Hi PaulineH30,
Welcome to Apple Support Communities. We understand that you're having an issue with your Apple Watch capturing all the Workout details during your Indoor Spin Workout. We'd like to help.
Which Apple Watch are you using? We ask because depending on your model, you should be able to record Speed and Distance, and possibly Elevation. Check out more about that here:
Cycling
Choose Indoor Cycle for activities like taking a spin class or riding a stationary bike. Choose Outdoor Cycle for riding a bicycle outside.
Depending on your Apple Watch, you might need to bring your iPhone with you to track certain metrics:
* Speed and distance: Apple Watch Series 2 or later has built-in GPS to track these metrics and provide a map of your outdoor cycle in the workout summary on your iPhone. For Apple Watch Series 1 or earlier, bring your iPhone along to track your speed and distance.
* Elevation: Apple Watch Series 3 or later has a built-in altimeter to track this metric. For Apple Watch Series 2 or earlier, bring your iPhone along to track your elevation.
If you have additional questions about this issue, we recommending that you connect with Apple Support so they can look into this further.
Hope that helps.
Take care!