Evidence for muscle damage following variation in resistive force during concentric high intensity cycle ergometry exercise

body mass or composition?

Juien S. Baker, D. Hullin, B. Davies

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to compare power outputs, and concentrations of creatine kinase (S-CK), myoglobin (S-Mb) and blood lactate ([La-]b) following 30 s of maximal cycle ergometry exercise when resistive forces were dependent on total-body mass (TBM) and fat-free mass (FFM). Cardiac troponin concentrations (S-cTnl) were also determined to exclude protein leakage from the myocardium. Significant differences (P<0.05) in peak power output (PPO) were found between the TBM and FFM protocols (1020±134 vs. 953±114 Watts respectively). Differences were also found between pedal velocities and resistive forces (134±8 vs. 141±7 rev/min; 6±1 vs. 5±1 kg respectively). Significant differences were also noted for S-CK from rest to immediately post exercise during both the TBM and FFM protocols. Data for La-]b were also significantly different recorded from rest, to immediately post and 24 h post exercise for both the TBM and FFM protocols. Differences were observed immediately post exercise between the TBM and FFM protocols for S-Mb concentrations (P<0.05). The results of the study suggest that greater power outputs are obtainable with significantly less muscle damage when resistive forces reflect FFM mass during loading procedures.
Original languageEnglish
Pages (from-to)43-51
Number of pages9
JournalJournal of Exercise Physiology Online
Volume8
Issue number5
Publication statusPublished - 1 Aug 2005
Externally publishedYes

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Ergometry
Fats
Muscles
Myoglobin
Lactic Acid
Troponin
Creatine Kinase
Foot
Myocardium
Proteins

Cite this

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title = "Evidence for muscle damage following variation in resistive force during concentric high intensity cycle ergometry exercise: body mass or composition?",
abstract = "The purpose of this study was to compare power outputs, and concentrations of creatine kinase (S-CK), myoglobin (S-Mb) and blood lactate ([La-]b) following 30 s of maximal cycle ergometry exercise when resistive forces were dependent on total-body mass (TBM) and fat-free mass (FFM). Cardiac troponin concentrations (S-cTnl) were also determined to exclude protein leakage from the myocardium. Significant differences (P<0.05) in peak power output (PPO) were found between the TBM and FFM protocols (1020±134 vs. 953±114 Watts respectively). Differences were also found between pedal velocities and resistive forces (134±8 vs. 141±7 rev/min; 6±1 vs. 5±1 kg respectively). Significant differences were also noted for S-CK from rest to immediately post exercise during both the TBM and FFM protocols. Data for La-]b were also significantly different recorded from rest, to immediately post and 24 h post exercise for both the TBM and FFM protocols. Differences were observed immediately post exercise between the TBM and FFM protocols for S-Mb concentrations (P<0.05). The results of the study suggest that greater power outputs are obtainable with significantly less muscle damage when resistive forces reflect FFM mass during loading procedures.",
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Evidence for muscle damage following variation in resistive force during concentric high intensity cycle ergometry exercise : body mass or composition? / Baker, Juien S.; Hullin, D.; Davies, B.

In: Journal of Exercise Physiology Online, Vol. 8, No. 5, 01.08.2005, p. 43-51.

Research output: Contribution to journalArticle

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AB - The purpose of this study was to compare power outputs, and concentrations of creatine kinase (S-CK), myoglobin (S-Mb) and blood lactate ([La-]b) following 30 s of maximal cycle ergometry exercise when resistive forces were dependent on total-body mass (TBM) and fat-free mass (FFM). Cardiac troponin concentrations (S-cTnl) were also determined to exclude protein leakage from the myocardium. Significant differences (P<0.05) in peak power output (PPO) were found between the TBM and FFM protocols (1020±134 vs. 953±114 Watts respectively). Differences were also found between pedal velocities and resistive forces (134±8 vs. 141±7 rev/min; 6±1 vs. 5±1 kg respectively). Significant differences were also noted for S-CK from rest to immediately post exercise during both the TBM and FFM protocols. Data for La-]b were also significantly different recorded from rest, to immediately post and 24 h post exercise for both the TBM and FFM protocols. Differences were observed immediately post exercise between the TBM and FFM protocols for S-Mb concentrations (P<0.05). The results of the study suggest that greater power outputs are obtainable with significantly less muscle damage when resistive forces reflect FFM mass during loading procedures.

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