That is fine.
You could also do the exercise intermittently, with periods of rest, and then poses. This is similar in concept to doing knee push-ups. You are still working the intended focus area and building your endurance and strength there in the process.
If those are too hard still, try something core centric, like standing knee raises where you squeeze the abs. Drop opposite elbow down while raising up the knee.

Rick
CoachNorthman