Comparison of linear periodized and non-periodized combined training in health markers and physical fitness of adults with obesity: Clinical trial protocol

Abstract

The literature discusses that combined training, aerobic more resistance exercises in the same session, is a suitable strategy for people with obesity and that exercise periodization leads to positive health outcomes; however, the implication of different periodizations of combined training for health outcomes in obese adults requires further investigation. The aim of the study will be to describe the methodology used to compare the effect of linear periodized and non-periodized combined training on health markers and health-related physical fitness in adults with obesity. This is a blinded randomized controlled clinical trial investigating adults with obesity in the age group 20–50 years. The sample will be non-probabilistic, and participants will be allocated randomly into one of three groups: control group (CG), non-periodized group (NG), and periodized group (PG). The intervention will occur in 60-min sessions, 3 days a week for 16 weeks, with 1 week dedicated to familiarization with the training and 15 weeks of combined training (aerobic followed by resistance in the same session). The PG group will perform three mesocycles of 5 weeks each, progressing in intensity throughout the intervention [aerobic: from 40-49% to 60–69% of heart rate reserve (HRR); strength: from 12 to 14 maximum repetitions (MR) to 8 to 10MR]; the NG group will maintain the same relative intensity throughout the study (aerobic: 50–59% of HRR; strength: 2 sets of 10–12 MR). Participants in the CG group will maintain their usual activities without the proposed intervention. Pre- and post-intervention assessments will be performed for biochemical markers, body composition, cardiovascular parameters, cardiorespiratory fitness, maximum upper and lower limb strength, flexibility, and subjective health-related parameters. This project was approved by the Committee of Ethics and Research with Human Beings of the institution of origin (protocol 2,448,674) and registered in the Brazilian Registry of Clinical Trials (RBR-3c7rt3).

Effects Of Non-periodized And Linear Periodized Combined Exercise Training On Insulin Resistance Indicators In Adults With Obesity: A Randomized Controlled Trial

“…The present study is part of a larger project, entitled "Effects of different protocols of adult health training on obese people, which was approved by the Ethics Committee and Research on Human Beings of the institution of origin (protocol 2.448.674) and registered in the Brazilian Registry of Clinical Trials (RBR-3c7rt3). The methodological details of the larger project of this study are described in its protocol [19].…”

“…Figure 1 shows the prescribed intensities according to the groups at different times of the study. Additional methodological details can be found in the study protocol [19].…”

Effect of physical training periodization on physical activity level in adults with obesity

“…In the present study, we analyzed the physical activity and sedentary behavior variables, considered secondary outcomes in the larger project. Details of the methods were also described in a recent study 15 .…”

“…The sample calculation of the larger study 15 was performed in the program Gpower ® 3.1.7, with the adoption of level of significance of 0.05, statistical power of 80% and effect size of 0.18, as well as a 1:1:1 ratio for the groups (see the characterization of the groups below). The results of the calculation indicated a minimum of 26 participants in each group.…”

“…The participants were submitted, initially, to baseline assessments, including sample characterization measures (sociodemographic data, height and body mass), assessment of SB and habitual PA (accelerometry measures), and other assessments that were part of the larger study 15 but were not analyzed in the present one. After the assessments, the individuals were randomly assigned to three groups: training group with linear periodization (PG), non-periodized training group (NPG) and control group (CG).…”