Acute and delayed effects of concentric and eccentric exercise on quantitative muscle MRI

Szilvia A Nagy, Márk Váczi, Gábor Perlaki, Gergely Orsi, Zsolt Illés, Péter Bogner

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Background Advanced magnetic resonance imaging (MRI) is capable of identifying subtle effects of exercise. However, it is unclear whether it is sensitive enough to differentiate between different contractions. Purpose To compare the acute and delayed effects of concentric and eccentric exercise on quantitative MRI in hamstring muscles. Material and Methods Participants performed eccentric and concentric leg curls. Quantitative T2 and magnetization transfer ratio (MTR) maps were calculated in the hamstring complex before exercise, 30 minutes, 24 hours, 7 days, and 14 days after exercise. Results Compared to baseline, significant MTR reduction (-7.3%) and T2 elevation (72.2%) were observed in the semitendinosus muscle (ST) at 24 hours after eccentric exercise ( P = 0.04). Concentric contractions induced T2 elevation in the ST (20.8%) and biceps femoris (5.1%) muscles at 30 minutes after exercise ( P = 0.04) which normalized within 24 hours. Conclusions Longitudinal effects of concentric and eccentric exercise can be detected by both T2 and MTR, but T2 is more sensitive to subtle alterations.

Original languageEnglish
JournalActa Radiologica
Volume60
Issue number7
Pages (from-to)902-907
ISSN0284-1851
DOIs
Publication statusPublished - Jul 2019

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Muscles
Leg

Keywords

  • Quantitative MRI
  • T2 map
  • concentric exercise
  • eccentric exercise
  • magnetization transfer ratio (MTR)

Cite this

Nagy, Szilvia A ; Váczi, Márk ; Perlaki, Gábor ; Orsi, Gergely ; Illés, Zsolt ; Bogner, Péter. / Acute and delayed effects of concentric and eccentric exercise on quantitative muscle MRI. In: Acta Radiologica. 2019 ; Vol. 60, No. 7. pp. 902-907.
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abstract = "Background Advanced magnetic resonance imaging (MRI) is capable of identifying subtle effects of exercise. However, it is unclear whether it is sensitive enough to differentiate between different contractions. Purpose To compare the acute and delayed effects of concentric and eccentric exercise on quantitative MRI in hamstring muscles. Material and Methods Participants performed eccentric and concentric leg curls. Quantitative T2 and magnetization transfer ratio (MTR) maps were calculated in the hamstring complex before exercise, 30 minutes, 24 hours, 7 days, and 14 days after exercise. Results Compared to baseline, significant MTR reduction (-7.3{\%}) and T2 elevation (72.2{\%}) were observed in the semitendinosus muscle (ST) at 24 hours after eccentric exercise ( P = 0.04). Concentric contractions induced T2 elevation in the ST (20.8{\%}) and biceps femoris (5.1{\%}) muscles at 30 minutes after exercise ( P = 0.04) which normalized within 24 hours. Conclusions Longitudinal effects of concentric and eccentric exercise can be detected by both T2 and MTR, but T2 is more sensitive to subtle alterations.",
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Acute and delayed effects of concentric and eccentric exercise on quantitative muscle MRI. / Nagy, Szilvia A; Váczi, Márk; Perlaki, Gábor; Orsi, Gergely; Illés, Zsolt; Bogner, Péter.

In: Acta Radiologica, Vol. 60, No. 7, 07.2019, p. 902-907.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Acute and delayed effects of concentric and eccentric exercise on quantitative muscle MRI

AU - Nagy, Szilvia A

AU - Váczi, Márk

AU - Perlaki, Gábor

AU - Orsi, Gergely

AU - Illés, Zsolt

AU - Bogner, Péter

PY - 2019/7

Y1 - 2019/7

N2 - Background Advanced magnetic resonance imaging (MRI) is capable of identifying subtle effects of exercise. However, it is unclear whether it is sensitive enough to differentiate between different contractions. Purpose To compare the acute and delayed effects of concentric and eccentric exercise on quantitative MRI in hamstring muscles. Material and Methods Participants performed eccentric and concentric leg curls. Quantitative T2 and magnetization transfer ratio (MTR) maps were calculated in the hamstring complex before exercise, 30 minutes, 24 hours, 7 days, and 14 days after exercise. Results Compared to baseline, significant MTR reduction (-7.3%) and T2 elevation (72.2%) were observed in the semitendinosus muscle (ST) at 24 hours after eccentric exercise ( P = 0.04). Concentric contractions induced T2 elevation in the ST (20.8%) and biceps femoris (5.1%) muscles at 30 minutes after exercise ( P = 0.04) which normalized within 24 hours. Conclusions Longitudinal effects of concentric and eccentric exercise can be detected by both T2 and MTR, but T2 is more sensitive to subtle alterations.

AB - Background Advanced magnetic resonance imaging (MRI) is capable of identifying subtle effects of exercise. However, it is unclear whether it is sensitive enough to differentiate between different contractions. Purpose To compare the acute and delayed effects of concentric and eccentric exercise on quantitative MRI in hamstring muscles. Material and Methods Participants performed eccentric and concentric leg curls. Quantitative T2 and magnetization transfer ratio (MTR) maps were calculated in the hamstring complex before exercise, 30 minutes, 24 hours, 7 days, and 14 days after exercise. Results Compared to baseline, significant MTR reduction (-7.3%) and T2 elevation (72.2%) were observed in the semitendinosus muscle (ST) at 24 hours after eccentric exercise ( P = 0.04). Concentric contractions induced T2 elevation in the ST (20.8%) and biceps femoris (5.1%) muscles at 30 minutes after exercise ( P = 0.04) which normalized within 24 hours. Conclusions Longitudinal effects of concentric and eccentric exercise can be detected by both T2 and MTR, but T2 is more sensitive to subtle alterations.

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KW - T2 map

KW - concentric exercise

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KW - magnetization transfer ratio (MTR)

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