There are two features that affect the resistance you will feel using the Vasa Ergometer, the flywheel and the damper door setting: The variable wind resistance of the flywheel simulates the resistance of water - the harder you pull, the more resistance you feel.
You can adjust the wind resistance by changing the opening of the damper door on the front of your Vasa Ergometer. The lowest setting “1” (door fully closed) provides the least resistance and the feel of swimming with a current or paddling downstream. The highest setting “7” (door fully open) provides the most resistance and the feel of swimming against a current or paddling upstream.
The damper setting affects the feel of your stroke, but does not directly affect the resistance. (Think of bicycle gears - setting “1” would be like the easiest gear on a bicycle and setting “7” would be the hardest gear.)

Tether Cords
The tether cords that come with the Vasa Ergometer are designed to prevent the seat from rolling too far forward. Tether cords come in 3 sizes: light (red), medium (blue) and hard (orange). Which tether cord you choose depends on the amount of power you will generate and the damper door setting you select. In general, as you increase the setting on the damper door, you would attach a harder tether cord. For example, if you set the damper door fully open at number 7 and wanted to do Butterfly intervals applying maximum force, then you would want to attach the hard tether cord.
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