If you threw without your sensor on there is a way to estimate your workload from those throws. Tap the profile picture on the top left of the home screen and the tap ''Account Settings.' Within the settings there is an option to 'Add Workload.' Follow the prompts to add a simulated workload into your account.
WARNING: This feature simulates your workload and will not give accurate workload measurements if consistently used. This feature is not intended for regular use. Only wearing your sleeve for every throw will give accurate workload measures.