Figure 5From: Assessment of skeletal muscle fatigue of road maintenance workers based on heart rate monitoring and myotonometryIllustration of frequency changing in separate muscle groups while performing the different kind of work at the beginning and at the end of the work week – for workers who are not to be able to adapt with the workload and whose muscle frequency exceeds the norm (11 up to 16 Hz, exist for each muscle individually) after the work week cycle.Back to article page