## 3 Results  
Through the search process, 951 publications were initially identified. A study selection flowchart is presented in Figure 1. After reviewing the titles and abstracts of the publications, certain studies were excluded, and the eligibility of the remaining articles was further evaluated through a full-text review. Figure 1: Flowchart of study. Table 1 shows the results of the methodological quality of the studies by the TESTEX tool. According to the tool, all included studies scored above 10 points (score range: 0-15 points). The most sensitive points in the studies were: evaluator blinding, participant blinding, randomization of studies, and the form of allocation of participants. This resulted in 23 studies included in synthesis with 6 subgroups classification [23; 30; 35; 47; 48; 49; 50; 51; 52; 53; 54; 55; 56; 57; 58; 59; 60; 61; 62; 63; 64; 65; 66; 67; 68; 69; 70; 71;  
\begin{table}
\begin{tabular}{l l l l l l l l l l l l l l l l l l l l l} \hline \hline
**Classiliu-** & **online** & **Author** & **Year** & **N** & **Age** & **Population** & **Exotices** & **Phase** & \multicolumn{2}{c}{**\%**} & \multicolumn{2}{c}{**Mosetics**} & \multicolumn{2}{c}{**\%**} & \multicolumn{2}{c}{**\%**} & \multicolumn{2}{c}{**Mosetics**} & \multicolumn{2}{c}{**\%**} & \multicolumn{2}{c}{**\%**} & \multicolumn{2}{c}{**\%**} \\  & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** & **online** \\  
Figures 2-7 show the forest plots of the analyses performed on pectoral activation. Each of them includes all the measurements made within each item. In this case, it is shown how some articles only include one piece of data while other articles include a greater number of pieces of data. This is due to the fact that some articles make several measurements assessing different phases or different percentages of RM. A total of four studies compare pectoral activation produced at different grip widths [23; 57; 60; 66]. Two studies analyze the activation in clavicular pectoralis and three studies the activation in the sternal pectoralis. Pooled analysis shows that the original exercise BP (medium grip distance) activate the clavicular (SMD = \(-\)0.38; 95%CI = \(-\)1.82; 1.10) and sternal portion (SMD = 0.49; 95%CI = \(-\)0.75; 2.20) of the pectoral as well as the narrow grip. The variability among effects is presented in the forest plot in Figure 2.  
In relation to the declined angle there are three studies analyze the activation of the clavicular portion and another three analyze the activation of the sternal portion. No differences were shown in the pectoral activation (clavicular or sternal portion) when compared with the activation in the exercise performed without decline (Figure 3). In relation to the activation of the pectoral taking into account the inclination of the bench, there are four studies included in the present meta-analysis [35; 50; 53; 65], three studies analyze the activation of the clavicular portion and another three analyze the activation of the sternal portion. The analysis shows that the BP variant with the inclined bench activates less the sternal portion (significantly) (SMD = 1.80; 95%CI 0.40 a 3.19; \(p\) = 0.017). No differences were found in clavicular portion.