How much stronger are muscles eccentrically than concentrically?
Meta-analysis of the influences of sex, age, joint action, and velocity
Keywords:strength, force, ratios, concentric, eccentric
For decades, researchers have observed that eccentric (ECC) muscle strength is greater than concentric (CON) strength. However, knowledge of the ECC:CON strength ratio is incomplete and might inform ECC exercise prescriptions. Our purposes were to determine the magnitude of the ECC:CON ratio and explore if sex, age, joint actions/exercises, and movement velocity impact it. A total of 1,393 ECC:CON ratios, aggregated from 11,477 individuals who made up 502 groups in 290 studies, were examined. Approximately 98% of measurements occurred on isokinetic machines. Bayesian meta-analyses were performed using log-ratios as response variables then exponentiated back to raw ratios. The overall main model estimate for the ECC:CON ratio was 1.41 [95% credible interval (CI): 1.38–1.44]. The ECC:CON ratio was slightly less in men (1.39 [CI: 1.35–1.42]) than women (1.46 [CI: 1.42–1.51]), but greater in older (1.65 [CI: 1.59–1.72]) than younger adults (1.38 [CI: 1.36–1.41]). The ratio was similar between grouped upper-body (1.43 [CI: 1.40–1.47]) and lower-body joint actions/exercises (1.40 [CI: 1.37–1.43]). However, heterogeneity in the ratio existed across joint actions/exercises, with point estimates ranging from 1.32 to 2.75. The ECC:CON ratio was mostly greatly impacted by movement velocity, with a 0.21% increase in the ratio for every 1°/s increase in velocity. The results show ECC strength is ~40% greater than CON strength. However, the ECC:CON ratio is greatly affected by movement velocity and to a lesser extent by age. Differences between joint actions/exercises likely exist but more data are needed to provide more precise estimates.
Doss WS, Karpovich PV. A comparison of concentric, eccentric, and isometric strenth of elbow flexors. J Appl Physiol. 1965;20(2):351-3.
Singh M, Karpovich PV. Strength of forearm flexors and extensors in men and women. J Appl Physiol. 1968;25(2):177-80.
Singh M, Karpovich PV. Isotonic and isometric forces of forearm flexors and extensors. J Appl Physiol. 1966;21(4):1435-7.
Colliander EB, Tesch PA. Bilateral eccentric and concentric torque of quadriceps and hamstring muscles in females and males. Eur J Appl Physiol Occup Physiol. 1989;59(3):227-32.
Griffin JW, Tooms RE, vander Zwaag R, Bertorini TE, O'Toole ML. Eccentric muscle performance of elbow and knee muscle groups in untrained men and women. Med Sci Sports Exerc. 1993;25(8):936-44.
Hollander DB, Kraemer RR, Kilpatrick MW, Ramadan ZG, Reeves GV, Francois M, et al. Maximal eccentric and concentric strength discrepancies between young men and women for dynamic resistance exercise. J Strength Cond Res. 2007;21(1):34-40.
Porter MM, Myint A, Kramer JF, Vandervoort AA. Concentric and eccentric knee extension strength in older and younger men and women. Can J Appl Physiol. 1995;20(4):429-39.
Damiano DL, Martellotta TL, Quinlivan JM, Abel MF. Deficits in eccentric versus concentric torque in children with spastic cerebral palsy. Med Sci Sports Exerc. 2001;33(1):117-22.
Marshall PW, Mannion J, Murphy BA. The eccentric, concentric strength relationship of the hamstring muscles in chronic low back pain. J Electromyogr Kinesiol. 2010;20(1):39-45.
Cowell JF, Cronin J, Brughelli M. Eccentric muscle actions and how the strength and conditioning specialist might use them for a variety of purposes. Strength Cond J. 2012;34(4):33-48.
Douglas J, Pearson S, Ross A, McGuigan M. Chronic adaptations to eccentric training: a systematic review. Sports Med. 2017;47(5):917-41.
Fisher JP, Ravalli S, Carlson L, Bridgeman LA, Roggio F, Scuderi S, et al. The "Journal of Functional Morphology and Kinesiology" journal club series: utility and advantages of the eccentric training through the isoinertial system. J Func Morphol Kinesiol. 2020;5(1).
Mike J, Kerksick CM, Kravitz L. How to incorporate eccentric training into a resistance training program. Strength Cond J. 2015;37(1):5-17.
Schoenfeld BJ, Grgic J. Eccentric overload training: a viable strategy to enhance muscle hypertrophy? Strength Cond J. 2018;40(2):78-81.
Suchomel TJ, Wagle JP, Douglas J, Taber CB, Harden M, Haff GG, et al. Implementing eccentric resistance training-part 2: practical recommendations. J Func Morphol Kinesiol. 2019;4(3).
Suchomel TJ, Wagle JP, Douglas J, Taber CB, Harden M, Haff GG, et al. Implementing eccentric resistance training-part 1: a brief review of existing methods. J Func Morphol Kinesiol. 2019;4(2).
Tinwala F, Cronin J, Haemmerle E, Ross A. Eccentric strength training: a review of the available technology. Strength Cond J. 2017;39(1):32-47.
Wagle JP, Taber CB, Cunanan AJ, Bingham GE, Carroll KM, DeWeese BH, et al. Accentuated eccentric loading for training and performance: a review. Sports Med. 2017;47(12):2473-95.
McNeill C, Beaven CM, McMaster DT, Gill N. Survey of eccentric-based strength and conditioning practices in sport. J Strength Cond Res. 2020;34(10):2769-75.
Harden M, Bruce C, Wolf A, Hicks KM, Howatson G. Exploring the practical knowledge of eccentric resistance training in high-performance strength and conditioning practitioners. Int J Sports Sci Coach. 2020;15(1):41-52.
Weldon A, Duncan MJ, Turner A, LaPlaca D, Sampaio J, Christie CJ. Practices of strength and conditioning coaches: a snapshot from different sports, countries, and expertise levels. J Strength Cond Res. 2022.
Nuzzo JL, Nosaka K. Comment on: “Stepwise load reduction training: a new training concept for skeletal muscle and energy systems”. Sports Med. 2022.
Durell DL, Pujol TJ, Barnes JT. A survey of the scientific data and training methods utilized by collegiate strength and conditioning coaches. J Strength Cond Res. 2003;17(2):368-73.
Judge LW, Petersen CB, Bellar DM, Craig BW, Cottingham MP, Gilreath EL. The current state of NCAA Division I collegiate strength facilities: size, equipment, budget, staffing, and football status. J Strength Cond Res. 2014;28(8):2253-61.
Greenhalgh T, Peacock R. Effectiveness and efficiency of search methods in systematic reviews of complex evidence: audit of primary sources. BMJ. 2005;331(7524):1064-5.
Gardner MJ, Altman DG. Confidence intervals rather than P values: estimation rather than hypothesis testing. BMJ. 1986;292(6522):746-50.
Kruschke JK, Liddell TM. The Bayesian New Statistics: hypothesis testing, estimation, meta-analysis, and power analysis from a Bayesian perspective. Psychon Bull Rev. 2018;25(1):178-206.
McShane BB, Gal D, Gelman A, Robert C, Tackett JL. Abandon statistical significance. The American Statistician. 2019;73:234-45.
Burkner P-C. brms: An R package for Bayesian multilevel models using Stan. J Stat Softw. 2017;80(1):1-28.
Kay M. tidybayes: Tidy data and geoms for Bayesian models. R package version 3.0. 0. . 2021.
Lenth RV. emmeans: Estimated Marginal Means, aka Least-Squares Means. R package version 1.6.1. . 2021.
Viechtbauer W. Conducting meta-analyses in R with the metafor package. J Stat Softw. 2010;36(3):1-48.
Wickham H, Chang W. An implementation of the grammar of graphics. 2016.
Pedersen TL. The composer of plots [R package patchwork version 1.1.1]. 2020.
Ren K, Russell K. formattable: Create 'Formattable' Data Structures. R package version 0.2.1. 2021.
Lajeunesse MJ. On the meta-analysis of response ratios for studies with correlated and multi-group designs. Ecology. 2011;92(11):2049-55.
Nakagawa S, Poulin R, Mengersen K, Reinhold K, Engqvist L, Lagisz M, et al. Meta-analysis of variation: ecological and evolutionary applications and beyond. Methods in Ecology and Evolution. 2015;6(2):143-52.
Nuzzo JL. Narrative review of sex differences in muscle strength, endurance, activation, size, fiber type; and strength training participation rates, preferences, motivations, injuries, and neuromuscular adaptations. J Strength Cond Res. In press.
Poulin MJ, Vandervoort AA, Paterson DH, Kramer JF, Cunningham DA. Eccentric and concentric torques of knee and elbow extension in young and older men. Can J Sport Sci. 1992;17(1):3-7.
Roig M, Macintyre DL, Eng JJ, Narici MV, Maganaris CN, Reid WD. Preservation of eccentric strength in older adults: Evidence, mechanisms and implications for training and rehabilitation. Exp Gerontol. 2010;45(6):400-9.
Hughes VA, Frontera WR, Wood M, Evans WJ, Dallal GE, Roubenoff R, et al. Longitudinal muscle strength changes in older adults: influence of muscle mass, physical activity, and health. J Gerontol A Biol Sci Med Sci. 2001;56(5):B209-B17.
Wu R, Delahunt E, Ditroilo M, Lowery M, De Vito G. Effects of age and sex on neuromuscular-mechanical determinants of muscle strength. Age 2016;38(3):57.
