Table 3.
Changes in Performance and Asymmetries After Unilateral Eccentric Overload Training With Different Strategies.
| SVW = SAME VOLUME, WEAKER LEG (n = 10) | DVW = DOUBLE VOLUME, WEAKER LEG (n = 11) | SVS = SAME VOLUME, STRONGER LEG (n = 14) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variables | PRE-TEST | POST-TEST | ES (CL90%) | p | PRE-TEST | POST-TEST | ES (CL90%) | p | PRE-TEST | POST-TEST | ES (CL90%) | p |
| ConMean stronger (W) | 439.30 (±169.02) | 747.22 (±203.79) | 1.49 (1.1; 1.87) | <0.01 | 493.06 (±211.14) | 807.29 (±200.33) | 1.07 (0.64; 1.5) | <0.01 | 427.44 (±124.88) | 648.45 (±178.59) | 1.16 (0.81; 1.5) | <0.01 |
| ConMean weaker (W) | 306.91 (±202.13) | 748.46 (±214.19) | 2.24 (1.74; 2.74) | <0.01 | 358.72 (±211.22) | 796.37 (±191.34) | 2.04 (1.45; 2.64) | <0.01 | 339.79 (±138.56) | 636.84 (±166.9) | 1.53 (1.22; 1.85) | <0.01 |
| ConMean asymmetry (%) | 32.9 (±37.08) | 7.84 (±5.38) | 0.89 (0.19; 1.58) | 0.04 | 32.56 (±36.35) | 13.7 (±9.99) | 0.43 (−0.15; 1.01) | 0.18 | 20.74 (±24.85) | 12.23 (±9.56) | 0.45 (−0.31; 1.2) | 0.54 |
| EccMean stronger (W) | 404.36 (±146.44) | 669.52 (±176.23) | 1.52 (1.15; 1.9) | <0.01 | 456.18 (±161.17) | 705.89 (±165.03) | 1.17 (0.71; 1.63) | <0.01 | 391.96 (±114.86) | 577.28 (±154.35) | 1.00 (0.71; 1.29) | <0.01 |
| EccMean weaker (W) | 344.28 (±138.17) | 667.14 (±178.9) | 1.97 (1.53; 2.4) | <0.01 | 443.38 (±165.13) | 656.93 (±131.9) | 1.08 (0.71; 1.45) | <0.01 | 367.91 (±114.39) | 581.17 (±148) | 1.16 (0.85; 1.47) | <0.01 |
| EccMean asymmetry (%) | 26.78 (±29.57) | 11.43 (±6.36) | 0.81 (−0.03; 1.65) | 0.19 | 19.61 (±16.58) | 13.65 (±6.23) | 0.01 (−1.02; 1.04) | 0.27 | 14.12 (±7.87) | 9.37 (±9.25) | 0.63 (−0.02; 1.28) | 0.24 |
| ConPeak stronger (W) | 788.95 (±307.85) | 1167.04 (±250.03) | 1.14 (0.68; 1.61) | <0.01 | 916.66 (±434.15) | 1348.97 (±322.06) | 0.92 (0.43; 1.4) | <0.01 | 717.06 (±195.93) | 1085.83 (±347.05) | 1.25 (0.83; 1.67) | <0.01 |
| ConPeak weaker (W) | 669.49 (±313.97) | 1217.9 (±302.24) | 1.63 (1.13; 2.14) | <0.01 | 872.23 (±447.98) | 1176.24 (±209.55) | 0.77 (0.33; 1.21) | 0.03 | 667.53 (±192.14) | 1072.01 (±368.35) | 1.33 (0.95; 1.71) | <0.01 |
| ConPeak asymmetry (%) | 32.02 (±28.36) | 6.47 (±4.94) | 1.6 (0.78; 2.41) | 0.01 | 20.63 (±16.33) | 16.43 (±11.28) | 0.07 (−0.81; 0.94) | 0.45 | 13.68 (±9.21) | 10.49 (±8.98) | 0.39 (−0.28; 1.06) | 0.44 |
| EccPeak stronger (W) | 938.72 (±427.89) | 1581.07 (±418.54) | 1.31 (0.77; 1.86) | <0.01 | 1034.55 (±436.39) | 1645.6 (±421.01) | 1.12 (0.68; 1.57) | <0.01 | 850.57 (±297.64) | 1311.17 (±466.67) | 1.08 (0.71; 1.45) | <0.01 |
| EccPeak weaker (W) | 834.25 (±397.72) | 1560.83 (±522.17) | 1.64 (1.18; 2.09) | <0.01 | 1010.49 (±450.81) | 1583.75 (±334.42) | 1.11 (0.72; 1.5) | <0.01 | 812.37 (±311.59) | 1311.07 (±451.86) | 1.19 (0.83; 1.56) | <0.01 |
| EccPeak asymmetry (%) | 27.32 (±29.6) | 14.36 (±11.17) | 0.34 (−0.46; 1.13) | 0.39 | 20.46 (±12.81) | 12.2 (±10.4) | 0.68 (0.09; 1.27) | 0.11 | 13.32 (±11.39) | 12.6 (±10.67) | 0.08 (−0.66; 0.82) | 0.89 |
Note: ConMean, mean concentric power output; EccMean, mean eccentric power; ConPeak, maximal peak concentric power output; EccPeak, maximal peak eccentric power output; ES, effect size; CL, confidence limit; SVW, unilateral eccentric overload training in the lateral squat performing the same volume with both limbs starting with the weaker limb; DVW, unilateral eccentric overload training in the lateral squat performing the double volume with the weaker limb starting with the weaker limb; SVS, unilateral eccentric overload training in the lateral squat performing the same volume with both limbs starting with the stronger limb. All results are presented in the same direction; that is, a positive change is considered an improvement, while a negative change is considered an impairment.