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. 2020 Mar 14;8(3):34. doi: 10.3390/sports8030034

Table 2.

Correlation matrix between jumps, strength, and sprint variables obtained after the assessments in male rugby players.

Variables Correlations
Jumps Strength RST Loads Unresisted and RST Times
CMJ SJ 1RM-SQ 1RM-SQrel ISQTrel ISQT L10% L30% L50% VMAX T30 T30-20BM T30-40BM T30-60BM
SJ 0.905 ** - - - - - - - - - - - - -
1RM-SQ −0.186 −0.262 - - - - - - - - - - - -
1RM-SQrel 0.510 * 0.345 0.501 * - - - - - - - - - - -
ISQTrel 0.198 −0.014 0.605 ** 0.633 ** - - - - - - - - - -
ISQT 0.132 −0.116 0.761 ** 0.423 0.868 ** - - - - - - - - -
L10% 0.362 0.566 ** −0.369 −0.043 −0.444 −0.553 * - - - - - - - -
L30% 0.370 0.446 * −0.146 0.073 −0.143 −0.302 0.712 ** - - - - - - -
L50% 0.336 0.370 −0.159 0.097 −0.128 −0.204 0.564 ** 0.981 ** - - - - - -
VMAX 0.747 ** 0.795 ** −0.170 0.447 * −0.014 −0.209 0.559 * 0.324 0.228 - - - - -
T30 −0.734 ** −0.787 ** 0.084 −0.534 * 0.059 0.168 −0.560 * −0.342 −0.249 −0.977 ** - - - -
T30-20BM −0.671 ** −0.744 ** 0.090 −0.379 0.053 0.307 −0.724 ** −0.414 −0.288 −0.944 ** 0.933 ** - - -
T30-40BM −0.688 ** -0.645 ** 0.183 −0.362 0.036 0.241 −0.638 ** −0.399 −0.409 −0.709 ** 0.691 ** 0.776 ** - -
T30−60BM −0.655 ** −0.728 ** 0.210 −0.336 −0.059 0.279 −0.672 ** −0.633 ** −0.561 * −0.839 ** 0.800 ** 0.787 ** 0.695 ** -
T30-80BM −0.833 ** −0.689 ** 0.153 −0.340 −0.028 0.126 −0.482 * −0.485 * −0.505 * −0.761 ** 0.680 ** 0.815 ** 0.675 ** 0.638 **

* Correlation is significant at the 0.05 level. ** Correlation is significant at the 0.01 level. BM: body mass; CMJ: countermovement jump; SJ: squat jump; 1RM-SQ: 1 RM estimated in the squat exercise; 1RM-SQrel: 1RM relative to BM; ISQTrel: isometric squat test relative to body mass; ISQT: isometric squat test; L10%: load needed to reach a 10% velocity loss; L30%: load needed to reach a 30% velocity loss; L50%: load needed to reach a 50% velocity loss; Vmax: maximum velocity reached in the unloaded condition. T30: unresisted 30 m sprint times; T30-20BM: 30 m sprint times during sled towing with 20% BM; T30-40BM: 30 m sprint times during sled towing with 40% BM; T30-60BM: 30 m sprint times during sled towing with 60% BM; T30-80BM: 30 m sprint times during sled towing with 80% BM.