I'm trying to perform a tensile testing experiment on the Indirect Flight Muscle(IFM) of fruit fly (Drosophila melanogaster). The specimen in this case is a muscle fiber which is around 800 microns long and 100 microns thick. I've devised an apparatus for holding the muscle as well as measuring the elongation. It will be like putting up a muscle holding apparatus on a micrometer stage. Now, as I work onto it, I discovered that I'm short of ideas to apply force at such a small scale. The classical method of application of force by some direct method wouldn't work. Any suggestion on any type would be helpful.