Table 1. 10 Items of Quality Assessment Checklist. Original checklist was designed by Kmet and his team (2004), and this study adopted a revised version that presented in Martens’ systematic review (Kmet et al., 2004; Martens et al., 2015b). Reviewers would score each item with 0, 1, 2 or NA if the item was not applicable for that study. The summation of scores was calculated for each study and the final score was presented in percentage. No. Question Score 1 Question/Objective sufficiently described? 0, 1, 2 2 Study design evident and appropriate? 0, 1, 2 3 Connection to a theoretic framework/wider body of knowledge? 0, 1, 2 4 Subject characteristics sufficiently described? /     4a     Age (Mean and Standard Deviation) 0, 1, 2     4b     Gender 0, 2     4c     Swimming/Activity Level of participants 0, 1, 2 5 Data collection methods clearly described and systematic? /     5a     Research Protocol 0, 1, 2     5b     Type of EMG system 0, 1, 2     5c     Studied muscles 0, 1, 2     5d Unilateral or Bilateral 0, 1, 2 or NA 6 Data analysis clearly described and systematic? /     6a     EMG filters 0 or 2     6b     Normalization Method 0, 1, 2     6c     Data Processing Protocol 0, 1, 2 7 Some estimate of variance is reported for the main results? 0, 1, 2 or NA 8 Conclusions supported by the results? 0, 1, 2 9 Number of participants sufficient to draw conclusions? 0, 2, 4,6 10 Statistical analysis is described and appropriate? 0, 1, 2 or NA Reviewers would score each item with 0, 1, 2 or NA if the item was not applicable for that study. The summation of scores was calculated for each study and the final score was presented in percentage.