Answer
Increase your stroke width to the wanted element width
Convert your stroke to a path
Give a new, narrower stroke to your new object and remove its fill. Ready.
See the following cartoon:
1 = the original stroke
2 = the wide stroke
3 = converted to path, the fill is removed, selected a narrow stroke
Attribution
Source : Link , Question Author : Arkadiusz Wieczorek , Answer Author : user287001