10.2 Recommended Maximum Voluntary Contraction (%MVC) in a single-posture analysis
The recommended Maximum Voluntary Contraction percentage (recommended %MVC) is used in Ergoniza Intelligent to adapt the individualized maximum isometric capacity to the duration and repetitiveness conditions specified by the user when working in Single Posture mode. Applying this percentage yields the Base Maximum Moment, which is used as a reference for assessing the exertion required by the posture.
The procedure depends on whether the exertion is momentary, sustained static, or repetitive. The user defines these conditions in the Repetitiveness dialog shown in Figure 42. This dialog opens from the Timing button on the left sidebar or from the clock-shaped button at the bottom of the Exertion panel shown in Figure 38.
Figure 42: Action duration and repetitiveness settings.
In Multiple Postures mode, an independent recommended %MVC is not calculated for each posture in the sequence. This mode uses a specific procedure based on the time course of the activity and, where applicable, on the 3CC-r Recommended Moment and cumulative load. The calculation of the 3CC-r Recommended Moment is explained in Section 10.4, while the separate procedure used to calculate cumulative exertion load is described in Section 10.3.
The following sections describe only the calculation of the recommended %MVC in Single Posture mode for momentary exertions, sustained static exertions, and repetitive tasks.