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The torque-frequency relationship is impaired similarly following two bouts of eccentric exercise: No evidence of a protective repeated bout effect.

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Title: The torque-frequency relationship is impaired similarly following two bouts of eccentric exercise: No evidence of a protective repeated bout effect.
Authors: Hinks, Avery1 (AUTHOR), Hess, Adam1 (AUTHOR), Debenham, Mathew I.B.1,2 (AUTHOR), Chen, Jackey1 (AUTHOR), Mazara, Nicole1 (AUTHOR), Inkol, Keaton A.1 (AUTHOR), Cervone, Daniel T.1 (AUTHOR), Spriet, Lawrence L.1 (AUTHOR), Dalton, Brian H.2 (AUTHOR), Power, Geoffrey A.1 (AUTHOR) gapower@uoguelph.ca
Source: Journal of Biomechanics. Jun2021, Vol. 122, pN.PAG-N.PAG. 1p.
Subjects: Isokinetic exercise, Muscle contraction, Myalgia, Creatine kinase
Abstract: High-intensity eccentric exercise can lead to muscle damage and weakness. The 'repeated bout effect' (RBE) can attenuate these impairments when performing a subsequent bout. The influence of eccentric exercise-induced muscle damage on low-frequency force production is well-characterized; however, it is unclear how eccentric exercise and the RBE affect torque production across a range of stimulation frequencies (i.e., the torque-frequency relationship). We investigated the influence of an initial (Bout 1) and repeated bout (Bout 2) of eccentric exercise on the elbow flexor torque-frequency relationship. Eleven males completed two bouts of high-intensity eccentric elbow flexions, 4 weeks apart. Torque-frequency relationships were constructed at baseline and 0.5, 24, 48, 72, 96, and 168 h following both bouts via percutaneous stimulation at 1, 6, 10, 20, 30, 40, 50, and 100 Hz. Serum creatine kinase activity, self-reported muscle soreness, and isometric maximum voluntary contraction torque indirectly inferred the presence of muscle damage following Bout 1, and attenuation of muscle damage following Bout 2. Torque amplitude at all stimulation frequencies was impaired 30 min following eccentric exercise, however, torque at lower (1–10 Hz) and higher frequencies (40–100 Hz) recovered within 24 h while torque across the middle frequency range (20–30 Hz) recovered by 48 h. No between-bout differences were detected in absolute or normalized torque at any stimulation frequency, indicating no protective RBE on the elbow flexor torque-frequency relationship. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 150296391
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: The torque-frequency relationship is impaired similarly following two bouts of eccentric exercise: No evidence of a protective repeated bout effect.
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  Data: <searchLink fieldCode="AR" term="%22Hinks%2C+Avery%22">Hinks, Avery</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hess%2C+Adam%22">Hess, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Debenham%2C+Mathew+I%2EB%2E%22">Debenham, Mathew I.B.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Jackey%22">Chen, Jackey</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mazara%2C+Nicole%22">Mazara, Nicole</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Inkol%2C+Keaton+A%2E%22">Inkol, Keaton A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cervone%2C+Daniel+T%2E%22">Cervone, Daniel T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Spriet%2C+Lawrence+L%2E%22">Spriet, Lawrence L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dalton%2C+Brian+H%2E%22">Dalton, Brian H.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Power%2C+Geoffrey+A%2E%22">Power, Geoffrey A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gapower@uoguelph.ca</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Biomechanics%22">Journal of Biomechanics</searchLink>. Jun2021, Vol. 122, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Isokinetic+exercise%22">Isokinetic exercise</searchLink><br /><searchLink fieldCode="DE" term="%22Muscle+contraction%22">Muscle contraction</searchLink><br /><searchLink fieldCode="DE" term="%22Myalgia%22">Myalgia</searchLink><br /><searchLink fieldCode="DE" term="%22Creatine+kinase%22">Creatine kinase</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-intensity eccentric exercise can lead to muscle damage and weakness. The 'repeated bout effect' (RBE) can attenuate these impairments when performing a subsequent bout. The influence of eccentric exercise-induced muscle damage on low-frequency force production is well-characterized; however, it is unclear how eccentric exercise and the RBE affect torque production across a range of stimulation frequencies (i.e., the torque-frequency relationship). We investigated the influence of an initial (Bout 1) and repeated bout (Bout 2) of eccentric exercise on the elbow flexor torque-frequency relationship. Eleven males completed two bouts of high-intensity eccentric elbow flexions, 4 weeks apart. Torque-frequency relationships were constructed at baseline and 0.5, 24, 48, 72, 96, and 168 h following both bouts via percutaneous stimulation at 1, 6, 10, 20, 30, 40, 50, and 100 Hz. Serum creatine kinase activity, self-reported muscle soreness, and isometric maximum voluntary contraction torque indirectly inferred the presence of muscle damage following Bout 1, and attenuation of muscle damage following Bout 2. Torque amplitude at all stimulation frequencies was impaired 30 min following eccentric exercise, however, torque at lower (1–10 Hz) and higher frequencies (40–100 Hz) recovered within 24 h while torque across the middle frequency range (20–30 Hz) recovered by 48 h. No between-bout differences were detected in absolute or normalized torque at any stimulation frequency, indicating no protective RBE on the elbow flexor torque-frequency relationship. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jbiomech.2021.110448
    Languages:
      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Isokinetic exercise
        Type: general
      – SubjectFull: Muscle contraction
        Type: general
      – SubjectFull: Myalgia
        Type: general
      – SubjectFull: Creatine kinase
        Type: general
    Titles:
      – TitleFull: The torque-frequency relationship is impaired similarly following two bouts of eccentric exercise: No evidence of a protective repeated bout effect.
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            – D: 09
              M: 06
              Text: Jun2021
              Type: published
              Y: 2021
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