Will the Approach S70 be updated to allow for the Garmin Strength Training Plans? There are plans available for running and biking but I do not see strength training.

At this time, there are specific Garmin devices compatible with the Strength Training Plan available through Garmin Coach as outlined on the Garmin Support article: What is Garmin Coach for Strength Training?

There are not any announcements at this time regarding compatibility with the Strength Training Plans being added to the Approach S70. If any announcements become available regarding the S70 compatibility become available, I will be sure to update users here in the forums as any new info is released.