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Cited by 261Sports Performance and TrainingCardiovascular and exercise physiologyMuscle activation and electromyography studies

Neuromuscular adaptations to concurrent strength and endurance training

McCARTHY, JOHN P., POZNIAK, MYRON A., AGRE, JAMES C.·2002·Medicine & Science in Sports & Exercise
DOI 10.1097/00005768-200203000-00019
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Abstract

PURPOSE: The purpose of this study was to examine muscle morphological and neural activation adaptations resulting from the interaction between concurrent strength and endurance training. METHODS: Thirty sedentary healthy male subjects were randomly assigned to one of three training groups that performed 10 wk of 3-d x wk(-1) high-intensity strength training (S), cycle endurance training (E), or concurrent strength and endurance training (CC). Strength, quadriceps-muscle biopsies, computed tomography scans at mid-thigh, and surface electromyogram (EMG) assessments were made before and after training. RESULTS: S and CC groups demonstrated similar increases (P < 0.0001) in both thigh extensor (12 and 14%) and flexor/adductor (7 and 6%) muscle areas. Type II myofiber areas similarly increased (P < 0.002) in both S (24%) and CC (28%) groups, whereas the increase (P < 0.004) in Type I area with S training (19%) was also similar to the nonsignificant (P = 0.041) increase with CC training (13%). Significant increases (P < 0.005) in maximal isometric knee-extension torque were accompanied by nonsignificant (P 0.38) in the EMG/torque relation across 20 to 100% maximal voluntary contractions occurred in any group. A small 3% increase (P < 0.01) in thigh extensor area was the only change in any of the above variables with E training. CONCLUSIONS: Findings indicate 3-d x wk(-1) concurrent performance of both strength and endurance training does not impair adaptations in strength, muscle hypertrophy, and neural activation induced by strength training alone. Results provide a physiological basis to support several performance studies that consistently indicate 3-d x wk(-1) concurrent training does not impair strength development over the short term.

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  • Cycling 3 days a week for 50 min at 70% VO2max was not enough to impair strength or hypertrophy as a result of concurrent strength training.

    “For example, in two separate studies McCarthy and colleagues showed that cycling 3 days a week for 50 min at 70 % VO2max was not enough to impair strength [4] or hypertrophy [5] as a result of concurrent strength training.”

    From Using Molecular Biology to Maximize Concurrent Training (2014) · cites this paper as [5]

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Authors
McCARTHY, J. P., POZNIAK, M. A., & AGRE, J. C.
Affiliations
University of Wisconsin–Madison (US)
ORCID
McCARTHY, JOHN P.
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2002-03
Volume
34
Issue
3
Pages
511-519
ISSN
0195-9131 (ISSN-L)
DOI
10.1097/00005768-200203000-00019
OpenAlex
W2033964545
Cited by
261
References
43
Citations by year
2026: 5 · 2025: 4 · 2024: 5 · 2023: 10 · 2022: 7 · 2021: 11 · 2020: 11 · 2019: 9 · 2018: 16 · 2017: 8 · 2016: 16 · 2015: 18 · 2014: 22 · 2013: 20 · 2012: 12
FWCI
4.43
Type
journal article
Language
en
Open access
closed
Locations
  • Medicine & Science in Sports & Exercise (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
  • Physical Sciences › Engineering › Biomedical Engineering › Muscle activation and electromyography studies
Keywords
concurrent training, resistance training, endurance training, muscle hypertrophy, neuronal activation, surface electromyography, knee extension torque, quadriceps, thigh muscle cross-sectional area, exercise frequency, strength development
MeSH terms
Adaptation, Physiological, Adult, Electromyography, Humans, Hypertrophy, Male, Physical Endurance, Tomography, X-Ray Computed, Exercise, Muscle, Skeletal, Muscle Fibers, Skeletal

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