User's Manual

Document MV0319P.N

MVN User Manual

Figure 31: Error generated if recording attempted without subject height and foot length.

In addition to these basic measurements, other body segment dimensions can be adjusted for subject-

specific anthropometry. The model-based values are presented between brackets, as Figure 30 shows,

e.g. Knee Height (48.6). The scaling model is based on the height of the subject without shoes. The

shoe sole height can be added as an offset to the feet. The height of the ankle joint will be adjusted

internally and other segment dimensions, such as the leg length, will not change. If the subject and ankle

height are measured with shoes on, all segment lengths will be scaled based on this length and the

shoe sole thickness should not be entered. However, for improved accuracy, it is advised to measure

height without shoes and insert the shoe height separately.

It is possible to provide values in either metric or imperial units. Metric units are active by default. To

switch to imperial units go to: Options >Preferences >Interface >User interface >‘Use imperial units

(inches)’.

The specific body segment dimensions are presented in Table 4. They can be found by palpating the

anatomical landmarks, presented in the figures on the next page and in the online video tutorials:

https://tutorial.xsens.com/video/body-measurements

Be careful! If you are not sure how to accurately measure the dimensions, do not change the default

values; the calculated values are generally accurate enough.

To scale the model with these dimensions, click ‘Apply’. The system will automatically update

dimensions for which no user input is provided.

The subject body dimensions can be saved to your computer as an MVN Actor (.MVNA) file which then

can be loaded the next time the same subject is used. After loading a subject file, it is still necessary to

perform a segment calibration. It is also possible to modify body dimensions and reprocess the file with

the new settings.