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Maximal voluntary eccentric, isometric and concentric torque recovery following a concentric isokinetic exercise.
Int J Sports Med. 2003 Jan; 24(1):51-6.IJ

Abstract

To examine neuromuscular fatigue and recovery following an isokinetic fatiguing exercise, nine active females performed a fatiguing exercise comprising of ten sets of ten maximal concentric knee extensions. Before (pre-test), five minutes (post-test), 24 h and 48 h after the fatiguing exercise, maximal voluntary eccentric (-1.05 rad x s(-1); -2.09 rad x s(-1)), isometric (0 rad x s(-1)) and concentric (1.05 rad x s(-1); 2.09 rad x s(-1)) torque were measured. In order to distinguish central from peripheral factors involved in torque decrement, activation level (twitch interpolation technique) and twitch contractile properties were recorded. During the course of the fatiguing exercise, concentric torque was significantly lower during the 3rd set than pre-test (-5.6 +/- 12.3 %) and further decreased to the 10th (-10.3 +/- 9.5 %). Eccentric and isometric torques were significantly lower during post-test than pre-test (-16.8 +/- 8.8 % at -2.09 rad x s(-1), -15.1 +/- 7.4 % at -1.05 rad x s(-1), and -10.4 +/- 5.9 % at 0 rad x s(-1); p < 0.05), while concentric torque was not significantly modified. Voluntary activation, peak twitch torque, twitch maximal rates of force development and relaxation were also significantly declined (p < 0.05) at post-test. Twenty-four hours later, all the measured parameters were close to their pre-fatigue values. The present results reveal that the best way to test concentric-induced alteration of neuromuscular function was to use stressful testing conditions, such as eccentric contractions.

Authors+Show Affiliations

Groupe Analyse du Mouvement, UFR STAPS, Faculté des Sciences du Sport, Dijon, France. anne.michaut@insep.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article

Language

eng

PubMed ID

12582952

Citation

Michaut, A, et al. "Maximal Voluntary Eccentric, Isometric and Concentric Torque Recovery Following a Concentric Isokinetic Exercise." International Journal of Sports Medicine, vol. 24, no. 1, 2003, pp. 51-6.
Michaut A, Pousson M, Millet G, et al. Maximal voluntary eccentric, isometric and concentric torque recovery following a concentric isokinetic exercise. Int J Sports Med. 2003;24(1):51-6.
Michaut, A., Pousson, M., Millet, G., Belleville, J., & Van Hoecke, J. (2003). Maximal voluntary eccentric, isometric and concentric torque recovery following a concentric isokinetic exercise. International Journal of Sports Medicine, 24(1), 51-6.
Michaut A, et al. Maximal Voluntary Eccentric, Isometric and Concentric Torque Recovery Following a Concentric Isokinetic Exercise. Int J Sports Med. 2003;24(1):51-6. PubMed PMID: 12582952.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Maximal voluntary eccentric, isometric and concentric torque recovery following a concentric isokinetic exercise. AU - Michaut,A, AU - Pousson,M, AU - Millet,G, AU - Belleville,J, AU - Van Hoecke,J, PY - 2003/2/13/pubmed PY - 2003/5/29/medline PY - 2003/2/13/entrez SP - 51 EP - 6 JF - International journal of sports medicine JO - Int J Sports Med VL - 24 IS - 1 N2 - To examine neuromuscular fatigue and recovery following an isokinetic fatiguing exercise, nine active females performed a fatiguing exercise comprising of ten sets of ten maximal concentric knee extensions. Before (pre-test), five minutes (post-test), 24 h and 48 h after the fatiguing exercise, maximal voluntary eccentric (-1.05 rad x s(-1); -2.09 rad x s(-1)), isometric (0 rad x s(-1)) and concentric (1.05 rad x s(-1); 2.09 rad x s(-1)) torque were measured. In order to distinguish central from peripheral factors involved in torque decrement, activation level (twitch interpolation technique) and twitch contractile properties were recorded. During the course of the fatiguing exercise, concentric torque was significantly lower during the 3rd set than pre-test (-5.6 +/- 12.3 %) and further decreased to the 10th (-10.3 +/- 9.5 %). Eccentric and isometric torques were significantly lower during post-test than pre-test (-16.8 +/- 8.8 % at -2.09 rad x s(-1), -15.1 +/- 7.4 % at -1.05 rad x s(-1), and -10.4 +/- 5.9 % at 0 rad x s(-1); p < 0.05), while concentric torque was not significantly modified. Voluntary activation, peak twitch torque, twitch maximal rates of force development and relaxation were also significantly declined (p < 0.05) at post-test. Twenty-four hours later, all the measured parameters were close to their pre-fatigue values. The present results reveal that the best way to test concentric-induced alteration of neuromuscular function was to use stressful testing conditions, such as eccentric contractions. SN - 0172-4622 UR - https://www.unboundmedicine.com/medline/citation/12582952/Maximal_voluntary_eccentric_isometric_and_concentric_torque_recovery_following_a_concentric_isokinetic_exercise_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2003-37199 DB - PRIME DP - Unbound Medicine ER -