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Differential effects of strength training leading to failure versus not to failure on hormonal responses, strength, and muscle power gains.
J Appl Physiol (1985). 2006 May; 100(5):1647-56.JA

Abstract

The purpose of this study was to examine the efficacy of 11 wk of resistance training to failure vs. nonfailure, followed by an identical 5-wk peaking period of maximal strength and power training for both groups as well as to examine the underlying physiological changes in basal circulating anabolic and catabolic hormones. Forty-two physically active men were matched and then randomly assigned to either a training to failure (RF; n = 14), nonfailure (NRF; n = 15), or control groups (C; n = 13). Muscular and power testing and blood draws to determine basal hormonal concentrations were conducted before the initiation of training (T0), after 6 wk of training (T1), after 11 wk of training (T2), and after 16 wk of training (T3). Both RF and NRF resulted in similar gains in 1-repetition maximum bench press (23 and 23%) and parallel squat (22 and 23%), muscle power output of the arm (27 and 28%) and leg extensor muscles (26 and 29%), and maximal number of repetitions performed during parallel squat (66 and 69%). RF group experienced larger gains in the maximal number of repetitions performed during the bench press. The peaking phase (T2 to T3) after NRF resulted in larger gains in muscle power output of the lower extremities, whereas after RF it resulted in larger gains in the maximal number of repetitions performed during the bench press. Strength training leading to RF resulted in reductions in resting concentrations of IGF-1 and elevations in IGFBP-3, whereas NRF resulted in reduced resting cortisol concentrations and an elevation in resting serum total testosterone concentration. This investigation demonstrated a potential beneficial stimulus of NRF for improving strength and power, especially during the subsequent peaking training period, whereas performing sets to failure resulted in greater gains in local muscular endurance. Elevation in IGFBP-3 after resistance training may have been compensatory to accommodate the reduction in IGF-1 to preserve IGF availability.

Authors+Show Affiliations

Studies, Research and Sport Medicine Center, Government of Navarra, Spain. mikel.izquierdo@ceimd.orgNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16410373

Citation

Izquierdo, Mikel, et al. "Differential Effects of Strength Training Leading to Failure Versus Not to Failure On Hormonal Responses, Strength, and Muscle Power Gains." Journal of Applied Physiology (Bethesda, Md. : 1985), vol. 100, no. 5, 2006, pp. 1647-56.
Izquierdo M, Ibañez J, González-Badillo JJ, et al. Differential effects of strength training leading to failure versus not to failure on hormonal responses, strength, and muscle power gains. J Appl Physiol (1985). 2006;100(5):1647-56.
Izquierdo, M., Ibañez, J., González-Badillo, J. J., Häkkinen, K., Ratamess, N. A., Kraemer, W. J., French, D. N., Eslava, J., Altadill, A., Asiain, X., & Gorostiaga, E. M. (2006). Differential effects of strength training leading to failure versus not to failure on hormonal responses, strength, and muscle power gains. Journal of Applied Physiology (Bethesda, Md. : 1985), 100(5), 1647-56.
Izquierdo M, et al. Differential Effects of Strength Training Leading to Failure Versus Not to Failure On Hormonal Responses, Strength, and Muscle Power Gains. J Appl Physiol (1985). 2006;100(5):1647-56. PubMed PMID: 16410373.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential effects of strength training leading to failure versus not to failure on hormonal responses, strength, and muscle power gains. AU - Izquierdo,Mikel, AU - Ibañez,Javier, AU - González-Badillo,Juan José, AU - Häkkinen,Keijo, AU - Ratamess,Nicholas A, AU - Kraemer,William J, AU - French,Duncan N, AU - Eslava,Jesus, AU - Altadill,Aritz, AU - Asiain,Xabier, AU - Gorostiaga,Esteban M, Y1 - 2006/01/12/ PY - 2006/1/18/pubmed PY - 2006/8/11/medline PY - 2006/1/18/entrez SP - 1647 EP - 56 JF - Journal of applied physiology (Bethesda, Md. : 1985) JO - J Appl Physiol (1985) VL - 100 IS - 5 N2 - The purpose of this study was to examine the efficacy of 11 wk of resistance training to failure vs. nonfailure, followed by an identical 5-wk peaking period of maximal strength and power training for both groups as well as to examine the underlying physiological changes in basal circulating anabolic and catabolic hormones. Forty-two physically active men were matched and then randomly assigned to either a training to failure (RF; n = 14), nonfailure (NRF; n = 15), or control groups (C; n = 13). Muscular and power testing and blood draws to determine basal hormonal concentrations were conducted before the initiation of training (T0), after 6 wk of training (T1), after 11 wk of training (T2), and after 16 wk of training (T3). Both RF and NRF resulted in similar gains in 1-repetition maximum bench press (23 and 23%) and parallel squat (22 and 23%), muscle power output of the arm (27 and 28%) and leg extensor muscles (26 and 29%), and maximal number of repetitions performed during parallel squat (66 and 69%). RF group experienced larger gains in the maximal number of repetitions performed during the bench press. The peaking phase (T2 to T3) after NRF resulted in larger gains in muscle power output of the lower extremities, whereas after RF it resulted in larger gains in the maximal number of repetitions performed during the bench press. Strength training leading to RF resulted in reductions in resting concentrations of IGF-1 and elevations in IGFBP-3, whereas NRF resulted in reduced resting cortisol concentrations and an elevation in resting serum total testosterone concentration. This investigation demonstrated a potential beneficial stimulus of NRF for improving strength and power, especially during the subsequent peaking training period, whereas performing sets to failure resulted in greater gains in local muscular endurance. Elevation in IGFBP-3 after resistance training may have been compensatory to accommodate the reduction in IGF-1 to preserve IGF availability. SN - 8750-7587 UR - https://www.unboundmedicine.com/medline/citation/16410373/Differential_effects_of_strength_training_leading_to_failure_versus_not_to_failure_on_hormonal_responses_strength_and_muscle_power_gains_ L2 - https://journals.physiology.org/doi/10.1152/japplphysiol.01400.2005?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -