What does the zhe 着 after a verb do?
着 is used to express that something is in the status of a verb, so it should not be progressive. For example "sitting" is 坐着.

Examples:

他光着脚，手指弯曲着，失去了往日的力量。
His leg bared(baring), fingers bent(bending), gone his former strength.

Counter-examples:
您做着什么？ This one is invalid

The verb "do" is progressive(this action is changing), so 着 is not used here.