Have you thought of looking at Lactate measurement as a measure of the anaerobiosis of the active muscles?

When performing maximal isometric force measurements the joint must be set at the optimal angle to produce maximal force. Depending upon the muscle or muscle group you are testing isometrically, you will need to look up optimal joint angles for such muscles. Ex. You will want to look up the optimal angle of the knee and the hip when testing the quadriceps.  As for dynamic, 60 degrees per second would be a proper speed to the test maximal dynamic force. When performing these two tests, if they are to be compared or used in the same study, it is best to use the same equipment for both if possible.

If you have one of the newer isokinetic dynamometers the machine can actually track your range of motion for you and will auto place the limb at the proper angle once it is set in the computer. 

Hi Arran, I suppose it depends what you want to use these measures for. Generally speaking if you want to utililse a measure of strength for some functional task index, then you would try to match up the parameters, i.e. is is static or dynamic, if dynamic is it concentric, eccentric or some combination and at what velocities of movement as we know from the force-velocity characteristics of muscle that this factor affects output. I agree also that you would consider the joint positions or if dynamic over which to examine the force/torque outputs. Another factor to consider perhaps is the load, such that if it is dynamic, is the functional load inertial, viscous etc as we know an isokinetic dynamometer doesn't mimic real life contractions