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Effect of different types of conditioning contraction on upper body postactivation potentiation.
J Strength Cond Res. 2011 Jan; 25(1):143-8.JS

Abstract

Muscle contractions preceding an activity can result in increased force generation (postactivation potentiation [PAP]). Although the type of muscular contractions could affect subsequent strength and power performance, little information exists on their effects. The purpose of this study was to examine PAP effects produced by isometric (ISO), concentric (CON), eccentric (ECC), or concentric-eccentric (DYN) conditioning contractions on upper body force and power performance. Ten male, competitive rugby players (mean ± SD: age 20.4 ± 0.8 years, height 177.0 ± 8.1 cm, body mass 90.2 ± 13.8 kg) performed a ballistic bench press throw (BBPT) followed by a 10-minute rest and one of the conditioning contractions. After a 12-minute rest, the subjects performed another BBPT (post-BBPT). The conditioning contractions, applied on separate days and in counterbalanced randomized order, were a 7-second isometric barbell bench press for ISO and 1 set of 3 bench press repetitions at 3 repetition maximum for CON, ECC, and DYN (each repetition lasting 2 seconds for CON and ECC, overall execution time <7 seconds for DYN). Peak power (Ppeak), peak force (Fpeak), maximum distance (Dmax) and rate of force development (RFD) were measured using a linear position transducer. Electromyography (EMG) of the pectoralis major and triceps brachii was also recorded. The ISO produced significantly higher Ppeak (587 ± 116 and 605 ± 126 W for pre- and post-BBPT, respectively; p < 0.05). No significant differences in Ppeak were revealed for CON, ECC, and DYN (p > 0.05), and no significant differences existed in Fpeak, Dmax, and RFD for ISO, CON, ECC, and DYN (p > 0.05). Finally, EMG was not significantly different between pre- and post-BBPT for any of the conditioning contractions (p > 0.05). Isometric contractions appear to be the only conditioning contractions increasing upper body power output after long resting periods.

Authors+Show Affiliations

Cardiff School of Sport, University of Wales Institute, Cardiff, Cardiff, United Kingdom. jesformes@uwic.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

21157387

Citation

Esformes, Joseph I., et al. "Effect of Different Types of Conditioning Contraction On Upper Body Postactivation Potentiation." Journal of Strength and Conditioning Research, vol. 25, no. 1, 2011, pp. 143-8.
Esformes JI, Keenan M, Moody J, et al. Effect of different types of conditioning contraction on upper body postactivation potentiation. J Strength Cond Res. 2011;25(1):143-8.
Esformes, J. I., Keenan, M., Moody, J., & Bampouras, T. M. (2011). Effect of different types of conditioning contraction on upper body postactivation potentiation. Journal of Strength and Conditioning Research, 25(1), 143-8. https://doi.org/10.1519/JSC.0b013e3181fef7f3
Esformes JI, et al. Effect of Different Types of Conditioning Contraction On Upper Body Postactivation Potentiation. J Strength Cond Res. 2011;25(1):143-8. PubMed PMID: 21157387.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of different types of conditioning contraction on upper body postactivation potentiation. AU - Esformes,Joseph I, AU - Keenan,Matthew, AU - Moody,Jeremy, AU - Bampouras,Theodoros M, PY - 2010/12/16/entrez PY - 2010/12/16/pubmed PY - 2011/5/4/medline SP - 143 EP - 8 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 25 IS - 1 N2 - Muscle contractions preceding an activity can result in increased force generation (postactivation potentiation [PAP]). Although the type of muscular contractions could affect subsequent strength and power performance, little information exists on their effects. The purpose of this study was to examine PAP effects produced by isometric (ISO), concentric (CON), eccentric (ECC), or concentric-eccentric (DYN) conditioning contractions on upper body force and power performance. Ten male, competitive rugby players (mean ± SD: age 20.4 ± 0.8 years, height 177.0 ± 8.1 cm, body mass 90.2 ± 13.8 kg) performed a ballistic bench press throw (BBPT) followed by a 10-minute rest and one of the conditioning contractions. After a 12-minute rest, the subjects performed another BBPT (post-BBPT). The conditioning contractions, applied on separate days and in counterbalanced randomized order, were a 7-second isometric barbell bench press for ISO and 1 set of 3 bench press repetitions at 3 repetition maximum for CON, ECC, and DYN (each repetition lasting 2 seconds for CON and ECC, overall execution time <7 seconds for DYN). Peak power (Ppeak), peak force (Fpeak), maximum distance (Dmax) and rate of force development (RFD) were measured using a linear position transducer. Electromyography (EMG) of the pectoralis major and triceps brachii was also recorded. The ISO produced significantly higher Ppeak (587 ± 116 and 605 ± 126 W for pre- and post-BBPT, respectively; p < 0.05). No significant differences in Ppeak were revealed for CON, ECC, and DYN (p > 0.05), and no significant differences existed in Fpeak, Dmax, and RFD for ISO, CON, ECC, and DYN (p > 0.05). Finally, EMG was not significantly different between pre- and post-BBPT for any of the conditioning contractions (p > 0.05). Isometric contractions appear to be the only conditioning contractions increasing upper body power output after long resting periods. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/21157387/Effect_of_different_types_of_conditioning_contraction_on_upper_body_postactivation_potentiation_ L2 - https://doi.org/10.1519/JSC.0b013e3181fef7f3 DB - PRIME DP - Unbound Medicine ER -