Table 2.
Metaregression analisys taking in to account de participants and training characteristics, at the begin the study.
| Model | n Studies/ Groups |
Estimate | Lower | Upper | p | Estimate | Lower | Upper | p | τ2 | Adj. R2 | I2 | p |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Intrcpt | Moderator coeff. | Heterogeneity | |||||||||||
| Overall Effects | |||||||||||||
| No covariables | 158 | 1.530 | 1.300 | 1.753 | <0.001 | 0 (SE = 0.13) | 0% | 1.000 | |||||
| Participants Characteristics | |||||||||||||
| Age (years) | 142 | 0.943 | −0.962 | 2.849 | 0.332 | 0.02 | −0.06 | 0.10 | 0.58 | 0 (SE = 0.15) | NA% | 0% | 1.000 |
| Weight (kg) | 150 | 1.138 | −1.822 | 4.098 | 0.451 | 0.00 | −0.03 | 0.04 | 0.82 | 0 (SE = 0.14) | NA% | 0% | 1.000 |
| Height (m) | 126 | −0.014 | −6.032 | 6.004 | 0.996 | 0.80 | −2.58 | 4.18 | 0.64 | 0 (SE = 0.15) | NA% | 0% | 1.000 |
| Training Status | 119 | 1.547 | 1.167 | 1.927 | <0.001 | −0.16 | −0.40 | 0.08 | 0.19 | 0 (SE = 0.18) | NA% | 0% | 1.000 |
| Training Characteristics | |||||||||||||
| Study Durations (weeks) | 156 | 1.428 | 0.896 | 1.960 | <0.001 | 0.01 | −0.04 | 0.06 | 0.69 | 0 (SE = 0.13) | NA% | 0% | 1.000 |
| Sessions | 152 | 1.492 | 0.939 | 2.045 | <0.001 | 0.00 | −0.02 | 0.02 | 0.89 | 0 (SE = 0.13) | NA% | 0% | 1.000 |
| Days per week | 149 | 1.528 | 0.502 | 2.553 | 0.004 | −0.01 | −0.31 | 0.30 | 0.97 | 0 (SE = 0.14) | NA% | 0% | 1.000 |
| n exercises per workout | 141 | 1.423 | 0.640 | 2.207 | <0.001 | 0.01 | −0.09 | 0.11 | 0.87 | 0 (SE = 0.16) | NA% | 0% | 1.000 |
| Rest between exercise (min) | 121 | 1.336 | 0.646 | 2.025 | <0.001 | 0.05 | −0.23 | 0.32 | 0.74 | 0 (SE = 0.16) | NA% | 0% | 1.000 |
| n set per workout | 123 | 1.853 | 1.453 | 2.253 | <0.001 | −0.03 | −0.05 | −0.00 | 0.04 | 0 (SE = 0.14) | NA% | 0% | 1.000 |
| range repetitions | 123 | 1.257 | 0.486 | 2.029 | 0.001 | 0.02 | −0.07 | 0.12 | 0.61 | 0 (SE = 0.17) | NA% | 0% | 1.000 |
| Training duration (min) | 35 | 1.548 | −0.248 | 3.344 | 0.091 | 0.00 | −0.03 | 0.03 | 0.75 | 0 (SE = 0.40) | NA% | 0% | 1.000 |
| Average Intensity (%1RM) | 89 | 2.353 | −1.383 | 6.089 | 0.217 | −0.01 | −0.06 | 0.04 | 0.63 | 0 (SE = 0.22) | NA% | 0% | 1.000 |
| Fat Free Mass | |||||||||||||
| No covariables | 82 | 1.550 | 1.223 | 1.886 | <0.001 | 0 (SE = 1.91) | 0% | 1.000 | |||||
| Participants Characteristics | |||||||||||||
| Age (years) | 77 | 1.116 | −1.534 | 3.766 | 0.409 | 0.02 | −0.09 | 0.13 | 0.74 | 0 (SE = 1.95) | NA% | 0% | 1.000 |
