Abstract
The purpose of this study was to describe the activity of the quadriceps femoris during isokinetic eccentric activation. The subjects were 25 volunteer students (20–30 yr of age) in which both legs were analyzed (n = 50). Electromyographic (EMG) activity of the vastus medialis obliquus (VMO), rectus femoris (RF), and vastus lateralis (VL) was recorded with surface electrodes as subjects exerted a maximal eccentric activation at 30 deg/sec over three trials. There were no significant differences between the VMO, RF, and VL regarding onset, cessation, or duration of activity. Significant differences were found pertaining to EMG activity, rise time, and peak amplitude (p <.05). These results are clinically important in that the VMO is significantly more active than the RF and VL during an eccentric action; therefore, consideration to the VMO may be beneficial when rehabilitating the patient to return to functional activities.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 18-23 |
| Number of pages | 6 |
| Journal | Isokinetics and Exercise Science |
| Volume | 2 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1992 |
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Keywords
- Eccentric activation
- Emg
- Vastus medialis obliquus
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Biophysics
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Electromyographic analysis of the quadriceps femoris during isokinetic eccentric activation. / Fiebert, Ira; Hardy, Cheryl J.; Werner, Karee L.
In: Isokinetics and Exercise Science, Vol. 2, No. 1, 1992, p. 18-23.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electromyographic analysis of the quadriceps femoris during isokinetic eccentric activation
AU - Fiebert, Ira
AU - Hardy, Cheryl J.
AU - Werner, Karee L.
PY - 1992
Y1 - 1992
N2 - The purpose of this study was to describe the activity of the quadriceps femoris during isokinetic eccentric activation. The subjects were 25 volunteer students (20–30 yr of age) in which both legs were analyzed (n = 50). Electromyographic (EMG) activity of the vastus medialis obliquus (VMO), rectus femoris (RF), and vastus lateralis (VL) was recorded with surface electrodes as subjects exerted a maximal eccentric activation at 30 deg/sec over three trials. There were no significant differences between the VMO, RF, and VL regarding onset, cessation, or duration of activity. Significant differences were found pertaining to EMG activity, rise time, and peak amplitude (p <.05). These results are clinically important in that the VMO is significantly more active than the RF and VL during an eccentric action; therefore, consideration to the VMO may be beneficial when rehabilitating the patient to return to functional activities.
AB - The purpose of this study was to describe the activity of the quadriceps femoris during isokinetic eccentric activation. The subjects were 25 volunteer students (20–30 yr of age) in which both legs were analyzed (n = 50). Electromyographic (EMG) activity of the vastus medialis obliquus (VMO), rectus femoris (RF), and vastus lateralis (VL) was recorded with surface electrodes as subjects exerted a maximal eccentric activation at 30 deg/sec over three trials. There were no significant differences between the VMO, RF, and VL regarding onset, cessation, or duration of activity. Significant differences were found pertaining to EMG activity, rise time, and peak amplitude (p <.05). These results are clinically important in that the VMO is significantly more active than the RF and VL during an eccentric action; therefore, consideration to the VMO may be beneficial when rehabilitating the patient to return to functional activities.
KW - Eccentric activation
KW - Emg
KW - Vastus medialis obliquus
UR - http://www.scopus.com/inward/record.url?scp=84974744887&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84974744887&partnerID=8YFLogxK
U2 - 10.3233/IES-1992-2103
DO - 10.3233/IES-1992-2103
M3 - Article
VL - 2
SP - 18
EP - 23
JO - Isokinetics and Exercise Science
JF - Isokinetics and Exercise Science
SN - 0959-3020
IS - 1
ER -