TY  - JOUR
A1  - Ben Othman, Aymen
A1  - Chaouachi, Anis
A1  - Chaouachi, Mehdi
A1  - Makhlouf, Issam
A1  - Farthing, Jonathan P.
A1  - Granacher, Urs
A1  - Behm, David George
T1  - Dominant and nondominant leg press training induce similar contralateral and ipsilateral limb training adaptations with children
JF  - Applied Physiology, Nutrition, and Metabolism
N2  - Cross-education has been extensively investigated with adults. Adult studies report asymmetrical cross-education adaptations predominately after dominant limb training. The objective of the study was to examine unilateral leg press (LP) training of the dominant or nondominant leg on contralateral and ipsilateral strength and balance measures. Forty-two youth (10-13 years) were placed (random allocation) into a dominant (n = 15) or nondominant (n = 14) leg press training group or nontraining control (n = 13). Experimental groups trained 3 times per week for 8 weeks and were tested pre-/post-training for ipsilateral and contralateral 1-repetition maximum (RM) horizontal LP, maximum voluntary isometric contraction (MVIC) of knee extensors (KE) and flexors (KF), countermovement jump (CMJ), triple hop test (THT), MVIC strength of elbow flexors (EF) and handgrip, as well as the stork and Y balance tests. Both dominant and nondominant LP training significantly (p < 0.05) increased both ipsilateral and contralateral lower body strength (LP 1RM (dominant: 59.6%-81.8%; nondominant: 59.5%-96.3%), KE MVIC (dominant: 12.4%-18.3%; nondominant: 8.6%-18.6%), KF MVIC (dominant: 7.9%-22.3%; nondominant: nonsignificant-3.8%), and power (CMJ: dominant: 11.1%-18.1%; nondominant: 7.7%-16.6%)). The exception was that nondominant LP training demonstrated a nonsignificant change with the contralateral KF MVIC. Other significant improvements were with nondominant LP training on ipsilateral EF 1RM (6.2%) and THT (9.6%). There were no significant changes with EF and handgrip MVIC. The contralateral leg stork balance test was impaired following dominant LP training. KF MVIC exhibited the only significant relative post-training to pretraining (post-test/pre-test) ratio differences between dominant versus nondominant LP cross-education training effects. In conclusion, children exhibit symmetrical cross-education or global training adaptations with unilateral training of dominant or nondominant upper leg.
KW  - resistance training
KW  - cross-education
KW  - youth
KW  - strength
KW  - power
KW  - balance
Y1  - 2019
U6  - https://doi.org/10.1139/apnm-2018-0766
SN  - 1715-5312
SN  - 1715-5320
VL  - 44
IS  - 9
SP  - 973
EP  - 984
PB  - NRC Research Press
CY  - Ottawa
ER  -