The present invention relates to a process and a system for monitoring exercise motions of a person. The process comprises monitoring a first sensor signal from the person. While the first sensor signal does not deviate from a first sensor signal template by more than a pre-determined amount, signals from further sensors from the person are monitored, compared to templates processing and the comparison result is evaluated. If unit sensor signals deviate from the templates by more than a pre-determined value this is communicated to the person.