How to track treadmill steps/distance in Health App

Due to weather conditions (lots of snow on the ground) I am starting to use a treadmill for walking. The treadmill (Nordictrack ProForm Pro 2000) will track my distance, calories burned, etc. but the company does not allow their software to sync to Apple Healthkit. I have an Apple Watch (first gen) but I don't swing my arms on the treadmill like I would when walking regularly so even though I start a workout on my watch I am not getting anywhere close to accurate information. I've tried indoor walk, indoor run, indoor cycle but the distance is way off.

I am looking for any solution to help get accurate distance and steps (calories would be nice too) while using my treadmill. I am open to purchasing an additional device if necessary.

Thanks in advance for any help!