The relationship between peak torque and peak SEMG of the VM and SM during isokinetic knee flexion/extension

Item

Title
The relationship between peak torque and peak SEMG of the VM and SM during isokinetic knee flexion/extension
Author(s)
Hill Robert
Abstract
Background Data
Both the Cybex device and EMG have been used independently to determine muscle function. The Cybex device is a rehabilitation tool for sports injuries and analysis of muscle and joint function. Many studies have been performed investigating function in specific sports or injury groups, but not in a normative study group. EMG has been studied to establish muscle function patterns in various functional movements.
This study aimed to investigate the relationship of peak torque and peak muscular electrical signal in the vastus medialis and semimembranosus during knee flexion and extension during varied isokinetic speeds.
Setting
Exercise Physiology Laboratory, British College of Osteopathic Medicine, London NW3.
Subjects
Ten males were selected fitting the criteria:
Between the ages of 18-40
A student attending the British college of osteopathy (BCOM)
No medical complications
No history of knee or hip pain
Of sound body and mind
Method
Using the Cybex Norm Dynamometer measurements of peak torque were recorded during four isokinetic speeds (2400, 1800, 1200, 600) in flexion and extension of the right knee. As this was performed surface electrodes placed on the bellies of the vastus medialis and semimembranosus recorded muscular eletrical signal.
Results
The study expressed a pattern of increasing peak torque with decreasing isokinetic speed for both the vastus medialis (P<0.0001) and the semimembranosus (P<0.0001)
during knee flexion and extension. A repeated measures ANOVA test revealled a P value of P<0.0001 for both test muscles. A Tukeys's repeated measures test showed significance between all comparative speed peak torque values (P <0.0001) except 2400 vs. 1800 (P > 0.05) with semimembranosus. For vastus medialis 2400 vs. 600 and 1800 vs. 600 shared a P value < 0.001. 1200 vs.600 P<0.01 whilst the other comparative speed had no significance (P > 0.05). The EMG data showed no true trend with decreasing isokinetic speed not creating a significant change in EMG signal (P>0.05) for both the vastus medialis and semimembranosus. When the data was compared there was no true association only a suggestion that a trend may exist with more accurate data.
Conclusion
With the results the null hypothesis 'there is a relation between ISEMG with work and power' was not disproved. In conclusion there is no true trend between peak torque and peak muscle electrical signal with varying isokinetic speed during knee flexion and extension using the Cybex device. However, the data revealed a significant pattern with peak torque and decreasing speed. The study also suggested that the hypothesis may be true with more precise recording of SEMG.
presented at
British College of Osteopathic Medicine
Date Accepted
0
Date Submitted
1.1.1970 00:00:00
Type
osteo_thesis
Language
English
Submitted by:
62
Pub-Identifier
13670
Inst-Identifier
1076
Recommended
0
Item sets
Thesis

Hill Robert, “The relationship between peak torque and peak SEMG of the VM and SM during isokinetic knee flexion/extension”, Osteopathic Research Web, accessed May 5, 2025, https://www.osteopathicresearch.com/s/orw/item/1087