OW VJ Height | Comparison Group VJ Height | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
n | Pretraining (cm) | Post-training (cm) | Per cent change | n | Pretraining (cm) | Post-training (cm) | Per cent change | Per cent change (diff b/w groups) | Effect size (SE) | 95% CI of Effect Size | p Value | |
Control | ||||||||||||
Arabatzi et al34 | 9 | 34.6±7.5 | 39.8±6.8 | 15.0 | 8 | 33.3±5.2 | 35.2±5.8 | 5.7 | 9.3 | 0.52 (0.49) | −0.45 to 1.49 | 0.13 |
Tricoli et al31 | 7 | 42.2±2.1 | 45.0±2.6 | 6.6 | 7 | 42.2±4.9 | 42.6±5.2 | 0.1 | 6.5 | 0.58 (0.55) | −0.49 to 1.65 | 0.28 |
Channell and Barfield28 | 11 | 57.5±7.2 | 60.1±3.9 | 4.5 | 6 | 59.1±9.1 | 57.4±7.7 | −2.9 | 7.4 | 0.79 (0.53) | −0.24 to 1.82 | 0.29 |
Mean effect | 8.7 | 1.0 | 7.7 | 0.62 (0.30) | 0.04 to 1.22 | 0.03 | ||||||
Traditional resistance training | ||||||||||||
Arabatzi and Kellis33 | 9 | 34.6±7.5 | 39.8±6.8 | 15.0 | 9 | 31.3±2 | 33.4±3.0 | 6.7 | 8.3 | 0.58 (0.48) | −0.36 to 1.53 | 0.23 |
Hoffman et al35 | 10 | 44.2±2.1 | 46.8±6.1 | 5.9 | 10 | 40.8±8.9 | 40.5±6.8 | −0.7 | 6.6 | 0.45 (0.45) | −0.44 to 1.34 | 0.32 |
Channell and Barfield28 | 11 | 57.5±7.2 | 60.1±3.9 | 4.5 | 10 | 47.2±9.5 | 48.3±8.9 | 2.3 | 2.2 | 0.22 (0.44) | −0.64 to 1.08 | 0.61 |
Scherfenberg and Burns36 | 55 | 57.9±11.8 | 60.6±3.0 | 4.7 | 58 | 57.4±12.3 | 58.1±2.2 | 1.2 | 3.5 | 0.77 (0.20) | 0.39 to 1.16 | <0.01 |
Mean effect | 7.5 | 2.4 | 5.1 | 0.64 (0.16) | 0.34 to 0.95 | <0.01 | ||||||
Plyometric training | ||||||||||||
Arabatzi et al34 | 9 | 34.6±7.5 | 39.8±6.8 | 15.0 | 9 | 31.5±6.3 | 36.1±6.4 | 14.6 | 0.4 | 0.09 (0.47) | 0.22 to −0.84 | 0.19 |
Tricoli et al31 | 7 | 42.2±2.1 | 45.0±2.6 | 6.6 | 8 | 40.2±3.9 | 42.5±3.0 | 5.7 | 0.9 | 0.18 (0.52) | 0.27 to −0.84 | 0.34 |
Moore et al30 | 8 | 47.3±16.4 | 51.5±21.2 | 8.9 | 7 | 41.4±10.0 | 44.2±11.1 | 6.7 | 2.2 | 0.08 (0.52) | 0.26 to −0.93 | 0.16 |
Mean effect | 10.2 | 9.0 | 1.2 | 0.11 (0.29) | −0.08 to −0.45 | 0.39 |
Pretraining and post-training values are presented as mean±SD.
% change=post-training minus pretraining VJ height, divided pretraining VJ height, multiplied by 100.
% change (diff b/w groups)=% change VJ height (OW) minus % change VJ height (comparison group).
Effect size (ES) and 95% CIs values from random effects model.
Statistical significance is accepted as p≤0.05.
b/w, between; diff, difference; OW, Olympic weightlifting; VJ, vertical jump.