Your body/capability to work is labor.
Property that you can use to produce value beyond itself through workers' labor is capital.
Property that you can use to produce value beyond itself through workers' labor is capital.
Suppose you had a robot. Would that robot be labor or capital? Assume the robot has the same capability for work as you.
At the end of the day it is a machine, so "capital". Likewise you own your body, it is your capital.