Comparison of Muscular Endurance and Hypertrophy Resistance Training on Cardiovascular Disease Risk in Sedentary Male Smokers

Abstract

Background: Cardiovascular disease (CVD) exemplifies a major medical problem as it is the most considerable cause of morbidity and mortality. While sport conditioning specialists understand and differentiate the different benefits of resistance training (RT) subtypes on athletic performance, this distinction is less clear for health professionals when designing CVD risk reduction programs. Objectives: This study attempted to investigate and compare the effects of hypertrophy and muscular endurance RT on CVD risk in sedentary males. Methods: Sedentary male smokers were randomly assigned to either an eight-week hypertrophy RT group (HTG) (n = 15), muscular endurance RT groups (METG) (n = 15), or a non-exercising control group (CON) (n = 15) to assess their impact on smoking, blood pressure, cholesterol, and cardiorespiratory fitness (VO2max) variables associated with the four most prominent CVD risk factors. Data were analyzed using SPSS-25 software using a paired sample t-test and ANOVA. Results: Significant (P ≤ 0.05) improvements were found in three of the 15 measured variables in the HTG (resting mean arterial pressure (RMAP) (P = 0.024); total cholesterol (TC): HDL-C ratio (P = 0.009), and HDL-C: low-density lipoprotein cholesterol (LDL-C) ratio (P = 0.038), with a deleterious decrease in high-density lipoprotein cholesterol (HDL-C) (P = 0.027). In turn, significant improvements were found in the METG in 10 of the 15 measured variables, namely; cigarettes smoked per day (P = 0.037), resting systolic blood pressure (RSBP) (P = 0.002), resting diastolic blood pressure (RDBP) (P = 0.006), RMAP (P = 0.000), TC (P = 0.010), triglycerides (TG) (P = 0.010), LDL-C (P = 0.007), HDL-C: LDL-C (P = 0.018), non-HDL-C (n-HDL-C) (P = 0.010), and VO2max (P = 0.001), and a deleterious decrease in HDL-C (P = 0.026). Conclusions: While the oversimplification of RT design for CVD reduction has resulted in cardio-centric CVD training programs, this study demonstrates that some subtypes of RT (i.e. muscular endurance training) may prove more useful than others in reducing multiple CVD risk factors simultaneously.