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Rate of force development as a measure of muscle damage
Author(s) -
Peñailillo L.,
Blazevich A.,
Numazawa H.,
Nosaka K.
Publication year - 2015
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/sms.12241
Subject(s) - concentric , isometric exercise , eccentric , cycling , medicine , muscle damage , cardiology , muscle contraction , physical medicine and rehabilitation , mathematics , physics , geometry , archaeology , quantum mechanics , history
This study tested the hypothesis that rate of force development ( RFD ) would be a more sensitive indirect marker of muscle damage than maximum voluntary isometric contraction ( MVC ) peak torque. Ten men performed one concentric cycling and two eccentric cycling ( ECC1 , ECC2 ) bouts for 30 min at 60% of maximal concentric power output with 2 weeks between bouts. MVC peak torque, RFD , and vastus lateralis electromyogram amplitude and mean frequency were measured during a knee extensor MVC before, immediately after and 1–2 days after each bout. The magnitude of decrease in MVC peak torque after exercise was greater ( P < 0.05) for ECC1 (11–25%) than concentric cycling (2–12%) and ECC2 (0–16%). Peak RFD and RFD from 0–30 ms, 0–50 ms, 0–100 ms, to 0–200 ms decreased ( P < 0.05) immediately after all cycling bouts without significant differences between bouts, but RFD at 100–200 ms interval ( RFD 100–200 ) decreased ( P < 0.05) at all time points after ECC 1 (24–32%) and immediately after ECC 2 (23%), but did not change after CONC . The magnitude of decrease in RFD 100–200 was 7–19% greater than that of MVC peak torque after ECC 1 ( P < 0.05). It is concluded that RFD 100–200 is a more specific and sensitive indirect marker of eccentric exercise‐induced muscle damage than MVC peak torque.