| Weight (kg) | 80 | −0.183 | −4.371 | 4.006 | 0.932 | 0.02 | −0.03 | 0.08 | 0.42 | 0 (SE = 0.21) | NA% | 0% | 1.000 |
| Height (m) | 67 | −1.960 | −18.842 | 14.930 | 0.82 | 1.96 | −7.55 | 11.46 | 0.69 | 0 (SE = 0.21) | NA% | 0% | 1.000 |
| Training Status | 70 | 1.530 | 1.082 | 1.978 | <0.001 | −0.13 | −0.41 | 0.15 | 0.37 | 0 (SE = 0.24) | NA% | 0% | 1.000 |
| Training Characteristics | |||||||||||||
| Study Durations (weeks) | 80 | 1.314 | 0.534 | 2.094 | <0.001 | 0.02 | −0.05 | 0.10 | 0.50 | 0 (SE = 0.20) | NA% | 0% | 1.000 |
| Sessions | 76 | 1.172 | 0.297 | 2.047 | 0.009 | 0.01 | −0.01 | 0.04 | 0.35 | 0 (SE = 0.20) | NA% | 0% | 1.000 |
| Days per week | 76 | 1.154 | −0.325 | 2.633 | 0.126 | 0.11 | −0.30 | 0.53 | 0.59 | 0 (SE = 0.20) | NA% | 0% | 1.000 |
| n exercises per workout | 73 | 1.280 | 0.238 | 2.321 | 0.016 | 0.04 | −0.10 | 0.17 | 0.59 | 0 (SE = 0.21) | NA% | 0% | 1.000 |
| Rest between exercise (min) | 56 | 2.086 | 0.096 | 4.075 | 0.04 | -0.36 | −1.40 | 0.68 | 0.50 | 0 (SE = 0.27) | NA% | 0% | 1.000 |
| n set per workout | 66 | 1.739 | 1.181 | 2.296 | <0.001 | -0.01 | −0.05 | 0.02 | 0.49 | 0 (SE = 0.20) | NA% | 0% | 1.000 |
| range repetitions | 72 | 1.199 | 0.335 | 2.064 | 0.007 | 0.05 | −0.07 | 0.17 | 0.38 | 0 (SE = 0.20) | NA% | 0% | 1.000 |
| Training duration (min) | 26 | 1.467 | −1.415 | 4.349 | 0.318 | 0.01 | −0.05 | 0.06 | 0.79 | 0 (SE = 0.47) | NA% | 0% | 1.000 |
| Average Intensity (%1RM) | 45 | 3.993 | −3.027 | 11.012 | 0.265 | -0.03 | −0.12 | 0.06 | 0.48 | 0 (SE = 0.26) | NA% | 0% | 1.000 |
| Lean Muscle Mass | |||||||||||||
| No covariables | 65 | 1.644 | 1.275 | 2.013 | <0.0001 | 0.03 (SE = 0.24) | 1% | 0.999 | |||||
| Participants Characteristics | |||||||||||||
| Age (years) | 54 | 1.020 | −1.964 | 4.005 | 0.5028 | 0.02 | −0.10 | 0.14 | 0.73 | 0.03 (SE = 0.33) | NA% | 1% | 0.996 |
| Weight (kg) | 60 | 4.870 | 0.002 | 9.739 | 0.0499 | −0.04 | −0.10 | 0.02 | 0.18 | 0 (SE = 0.25) | NA% | 0% | 1.000 |
| Height (m) | 49 | 0.107 | −6.453 | 6.666 | 0.9746 | 0.73 | −2.94 | 4.40 | 0.70 | 0 (SE = 0.33) | NA% | 0% | 1.000 |
| Training Status | 41 | 1.584 | 0.721 | 2.446 | 0.0003 | −0.15 | −0.66 | 0.36 | 0.57 | 0 (SE = 0.44) | NA% | 0% | 1.000 |
| Training Characteristics | |||||||||||||
| Study Durations (weeks) | 65 | 1.701 | 0.881 | 2.521 | <0.0001 | −0.01 | −0.08 | 0.07 | 0.87 | 0.04 (SE = 0.26) | 0.00 | 2% | 0.999 |
| Sessions | 65 | 1.860 | 1.087 | 2.633 | <0.0001 | −0.01 | −0.03 | 0.02 | 0.53 | 0.05 (SE = 0.26) | 0 | 2% | 0.999 |
| Days per week | 62 | 1.996 | −0.184 | 4.175 | 0.0727 | --0.13 | −0.84 | 0.58 | 0.72 | 0 (SE = 0.24) | NA% | 0% | 1.000 |
