![background image](http://html.mh-extra.com/html/asviva/t21/t21_manual_2993462038.webp)
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HARDNESS GRADE
The treadmill offers you the possibility to set three different degrees of hardness.
Depending how you want to train on it. To change the settings move the switch to the wished
position.
We recommend this settings, depend on the running speed.
Setting
advised speed
Soft
0.8 - 6km/h
Normal
( middle setting )
6 - 10 km/h
Hard
10 - 12 km/h