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Cited by 328Sports Performance and TrainingCardiovascular and exercise physiologyMuscle Physiology and Disorders

Muscle hypertrophy and fast fiber type conversions in heavy resistance-trained women.

Staron, R. S., Malicky, E. S., Leonardi, M. J., Falkel, J. E., Hagerman, F. C., Dudley, G. A.·1990·European Journal of Applied Physiology and Occupational Physiology
DOI 10.1007/bf00572189
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Abstract

Twenty-four women completed a 20-week heavy-resistance weight training program for the lower extremity. Workouts were twice a week and consisted of warm-up exercises followed by three sets each of full squats, vertical leg presses, leg extensions, and leg curls. All exercises were performed to failure using 6-8 RM (repetition maximum). Weight training caused a significant increase in maximal isotonic strength (1 RM) for each exercise. After training, there was a decrease in body fat percentage (p less than 0.05), and an increase in lean body mass (p less than 0.05) with no overall change in thigh girth. Biopsies were obtained before and after training from the superficial portion of the vastus lateralis muscle. Sections were prepared for histological and histochemical examination. Six fiber types (I, IC, IIC, IIA, IIAB, and IIB) were distinguished following routine myofibrillar adenosine triphosphatase histochemistry. Areas were determined for fiber types I, IIA, and IIAB + IIB. The heavy-resistance training resulted in significant hypertrophy of all three groups: I (15%), IIA (45%), and IIAB + IIB (57%). These data are similar to those in men and suggest considerable hypertrophy of all major fiber types is also possible in women if exercise intensity and duration are sufficient. In addition, the training resulted in a significant decrease in the percentage of IIB with a concomitant increase in IIA fibers, suggesting that strength training may lead to fiber conversions.

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Crossref · 10.1007/bf00572189

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  • Reduction in motor unit firing rate following resistance training could be explained by matching the motor unit firing rate with muscle contractile properties, such as a decrease in the proportion of type IIB fibers and increase in that of type IIA fibers following resistance training.

    “Therefore, reduction in the motor unit firing rate following resistance training could be explained by matching the motor unit firing rate with muscle contractile properties, such as a decrease in the proportion of type IIB fibers and increase in that of type IIA fibers following resistance training (Staron et al., 1990; Staron et al., 1994).”

    From Effect of resistance training and fish protein intake on motor unit firing pattern and motor function of elderly (2018) · cites this paper as Staron et al., 1990

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Authors
Staron, R. S., Malicky, E. S., Leonardi, M. J., Falkel, J. E., Hagerman, F. C., & Dudley, G. A.
Affiliations
Ohio University (US)
Venue
European Journal of Applied Physiology and Occupational Physiology
Publisher
Springer Science and Business Media LLC
Published
1990
Volume
60
Issue
1
Pages
71-79
ISSN
  • 0020-9376 (ISSN-L)
  • 0301-5548
  • 1439-6327
DOI
10.1007/bf00572189
OpenAlex
W2045443808
Cited by
328
References
74
Citations by year
2026: 6 · 2025: 2 · 2024: 6 · 2023: 8 · 2022: 7 · 2021: 8 · 2020: 13 · 2019: 8 · 2018: 8 · 2017: 8 · 2016: 9 · 2015: 13 · 2014: 12 · 2013: 13 · 2012: 17
FWCI
5.97
Type
journal article
Language
en
Open access
closed
Licence
www.springer.com/tdm (tdm)
Locations
  • European Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
muscle hypertrophy, resistance training, women, lower extremity, vastus lateralis, muscle fiber composition, type IIb muscle fibers, type IIA fibers, lean body mass, body fat percentage
MeSH terms
Adult, Body Composition, Female, Humans, Hypertrophy, Isotonic Contraction, Muscles, Physical Endurance, Weight Lifting

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