Your tiller will perform best if you adjust it to match the soil conditions.
Mid tine tillers can be used to till soil that had previously been tilled such as an existing garden & to mix in soil amendments.
The rotating tines on front-tine tillers pull the tiller along.
With this design, muscle power must be used to tip the tines into the soil to operate the machine.
This is physically strenuous and makes it difficult for some people to operate the mid-tine tillers.