You can now sync your Apple Watch with cardio gym equipment — at one US location
https://www.theverge.com/2017/12/12/16766566/apple-gymkit-launch-fitness-health
Apple’s GymKit is here, so you can wirelessly sync fitness data between your watch and cardio machines at the gym — if you work out at Equinox or Life Time Athletic.
Apple first announced GymKit back in June. GymKit-enabled machines are available now at Life Time Athletic at Sky in New York City. They will also be available at the 14 new clubs Life Time will open in 2018. Similarly, starting next year, new Equinox clubs will have GymKit-enabled machines too.