The intra- and inter-day reproducibility of the FitroDyne as a measure of multi-jointed muscle function

John F.T. Fernandes, Kevin L. Lamb, Craig Twist

Research output: Contribution to journalJournal Article

2 Citations (Scopus)

Abstract

BACKGROUND: The FitroDyne has been used to assess muscle function but its reproducibility has not been determined during traditional multi-jointed resistance exercises. OBJECTIVE: To assess the intra- and inter-day reproducibility of the FitroDyne during traditional resistance exercises. METHODS: Fourteen resistance trained males completed a one repetition maximum (1RM) and three repetitions of bench press, squat and bent-over-row in 10% increments (from 20 to 80%). Replica trials were completed two and 48 hours later. The FitroDyne rotary encoder measured barbell velocity during each repetition from which power output was calculated. RESULTS: For all loads and exercises the intra-day typical error (TE) for peak and mean power, and velocity, respectively, during bench press (8.2-53 W and 2.2-6.9 cm s-1), squat (13.3-55.6W and 2.4-7.4 cm s-1), and bent-over-row (14.5-62.8W and 4-10.5 cm s-1) identified only moderate changes. Bench press yielded poor intra-day reproducibility at 80% 1RM only (CV% = 12.2-17.1), whereas squat and bent-over-row across all loads for peak and mean power and velocity displayed better reproducibility CV% = 2.4-9.0). Inter-day, the TE detected moderate changes for peak and mean power and velocity for all three exercises. Inter-day reproducibility was comparable to intra-day, though improved for bench press 80% 1RM (CV% = 6.1-8.6). CONCLUSION: These data support the use of the FitroDyne at submaximal loads for monitoring moderate changes in muscle function both intra- and inter-day. © 2016 - IOS Press and the authors. All rights reserved.
Original languageEnglish
Pages (from-to)39-49
Number of pages11
JournalIsokinetics and Exercise Science
Volume24
Issue number1
DOIs
Publication statusPublished - 27 Feb 2016
Externally publishedYes

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Muscles

Keywords

  • Bench press
  • Bent-over-row
  • Power
  • Reliability
  • Squat
  • Velocity

Cite this

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title = "The intra- and inter-day reproducibility of the FitroDyne as a measure of multi-jointed muscle function",
abstract = "BACKGROUND: The FitroDyne has been used to assess muscle function but its reproducibility has not been determined during traditional multi-jointed resistance exercises. OBJECTIVE: To assess the intra- and inter-day reproducibility of the FitroDyne during traditional resistance exercises. METHODS: Fourteen resistance trained males completed a one repetition maximum (1RM) and three repetitions of bench press, squat and bent-over-row in 10{\%} increments (from 20 to 80{\%}). Replica trials were completed two and 48 hours later. The FitroDyne rotary encoder measured barbell velocity during each repetition from which power output was calculated. RESULTS: For all loads and exercises the intra-day typical error (TE) for peak and mean power, and velocity, respectively, during bench press (8.2-53 W and 2.2-6.9 cm s-1), squat (13.3-55.6W and 2.4-7.4 cm s-1), and bent-over-row (14.5-62.8W and 4-10.5 cm s-1) identified only moderate changes. Bench press yielded poor intra-day reproducibility at 80{\%} 1RM only (CV{\%} = 12.2-17.1), whereas squat and bent-over-row across all loads for peak and mean power and velocity displayed better reproducibility CV{\%} = 2.4-9.0). Inter-day, the TE detected moderate changes for peak and mean power and velocity for all three exercises. Inter-day reproducibility was comparable to intra-day, though improved for bench press 80{\%} 1RM (CV{\%} = 6.1-8.6). CONCLUSION: These data support the use of the FitroDyne at submaximal loads for monitoring moderate changes in muscle function both intra- and inter-day. {\circledC} 2016 - IOS Press and the authors. All rights reserved.",
keywords = "Bench press, Bent-over-row, Power, Reliability, Squat, Velocity",
author = "Fernandes, {John F.T.} and Lamb, {Kevin L.} and Craig Twist",
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The intra- and inter-day reproducibility of the FitroDyne as a measure of multi-jointed muscle function. / Fernandes, John F.T.; Lamb, Kevin L.; Twist, Craig.