Drury B, Clarke H, Moran J, Fernandes JFT, Henry G, Behm DG. Eccentric resistance training in youth: a survey of perceptions and current practices by strength and conditioning coaches. J Func Morphol Kinesiol. 2021;6(1).
Tesch PA, Fernandez-Gonzalo R, Lundberg TR. Clinical Applications of Iso-Inertial, Eccentric-Overload (YoYo™) Resistance Exercise. Front Physiol. 2017;8:241.
Armstrong R, Baltzopoulos V, Langan-Evans C, Clark D, Jarvis J, Stewart C, et al. Determining concentric and eccentric force-velocity profiles during squatting. Eur J Appl Physiol. 2022;122(3):769-79.
Doan BK, Newton RU, Marsit JL, Triplett-McBride NT, Koziris LP, Fry AC, et al. Effects of increased eccentric loading on bench press 1RM. J Strength Cond Res. 2002;16(1):9-13.
Ojasto T, Häkkinen K. Effects of different accentuated eccentric load levels in eccentric-concentric actions on acute neuromuscular, maximal force, and power responses. J Strength Cond Res. 2009;23(3):996-1004.
Sheppard JM, Young K. Using additional eccentric loads to increase concentric performance in the bench throw. Journal Strength and Conditioning Research. 2010;24(10):2853-6.
Montalvo S, Gruber LD, Gonzalez MP, Dietze-Hermosa MS, Dorgo S. Effects of Augmented Eccentric Load Bench Press Training on One Repetition Maximum Performance and Electromyographic Activity in Trained Powerlifters. J Strength Cond Res. 2021;35(6):1512-9.
Sarto F, Franchi MV, Rigon PA, Grigoletto D, Zoffoli L, Zanuso S, et al. Muscle activation during leg-press exercise with or without eccentric overload. Eur J Appl Physiol. 2020;120(7):1651-6.
Wagle JP, Cunanan AJ, Carroll KM, Sams ML, Wetmore A, Bingham GE, et al. Accentuated Eccentric Loading and Cluster Set Configurations in the Back Squat: A Kinetic and Kinematic Analysis. J Strength Cond Res. 2021;35(2):420-7.
Wagle JP, Taber CB, Carroll KM, Cunanan AJ, Sams ML, Wetmore A, et al. Repetition-to-Repetition Differences Using Cluster and Accentuated Eccentric Loading in the Back Squat. Sports. 2018;6(3).
Coratella G, Milanese C, Schena F. Unilateral eccentric resistance training: A direct comparison between isokinetic and dynamic constant external resistance modalities. Eur J Sport Sci. 2015;15(8):720-6.
Godard MP, Wygand JW, Carpinelli RN, Catalano S, Otto RM. Effects of accentuated eccentric resistance training on concentric knee extensor strength. J Strength Cond Res. 1998;12(1):26-9.
Walker S, Blazevich AJ, Haff GG, Tufano JJ, Newton RU, Häkkinen K. Greater strength gains after training with accentuated eccentric than traditional isoinertial loads in already strength-trained men. Front Physiol. 2016;7:149.
Hortobágyi T, DeVita P. Favorable neuromuscular and cardiovascular responses to 7 days of exercise with an eccentric overload in elderly women. J Gerontol A Biol Sci Med Sci. 2000;55(8):B401-B10.
Friedmann-Bette B, Bauer T, Kinscherf R, Vorwald S, Klute K, Bischoff D, et al. Effects of strength training with eccentric overload on muscle adaptation in male athletes. Eur J Appl Physiol. 2010;108(4):821-36.
Brandenburg JP, Docherty D. The effects of accentuated eccentric loading on strength, muscle hypertrophy, and neural adaptations in trained individuals. J Strength Cond Res. 2002;16(1):25-32.
English KL, Loehr JA, Lee SM, Smith SM. Early-phase musculoskeletal adaptations to different levels of eccentric resistance after 8 weeks of lower body training. Eurorpean Journal of Applied Physiology. 2014;114(11):2263-80.
Tøien T, Pedersen Haglo H, Unhjem R, Hoff J, Wang E. Maximal strength training: the impact of eccentric overload. J Neurophysiol. 2018;120(6):2868-76.
Franchi MV, Ruoss S, Valdivieso P, Mitchell KW, Smith K, Atherton PJ, et al. Regional regulation of focal adhesion kinase after concentric and eccentric loading is related to remodelling of human skeletal muscle. Acta Physiol. 2018;223(3):e13056.
Seliger V, Dolejs L, Karas V, Pachlopníková I. Adaptation of trained athletes' energy expediture to repeated concentric and eccentric muscle contractions. Int Z Angew Physiol. 1968;26(3):227-34.
Schroeder ET, Hawkins SA, Jaque SV. Musculoskeletal adaptations to 16 weeks of eccentric progressive resistance training in young women. J Strength Cond Res. 2004;18(2):227-35.
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