I am a contributor to a plugin called WP-Strava on GitHub: https://github.com/cmanon/wp-strava
It will soon be released in the WordPress.org repository. I was wondering if you'd like to join us to create a canonical go-to Strava plugin for WordPress. We could easily bring in your shortcode functionality.
Please join us on GitHub if you're interested. Here is my latest pull request with our conversion: https://github.com/cmanon/wp-strava/pull/4