I would like to analyze gait cycles (running) - is there a smart way for cycle detection and calculation of the angles for each joint (average/maximum) for a certain amount of cycles - without writing a AMTLAB-routine?
The easiest would be to use a direct method (foot switch) or an accelerometer placed on the subject's foot.
Kinematic based methods were described by Zeni et al, but they were developed for walking and not running. Perhaps you could modify these methods to work with running analysis as well.
Given appropriate gait event detection (e. g. by foot switch or marker dynamics), you could use the software ProCalc which is supported by Vicon! Here you can extract joint angles (and many other gait parameters) per step cycle in an automated way.