In: Isokinetics and Exercise Science, Vol. 24, No. 1, 27.02.2016, p. 39-49.

Research output: Contribution to journalJournal Article

TY - JOUR

T1 - The intra- and inter-day reproducibility of the FitroDyne as a measure of multi-jointed muscle function

AU - Fernandes, John F.T.

AU - Lamb, Kevin L.

AU - Twist, Craig

PY - 2016/2/27

Y1 - 2016/2/27

N2 - BACKGROUND: The FitroDyne has been used to assess muscle function but its reproducibility has not been determined during traditional multi-jointed resistance exercises. OBJECTIVE: To assess the intra- and inter-day reproducibility of the FitroDyne during traditional resistance exercises. METHODS: Fourteen resistance trained males completed a one repetition maximum (1RM) and three repetitions of bench press, squat and bent-over-row in 10% increments (from 20 to 80%). Replica trials were completed two and 48 hours later. The FitroDyne rotary encoder measured barbell velocity during each repetition from which power output was calculated. RESULTS: For all loads and exercises the intra-day typical error (TE) for peak and mean power, and velocity, respectively, during bench press (8.2-53 W and 2.2-6.9 cm s-1), squat (13.3-55.6W and 2.4-7.4 cm s-1), and bent-over-row (14.5-62.8W and 4-10.5 cm s-1) identified only moderate changes. Bench press yielded poor intra-day reproducibility at 80% 1RM only (CV% = 12.2-17.1), whereas squat and bent-over-row across all loads for peak and mean power and velocity displayed better reproducibility CV% = 2.4-9.0). Inter-day, the TE detected moderate changes for peak and mean power and velocity for all three exercises. Inter-day reproducibility was comparable to intra-day, though improved for bench press 80% 1RM (CV% = 6.1-8.6). CONCLUSION: These data support the use of the FitroDyne at submaximal loads for monitoring moderate changes in muscle function both intra- and inter-day. © 2016 - IOS Press and the authors. All rights reserved.

AB - BACKGROUND: The FitroDyne has been used to assess muscle function but its reproducibility has not been determined during traditional multi-jointed resistance exercises. OBJECTIVE: To assess the intra- and inter-day reproducibility of the FitroDyne during traditional resistance exercises. METHODS: Fourteen resistance trained males completed a one repetition maximum (1RM) and three repetitions of bench press, squat and bent-over-row in 10% increments (from 20 to 80%). Replica trials were completed two and 48 hours later. The FitroDyne rotary encoder measured barbell velocity during each repetition from which power output was calculated. RESULTS: For all loads and exercises the intra-day typical error (TE) for peak and mean power, and velocity, respectively, during bench press (8.2-53 W and 2.2-6.9 cm s-1), squat (13.3-55.6W and 2.4-7.4 cm s-1), and bent-over-row (14.5-62.8W and 4-10.5 cm s-1) identified only moderate changes. Bench press yielded poor intra-day reproducibility at 80% 1RM only (CV% = 12.2-17.1), whereas squat and bent-over-row across all loads for peak and mean power and velocity displayed better reproducibility CV% = 2.4-9.0). Inter-day, the TE detected moderate changes for peak and mean power and velocity for all three exercises. Inter-day reproducibility was comparable to intra-day, though improved for bench press 80% 1RM (CV% = 6.1-8.6). CONCLUSION: These data support the use of the FitroDyne at submaximal loads for monitoring moderate changes in muscle function both intra- and inter-day. © 2016 - IOS Press and the authors. All rights reserved.

KW - Bench press

KW - Bent-over-row

KW - Power

KW - Reliability

KW - Squat

KW - Velocity

U2 - 10.3233/IES-150599

DO - 10.3233/IES-150599

M3 - Journal Article

VL - 24

SP - 39

EP - 49

JO - Isokinetics and Exercise Science

JF - Isokinetics and Exercise Science

SN - 0959-3020

IS - 1

ER -