| n exercises per workout | 57 | 1.661 | 0.289 | 3.032 | 0.0176 | −0.01 | −0.18 | 0.16 | 0.92 | 0 (SE = 0.45) | NA% | 0% | 1.000 |
| Rest between exercise (min) | 54 | 1.458 | 0.279 | 2.636 | 0.0153 | 0.06 | −0.37 | 0.50 | 0.78 | 0 (SE = 0.26) | NA% | 0% | 1.000 |
| n set per workout | 46 | 2.082 | 1.417 | 2.748 | <0.0001 | −0.04 | −0.09 | 0.01 | 0.09 | 0 (SE = 0.29) | NA% | 0% | 1.000 |
| range repetitions | 44 | 0.601 | −1.874 | 3.076 | 0.6341 | 0.08 | −0.17 | 0.33 | 0.54 | 0 (SE = 0.43) | NA% | 0% | 1.000 |
| Training duration (min) | 9 | 1.256 | −1.867 | 4.379 | 0.4306 | 0.01 | −0.03 | 0.05 | 0.75 | 0 (SE = 1.61) | NA% | 0% | 0.998 |
| Average Intensity (%1RM) | 41 | 0.807 | −3.984 | 5.598 | 0.7413 | 0.01 | −0.05 | 0.07 | 0.77 | 0 (SE = 0.54) | NA% | 0% | 1.000 |
| Skeletal Mascle Mass | |||||||||||||
| No covariables | 11 | 1.11 | 0.519 | 1.709 | <0.001 | 0 (SE = 0.41) | 0% | 0.920 | |||||
| Participants Characteristics | |||||||||||||
| Age (years) | 11 | 1.5 | −7.901 | 10.901 | 0.755 | −0.017 | −0.424 | 0.391 | 0.936 | 0 (SE = 0.48) | NA% | 0% | 0.873 |
| Weight (kg) | 10 | −1.792 | −15.819 | 12.236 | 0.802 | 0.038 | −0.152 | 0.227 | 0.695 | 0 (SE = 0.56) | NA% | 0% | 0.863 |
| Height (m) | 10 | −3.23 | −41.849 | 35.385 | 0.870 | 2.37 | −19.223 | 23.964 | 0.830 | 0 (SE = 0.55) | NA% | 0% | 0.853 |
| Training Status | 8 | 2.448 | 0.418 | 4.478 | 0.018 | −0.893 | −2.259 | 0.474 | 0.201 | 0 (SE = 0.51) | NA% | 0% | 0.956 |
| Training Characteristics | |||||||||||||
| Study Durations (weeks) | 11 | 0.885 | −0.935 | 2.704 | 0.341 | 0.023 | −0.148 | 0.194 | 0.794 | 0 (SE = 0.44) | NA% | 0% | 0.878 |
| Sessions | 11 | 1.941 | −2.455 | 6.337 | 0.387 | −0.027 | −0.171 | 0.116 | 0.710 | 0 (SE = 0.48) | NA% | 0% | 0.884 |
| Days per week | 11 | 1.824 | −0.571 | 4.219 | 0.136 | −0.217 | −0.926 | 0.492 | 0.549 | 0 (SE = 0.44) | NA% | 0% | 0.900 |
| n exercises per workout | 11 | 3.197 | 0.25 | 6.143 | 0.034 | −0.305 | −0.728 | 0.118 | 0.157 | 0 (SE = 0.44) | NA% | 0% | 0.980 |
| Rest between exercise (min) | 11 | 0.719 | −0.657 | 2.095 | 0.306 | 0.141 | −0.301 | 0.583 | 0.532 | 0 (SE = 0.44) | NA% | 0% | 0.902 |
| n set per workout | 11 | 1.489 | 0.304 | 2.674 | 0.014 | −0.022 | −0.082 | 0.038 | 0.474 | 0 (SE = 0.45) | NA% | 0% | 0.910 |
| range repetitions | 7 | 3.056 | −8.385 | 14.497 | 0.601 | −0.247 | −1.593 | 1.1 | 0.720 | 0 (SE = 0.72) | NA% | 0% | 0.968 |
| Training duration (min) | |||||||||||||
| Average Intensity (%1RM) | |||||||||||||