Not able to get Resting Heart Rate value from Samsung Health SDK.
Even if we measure and label it as resting heart rate, we do not get values this from Samsung Health Resting Heart Rate API.
Samsung Health SDK is for Tizen Watches and is deprecated. Did you mean for Wear OS based Galaxy Watches? The read this blog on Using Health Connect.
There are other Health Blogs for Wear OS you can just search for Health in the blogs home page.
Hope this helps
Ron
Samsung Developer Relations