Training state affects plasma volume response to work at similar relative intensities

William Sullivan, Tina M. Manos, Bernard Gutin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

BACKGROUND: This study determined the difference in change in plasma volume between aerobically trained (T) and sedentary (UT) men cycling at a similar light and heavy relative metabolic work intensity. METHODS: Eight T and eight UT men performed one continuous cycling bout, first at approximately 45% VO2 peak and then at approximately 80% VO2 peak. Blood was drawn during supine and seated rest and after 10 minutes of cycling at each workrate. RESULTS: Arepeated measures ANOVArevealed an interaction (P<0.0001) between group and intensity on VO2 such that the increase in VO2 was progressively greater from the light (26.4±1.8 vs. 16.9±2.4 mL·min-1 · kg-1 for the Tand the UTgroup, respectively) to the heavy (46±3.6 vs. 29.1±4.3 mL · min-1 · kg-1 for the Tand the UTgroup, respectively) relative intensity for the Tthan for the UTgroup. There was a main effect of training status such that, when averaged across the light and heavy relative metabolic intensities, the relative decrease in plasma volume was greater (P=0.021) in the UT(12±7.7% and 19.6±3.8%, respectively) than in the T(6.5±2.9% and 14.1±3.7%, respectively) group. CONCLUSIONS: When cycling at similar relative metabolic work intensities, UTmen exhibit greater relative decreases in plasma volume than Tmen. Therefore, for aerobic endurance training, UTindividuals should be assigned a lighter relative metabolic work intensity than well-trained individuals.

Original languageEnglish
Pages (from-to)345-352
Number of pages8
JournalGazzetta Medica Italiana Archivio per le Scienze Mediche
Volume176
Issue number6
DOIs
StatePublished - 1 Jun 2017

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Plasma Volume
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Keywords

  • Oxygen consumption
  • Physical endurance
  • Physical exertion

Cite this

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title = "Training state affects plasma volume response to work at similar relative intensities",
abstract = "BACKGROUND: This study determined the difference in change in plasma volume between aerobically trained (T) and sedentary (UT) men cycling at a similar light and heavy relative metabolic work intensity. METHODS: Eight T and eight UT men performed one continuous cycling bout, first at approximately 45{\%} VO2 peak and then at approximately 80{\%} VO2 peak. Blood was drawn during supine and seated rest and after 10 minutes of cycling at each workrate. RESULTS: Arepeated measures ANOVArevealed an interaction (P<0.0001) between group and intensity on VO2 such that the increase in VO2 was progressively greater from the light (26.4±1.8 vs. 16.9±2.4 mL·min-1 · kg-1 for the Tand the UTgroup, respectively) to the heavy (46±3.6 vs. 29.1±4.3 mL · min-1 · kg-1 for the Tand the UTgroup, respectively) relative intensity for the Tthan for the UTgroup. There was a main effect of training status such that, when averaged across the light and heavy relative metabolic intensities, the relative decrease in plasma volume was greater (P=0.021) in the UT(12±7.7{\%} and 19.6±3.8{\%}, respectively) than in the T(6.5±2.9{\%} and 14.1±3.7{\%}, respectively) group. CONCLUSIONS: When cycling at similar relative metabolic work intensities, UTmen exhibit greater relative decreases in plasma volume than Tmen. Therefore, for aerobic endurance training, UTindividuals should be assigned a lighter relative metabolic work intensity than well-trained individuals.",
keywords = "Oxygen consumption, Physical endurance, Physical exertion",
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Training state affects plasma volume response to work at similar relative intensities. / Sullivan, William; Manos, Tina M.; Gutin, Bernard.

In: Gazzetta Medica Italiana Archivio per le Scienze Mediche, Vol. 176, No. 6, 01.06.2017, p. 345-352.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Training state affects plasma volume response to work at similar relative intensities

AU - Sullivan, William

AU - Manos, Tina M.

AU - Gutin, Bernard

PY - 2017/6/1

Y1 - 2017/6/1

N2 - BACKGROUND: This study determined the difference in change in plasma volume between aerobically trained (T) and sedentary (UT) men cycling at a similar light and heavy relative metabolic work intensity. METHODS: Eight T and eight UT men performed one continuous cycling bout, first at approximately 45% VO2 peak and then at approximately 80% VO2 peak. Blood was drawn during supine and seated rest and after 10 minutes of cycling at each workrate. RESULTS: Arepeated measures ANOVArevealed an interaction (P<0.0001) between group and intensity on VO2 such that the increase in VO2 was progressively greater from the light (26.4±1.8 vs. 16.9±2.4 mL·min-1 · kg-1 for the Tand the UTgroup, respectively) to the heavy (46±3.6 vs. 29.1±4.3 mL · min-1 · kg-1 for the Tand the UTgroup, respectively) relative intensity for the Tthan for the UTgroup. There was a main effect of training status such that, when averaged across the light and heavy relative metabolic intensities, the relative decrease in plasma volume was greater (P=0.021) in the UT(12±7.7% and 19.6±3.8%, respectively) than in the T(6.5±2.9% and 14.1±3.7%, respectively) group. CONCLUSIONS: When cycling at similar relative metabolic work intensities, UTmen exhibit greater relative decreases in plasma volume than Tmen. Therefore, for aerobic endurance training, UTindividuals should be assigned a lighter relative metabolic work intensity than well-trained individuals.

AB - BACKGROUND: This study determined the difference in change in plasma volume between aerobically trained (T) and sedentary (UT) men cycling at a similar light and heavy relative metabolic work intensity. METHODS: Eight T and eight UT men performed one continuous cycling bout, first at approximately 45% VO2 peak and then at approximately 80% VO2 peak. Blood was drawn during supine and seated rest and after 10 minutes of cycling at each workrate. RESULTS: Arepeated measures ANOVArevealed an interaction (P<0.0001) between group and intensity on VO2 such that the increase in VO2 was progressively greater from the light (26.4±1.8 vs. 16.9±2.4 mL·min-1 · kg-1 for the Tand the UTgroup, respectively) to the heavy (46±3.6 vs. 29.1±4.3 mL · min-1 · kg-1 for the Tand the UTgroup, respectively) relative intensity for the Tthan for the UTgroup. There was a main effect of training status such that, when averaged across the light and heavy relative metabolic intensities, the relative decrease in plasma volume was greater (P=0.021) in the UT(12±7.7% and 19.6±3.8%, respectively) than in the T(6.5±2.9% and 14.1±3.7%, respectively) group. CONCLUSIONS: When cycling at similar relative metabolic work intensities, UTmen exhibit greater relative decreases in plasma volume than Tmen. Therefore, for aerobic endurance training, UTindividuals should be assigned a lighter relative metabolic work intensity than well-trained individuals.

KW - Oxygen consumption

KW - Physical endurance

KW - Physical exertion

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DO - 10.23736/S0393-3660.16.03323-4

M3 - Article

AN - SCOPUS:85019621640

VL - 176

SP - 345

EP - 352

JO - Gazzetta Medica Italiana Archivio per le Scienze Mediche

JF - Gazzetta Medica Italiana Archivio per le Scienze Mediche

SN - 0393-3660

IS - 6

ER -