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Does Eccentric-only and Concentric-only Activation Increase Power Output?
Med Sci Sports Exerc. 2020 02; 52(2):484-489.MS

Abstract

PURPOSE

The aim of study was to evaluate changes in power output and bar velocity in the bench press throw (BPT) following the bench press (BP) exercise as a conditioning activity (CA) with concentric only (CONONLY) and eccentric only (ECCONLY) contractions.

METHODS

Thirty-two (n = 32) healthy strength-trained men participated in this study (age, 28.4 ± 4.5 yr; height, 177 ± 7.6 cm; body mass, 93.5 ± 9.3 kg; BP one-repetition maximum (1RM), 143.6 ± 17.5 kg). The experiment was performed following a randomized crossover design, where each participant performed 2 sets of 2 repetitions using the BP exercise as the CA at 90% 1RM ECCONLY, 90% 1RM CONONLY, 110% 1RM ECCONLY, or 130% 1RM ECCONLY contraction. The BPT was performed to assess changes in peak power (PP), mean power (MP), and peak velocity (PV), mean velocity (MV) before and after CA. The differences between analyzed variables before and after the CA were verified using ANOVA with repeated measures. Statistical significance was set at P < 0.05.

RESULTS

There were statistically significant differences between baseline and postactivation value of PP and PV in the BPT (P < 0.05) after the CA with ECCONLY contraction at 110% 1RM and at 130% 1RM as well between baseline and postactivation value of MV in the BPT (P < 0.05) after CA with contraction at 110% 1RM. There were no significant differences between baseline and postactivation values of PP, MP, PV, and MV in the BPT after the CA with CONONLY contraction at 90% 1RM and CA with ECCONLY contraction at 90% 1RM.

CONCLUSIONS

Partial movement with ECCONLY contraction is effective in short-term power output development, but only when the load used in the CA exceeds 100% 1RM.

Authors+Show Affiliations

Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, POLAND.Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, POLAND.Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, POLAND.Center for Sports Performance, Department of Kinesiology, California State University, Fullerton, Fullerton, CA.Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, POLAND.Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, POLAND.

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31425385

Citation

Krzysztofik, Michal, et al. "Does Eccentric-only and Concentric-only Activation Increase Power Output?" Medicine and Science in Sports and Exercise, vol. 52, no. 2, 2020, pp. 484-489.
Krzysztofik M, Wilk M, Golas A, et al. Does Eccentric-only and Concentric-only Activation Increase Power Output? Med Sci Sports Exerc. 2020;52(2):484-489.
Krzysztofik, M., Wilk, M., Golas, A., Lockie, R. G., Maszczyk, A., & Zajac, A. (2020). Does Eccentric-only and Concentric-only Activation Increase Power Output? Medicine and Science in Sports and Exercise, 52(2), 484-489. https://doi.org/10.1249/MSS.0000000000002131
Krzysztofik M, et al. Does Eccentric-only and Concentric-only Activation Increase Power Output. Med Sci Sports Exerc. 2020;52(2):484-489. PubMed PMID: 31425385.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Does Eccentric-only and Concentric-only Activation Increase Power Output? AU - Krzysztofik,Michal, AU - Wilk,Michal, AU - Golas,Artur, AU - Lockie,Robert George, AU - Maszczyk,Adam, AU - Zajac,Adam, PY - 2019/8/20/pubmed PY - 2020/9/4/medline PY - 2019/8/20/entrez SP - 484 EP - 489 JF - Medicine and science in sports and exercise JO - Med Sci Sports Exerc VL - 52 IS - 2 N2 - PURPOSE: The aim of study was to evaluate changes in power output and bar velocity in the bench press throw (BPT) following the bench press (BP) exercise as a conditioning activity (CA) with concentric only (CONONLY) and eccentric only (ECCONLY) contractions. METHODS: Thirty-two (n = 32) healthy strength-trained men participated in this study (age, 28.4 ± 4.5 yr; height, 177 ± 7.6 cm; body mass, 93.5 ± 9.3 kg; BP one-repetition maximum (1RM), 143.6 ± 17.5 kg). The experiment was performed following a randomized crossover design, where each participant performed 2 sets of 2 repetitions using the BP exercise as the CA at 90% 1RM ECCONLY, 90% 1RM CONONLY, 110% 1RM ECCONLY, or 130% 1RM ECCONLY contraction. The BPT was performed to assess changes in peak power (PP), mean power (MP), and peak velocity (PV), mean velocity (MV) before and after CA. The differences between analyzed variables before and after the CA were verified using ANOVA with repeated measures. Statistical significance was set at P < 0.05. RESULTS: There were statistically significant differences between baseline and postactivation value of PP and PV in the BPT (P < 0.05) after the CA with ECCONLY contraction at 110% 1RM and at 130% 1RM as well between baseline and postactivation value of MV in the BPT (P < 0.05) after CA with contraction at 110% 1RM. There were no significant differences between baseline and postactivation values of PP, MP, PV, and MV in the BPT after the CA with CONONLY contraction at 90% 1RM and CA with ECCONLY contraction at 90% 1RM. CONCLUSIONS: Partial movement with ECCONLY contraction is effective in short-term power output development, but only when the load used in the CA exceeds 100% 1RM. SN - 1530-0315 UR - https://www.unboundmedicine.com/medline/citation/31425385/Does_Eccentric_only_and_Concentric_only_Activation_Increase_Power_Output L2 - https://doi.org/10.1249/MSS.0000000000002131 DB - PRIME DP - Unbound Medicine ER -