Concentric isokinetic resistance training and quadriceps femoris cross-sectional area

Dona J Housh, Terry J. Housh, Joseph P. Weir, Loree L. Weir, Patrick E. Donlin, Wei Kom Chu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The purposes of this study were to determine the effects of unilateral leg extension concentric isokinetic resistance (CIR) training on: (1) hypertrophy at the largest anatomical cross-section of the vastus intermedius, vastus lateralis, vastus medialis, and rectus femoris muscles in the trained and untrained limbs and (2) strength of the quadriceps femoris muscle group in the trained and untrained limbs. Sixteen untrained young adult males [mean age 24.7 ± 5.1 (SD) years] volunteered to serve as subjects. The subjects were divided into two groups: (1) training group (TG, n = 8) and (2) control group (CG, n = 8). The TG performed six sets of ten repetitions of extension of the non-dominant leg at 120°/s three times per week for 8 weeks on a Cybex II isokinetic dynamometer. The CG did not train. Pretraining and post-training leg extension peak torque at 120°/s and the largest anatomical cross-section of each muscle of the quadriceps femoris were determined utilizing a Cybex II dynamometer and magnetic resonance imaging scanner, respectively. The results indicated a significant (P < 0.05) increase (4.6%) in the CSA of the muscles of the non-dominant (trained) quadriceps femoris as well as significant (P < 0.05) increases in both non-dominant (trained) and dominant (untrained) quadriceps femoris strength (17.7 and 9.3%, respectively). There was no hypertrophy of the muscles of the dominant (untrained) limb. These data indicated that leg extension CIR training resulted in significant increases in both CSA and strength of the non-dominant (trained) quadriceps femoris as well as a significant increase in the strength, that was not accompanied by muscular hypertrophy, of the dominant (untrained) limb.

Original languageEnglish (US)
Pages (from-to)101-108
Number of pages8
JournalIsokinetics and Exercise Science
Volume6
Issue number2
StatePublished - Dec 1 1996

Fingerprint

Resistance Training
Quadriceps Muscle
Leg
Extremities
Hypertrophy
Muscles
Torque
Young Adult
Magnetic Resonance Imaging
Control Groups

Keywords

  • Anatomical cross-section
  • Concentric
  • Cross-training
  • Isokinetic
  • Magnetic resonance imaging

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Housh, D. J., Housh, T. J., Weir, J. P., Weir, L. L., Donlin, P. E., & Chu, W. K. (1996). Concentric isokinetic resistance training and quadriceps femoris cross-sectional area. Isokinetics and Exercise Science, 6(2), 101-108.

Concentric isokinetic resistance training and quadriceps femoris cross-sectional area. / Housh, Dona J; Housh, Terry J.; Weir, Joseph P.; Weir, Loree L.; Donlin, Patrick E.; Chu, Wei Kom.

In: Isokinetics and Exercise Science, Vol. 6, No. 2, 01.12.1996, p. 101-108.

Research output: Contribution to journalArticle

Housh, DJ, Housh, TJ, Weir, JP, Weir, LL, Donlin, PE & Chu, WK 1996, 'Concentric isokinetic resistance training and quadriceps femoris cross-sectional area', Isokinetics and Exercise Science, vol. 6, no. 2, pp. 101-108.
Housh, Dona J ; Housh, Terry J. ; Weir, Joseph P. ; Weir, Loree L. ; Donlin, Patrick E. ; Chu, Wei Kom. / Concentric isokinetic resistance training and quadriceps femoris cross-sectional area. In: Isokinetics and Exercise Science. 1996 ; Vol. 6, No. 2. pp. 101-108.
@article{3ce0d1e015964125bd1ef79149a50961,
title = "Concentric isokinetic resistance training and quadriceps femoris cross-sectional area",
abstract = "The purposes of this study were to determine the effects of unilateral leg extension concentric isokinetic resistance (CIR) training on: (1) hypertrophy at the largest anatomical cross-section of the vastus intermedius, vastus lateralis, vastus medialis, and rectus femoris muscles in the trained and untrained limbs and (2) strength of the quadriceps femoris muscle group in the trained and untrained limbs. Sixteen untrained young adult males [mean age 24.7 ± 5.1 (SD) years] volunteered to serve as subjects. The subjects were divided into two groups: (1) training group (TG, n = 8) and (2) control group (CG, n = 8). The TG performed six sets of ten repetitions of extension of the non-dominant leg at 120°/s three times per week for 8 weeks on a Cybex II isokinetic dynamometer. The CG did not train. Pretraining and post-training leg extension peak torque at 120°/s and the largest anatomical cross-section of each muscle of the quadriceps femoris were determined utilizing a Cybex II dynamometer and magnetic resonance imaging scanner, respectively. The results indicated a significant (P < 0.05) increase (4.6{\%}) in the CSA of the muscles of the non-dominant (trained) quadriceps femoris as well as significant (P < 0.05) increases in both non-dominant (trained) and dominant (untrained) quadriceps femoris strength (17.7 and 9.3{\%}, respectively). There was no hypertrophy of the muscles of the dominant (untrained) limb. These data indicated that leg extension CIR training resulted in significant increases in both CSA and strength of the non-dominant (trained) quadriceps femoris as well as a significant increase in the strength, that was not accompanied by muscular hypertrophy, of the dominant (untrained) limb.",
keywords = "Anatomical cross-section, Concentric, Cross-training, Isokinetic, Magnetic resonance imaging",
author = "Housh, {Dona J} and Housh, {Terry J.} and Weir, {Joseph P.} and Weir, {Loree L.} and Donlin, {Patrick E.} and Chu, {Wei Kom}",
year = "1996",
month = "12",
day = "1",
language = "English (US)",
volume = "6",
pages = "101--108",
journal = "Isokinetics and Exercise Science",
issn = "0959-3020",
publisher = "IOS Press",
number = "2",

