 0.1 cm; body mass = 79.0 ± 11.1 kg; and estimated fat mass = 10.5 ± 4.6%). Test and re-test of 1-RM were applied to every exercise. Low-intensity bouts at 12, 16, 20, and 24% of 1-RM were conducted. Energy cost was then extrapolated to 80% 1-RM exhaustive bout and relative energy contribution were assessed. By utilizing the AOD method, the results of the present study suggest a great proportion of anaerobic metabolism during exercise at 80% 1-RM in the four RE that were analyzed: Bench press = 77,66±6,95%; Half squat = 87,44±6,45%; Triceps extension = 63,91±9,22%; Lat pull down = 71,99±13,73 %. The results of the present study suggest that AOD during resistance exercises presents a pattern that does not match the reports in the literature for other types of exercise. The accuracy of the total energy demand estimation at 80% 1-RM was acceptable in the Bench press, in the Triceps extension and in the Lat pull down, but no in the Half squat. More studies are warranted to investigate the validity of this method in resistance exercise.

Highlights

Physical exercise is recognized as an important tool in increasing the energetic cost (EC)
Some authors reported that the highest values of EC occur during the exercise session (Phillips and Ziuraitis, 2003, 2004), while others suggest that the EC could come from the post-exercise increase in metabolic rate induced by the resistance exercise (RE), with long-term impact on body composition (Schuenke et al, 2002)
This study utilized accumulated oxygen deficit (AOD) to evaluate the proportion of anaerobic and aerobic energy during resistance exercises at 80% 1-RM

Summary

Introduction

Physical exercise is recognized as an important tool in increasing the energetic cost (EC). Some authors reported that the highest values of EC occur during the exercise session (Phillips and Ziuraitis, 2003, 2004), while others suggest that the EC could come from the post-exercise increase in metabolic rate induced by the RE, with long-term impact on body composition (Schuenke et al, 2002). Scott (2006) mentions that the participation of anaerobic metabolism could represent up to 39% of EC in the RE, which could be estimated by adding the blood lactate accumulation converted to O2 equivalents. Scott (2006) reports that measures of individual blood lactate in the RE have the potential to indicate a greater EC compared with the sole measure of VO2.

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