Healthy, Muscle Quadriceps Femoris
Conditions
Keywords
Functionality, Deliberately, Activated, Quadriceps, Femoris, During, After, Active, Extension
Brief summary
Force enhancement (FE) describes the phenomenon of strength potentialization of a muscle cell or the complete muscle during and after active extension compared to the strength of an isometric contraction with same muscle length. The underlying physiological mechanism of this phenomenon is not completely known today. In vitro trials indicate that the interaction of an active and a passive component on the cellular level are responsible for the higher strength measurements. So far FE could be shown in vitro and in vivo on muscle fibers and small human muscles. Further research is needed for verification of the existence of FE in voluntary motor activity in everyday life. In order to approach this objective the investigators will scrutinize the functionality of the deliberately activated musculus (m) quadriceps femoris during and after active extension on the basis of in vivo studies.
Detailed description
The research proposal is resubmitted with no amendments made regarding content.
Interventions
OTHERmuscle activation
activation of the muscle quadriceps femoris
Sponsors
German Research Foundation
Study design
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
MALE
Age
20 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Males without previous muscular or neurophysiological diseases * Age between 20 and 40 years
Exclusion criteria
* Previous muscular or neurophysiological diseases
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Identification of a potential Force enhancement by complex muscle activity with a high relevance for everyday life, for example more agile leg stretching (knee bend). | 12 months |
Secondary
| Measure | Time frame |
|---|---|
| Evidence of existence of the force enhancement by deliberately activated, great human muscle by sub-maximal activation | 12 months |
| Correlation between typ of muscle fiber and force enhancement in vivo | 12 months |
| Analysis of the alternation of length of the muscle fiber during and after excentric extension for the differentiated explanation of in vivo mechanism excentric and post-excentric strength | 12 months |
Countries
Germany
Outcome results
None listed