}

TY - JOUR

T1 - Concentric isokinetic resistance training and quadriceps femoris cross-sectional area

AU - Housh, Dona J

AU - Housh, Terry J.

AU - Weir, Joseph P.

AU - Weir, Loree L.

AU - Donlin, Patrick E.

AU - Chu, Wei Kom

PY - 1996/12/1

Y1 - 1996/12/1

N2 - The purposes of this study were to determine the effects of unilateral leg extension concentric isokinetic resistance (CIR) training on: (1) hypertrophy at the largest anatomical cross-section of the vastus intermedius, vastus lateralis, vastus medialis, and rectus femoris muscles in the trained and untrained limbs and (2) strength of the quadriceps femoris muscle group in the trained and untrained limbs. Sixteen untrained young adult males [mean age 24.7 ± 5.1 (SD) years] volunteered to serve as subjects. The subjects were divided into two groups: (1) training group (TG, n = 8) and (2) control group (CG, n = 8). The TG performed six sets of ten repetitions of extension of the non-dominant leg at 120°/s three times per week for 8 weeks on a Cybex II isokinetic dynamometer. The CG did not train. Pretraining and post-training leg extension peak torque at 120°/s and the largest anatomical cross-section of each muscle of the quadriceps femoris were determined utilizing a Cybex II dynamometer and magnetic resonance imaging scanner, respectively. The results indicated a significant (P < 0.05) increase (4.6%) in the CSA of the muscles of the non-dominant (trained) quadriceps femoris as well as significant (P < 0.05) increases in both non-dominant (trained) and dominant (untrained) quadriceps femoris strength (17.7 and 9.3%, respectively). There was no hypertrophy of the muscles of the dominant (untrained) limb. These data indicated that leg extension CIR training resulted in significant increases in both CSA and strength of the non-dominant (trained) quadriceps femoris as well as a significant increase in the strength, that was not accompanied by muscular hypertrophy, of the dominant (untrained) limb.

AB - The purposes of this study were to determine the effects of unilateral leg extension concentric isokinetic resistance (CIR) training on: (1) hypertrophy at the largest anatomical cross-section of the vastus intermedius, vastus lateralis, vastus medialis, and rectus femoris muscles in the trained and untrained limbs and (2) strength of the quadriceps femoris muscle group in the trained and untrained limbs. Sixteen untrained young adult males [mean age 24.7 ± 5.1 (SD) years] volunteered to serve as subjects. The subjects were divided into two groups: (1) training group (TG, n = 8) and (2) control group (CG, n = 8). The TG performed six sets of ten repetitions of extension of the non-dominant leg at 120°/s three times per week for 8 weeks on a Cybex II isokinetic dynamometer. The CG did not train. Pretraining and post-training leg extension peak torque at 120°/s and the largest anatomical cross-section of each muscle of the quadriceps femoris were determined utilizing a Cybex II dynamometer and magnetic resonance imaging scanner, respectively. The results indicated a significant (P < 0.05) increase (4.6%) in the CSA of the muscles of the non-dominant (trained) quadriceps femoris as well as significant (P < 0.05) increases in both non-dominant (trained) and dominant (untrained) quadriceps femoris strength (17.7 and 9.3%, respectively). There was no hypertrophy of the muscles of the dominant (untrained) limb. These data indicated that leg extension CIR training resulted in significant increases in both CSA and strength of the non-dominant (trained) quadriceps femoris as well as a significant increase in the strength, that was not accompanied by muscular hypertrophy, of the dominant (untrained) limb.

KW - Anatomical cross-section

KW - Concentric

KW - Cross-training

KW - Isokinetic

KW - Magnetic resonance imaging

UR - http://www.scopus.com/inward/record.url?scp=0030455752&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030455752&partnerID=8YFLogxK

M3 - Article

VL - 6

SP - 101

EP - 108

JO - Isokinetics and Exercise Science

JF - Isokinetics and Exercise Science

SN - 0959-3020

IS - 2

ER -