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Cited by 242Cardiovascular and exercise physiologySports Performance and TrainingMuscle metabolism and nutrition

Muscle power and metabolism in maximal intermittent exercise.

McCartney, N., Spriet, L. L., Heigenhauser, G. J., Kowalchuk, J. M., Sutton, J. R., Jones, N. L.·1986·Journal of Applied Physiology
DOI 10.1152/jappl.1986.60.4.1164
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Abstract

Muscle power and the associated metabolic changes in muscle were investigated in eight male human subjects who performed four 30-s bouts of maximal isokinetic cycling at 100 rpm, with 4-min recovery intervals. In the first bout peak power and total work were (mean +/- SE) 1,626 +/- 102 W and 20.83 +/- 1.18 kJ, respectively; muscle glycogen decreased by 18.2 mmol/kg wet wt, lactate increased to 28.9 +/- 2.7 mmol/kg, and there were up to 10-fold increases in glycolytic intermediates. External power and work decreased by 20% in both the second and third exercise periods, but no further change occurred in the fourth bout. Muscle glycogen decreased by an additional 14.8 mmol/kg after the second exercise and thereafter remained constant. Muscle adenosine triphosphate (ATP) was reduced by 40% from resting after each exercise period; creatine phosphate (CP) decreased successively to less than 5% of resting; in the recovery periods ATP and CP increased to 76 and 95% of initial resting levels, respectively. Venous plasma glycerol increased linearly to 485% of resting; free fatty acids did not change. Changes in muscle glycogen, lactate, and glycolytic intermediates suggested rate limitation at phosphofructokinase during the first and second exercise periods, and phosphorylase in the third and fourth exercise periods. Despite minimal glycolytic flux in the third and fourth exercise periods, subjects generated 1,000 W peak power and sustained 400 W for 30 s, 60% of the values recorded in the first exercise period.(ABSTRACT TRUNCATED AT 250 WORDS)

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Crossref · 10.1152/jappl.1986.60.4.1164

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  • Total work in healthy young males during cycling sprint interval training with four intervals of 30 s corresponds to an energy use of approximately 75 kcal.

    “Total work in healthy young males during cycling SIT with four intervals of 30 s corresponds to an energy use of ∼75 kcal (McCartney et al., 1986; Spriet et al., 1989), whereas during a session of MICT, such as running for 45 min at 75% MHR, a young healthy person weighing 70 kg uses 700 kcal.”

    From Effect of Exercise Training on Fat Loss—Energetic Perspectives and the Role of Improved Adipose Tissue Function and Body Fat Distribution (2021) · cites this paper as McCartney et al., 1986

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Authors
McCartney, N., Spriet, L. L., Heigenhauser, G. J., Kowalchuk, J. M., Sutton, J. R., & Jones, N. L.
ORCID
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
1986-04-01
Volume
60
Issue
4
Pages
1164-1169
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
DOI
10.1152/jappl.1986.60.4.1164
OpenAlex
W1859003939
Cited by
242
References
19
Citations by year
2026: 1 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 3 · 2021: 3 · 2020: 8 · 2019: 2 · 2018: 4 · 2017: 4 · 2016: 10 · 2015: 9 · 2014: 8 · 2013: 14 · 2012: 13
FWCI
7.58
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
muscle power, intermittent exercise, isokinetic cycling, muscle glycogen, lactate, glycolytic intermediates, phosphofructokinase, phosphorylase, ATP, phosphocreatine, plasma glycerol, free fatty acids, fatigue
MeSH terms
Acid-Base Equilibrium, Adenosine Triphosphate, Adult, Energy Metabolism, Physical Exertion, Glycerol, Glycogen, Glycolysis, Humans, Male, Muscle Contraction, Muscles, Oxygen Consumption, Phosphocreatine, Triglycerides

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