Dissertations and Theses @ UNI


Open Access Thesis


Weight training--Physiological aspects; Metabolism--Regulation;


The purpose of this study was twofold: 1). to evaluate the metabolic responses to varying volume load (VL), manipulated through relative training intensity and 2). to evaluate the metabolic response to training via direct and indirect methods to assess the application potential of non-invasive methods. Recreationally trained male weight lifters (n = 11) volunteered to participate in this resistance training (RT) study. During three separate testing sessions, participants completed three sets of repetitions of the barbell bicep curl exercise to technical failure with short inter-set rest intervals (60 seconds). Participants were randomly assigned one of three training intensities immediately prior to each testing session: low-load (30% 1RM), moderate-load (60% 1RM), or high-load (90% 1RM). Blood lactate was measured at baseline (Pre), immediately post exercise (Post), five minutes post exercise (Post5), and at 15 minutes post exercise (Post15). Metabolic markers VO2, VCO2, and RER were monitored at all times during each session. Low-load training resulted in significantly greater accumulated VL compared to moderate and high-load training. However, no significant differences were observed in blood lactate, VO2, or VCO2. RER values significantly favored the 30% condition over the 60% and the 90% between Post1 and Post2 and favored the 30% condition over the 90% between Post2 and Post3. Observed RER values were similar during the 30% and 60% conditions at all time points other than the period between Post1 and Post2. These results indicate that blood lactate measurements may underestimate the total exerciseassociated accumulation of metabolites, and that non-invasive, indirect markers may be more useful in assessing the metabolic training response. Additionally, these findings suggest that VL may not exert significant influence over lactate accumulation. Lastly, these findings indicate that moderate intensities may induce similar metabolic responses to low intensity training when exercise is performed for multiple sets of repetitions.

Year of Submission


Degree Name

Master of Arts


Department of Kinesiology

First Advisor

Jacob Reed, Chair, Thesis Committee

Date Original


Object Description

1 PDF file (ix, 91 pages)



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