There are keyboard shortcuts for the workout player controls available on Mac and Windows. To access the keyboard shortcut map, press and hold the Fn key on your keyboard, and press F1.
ESC- Close the settings menu
Up/Down arrows- increase or decrease workout intensity
0-9- Levels 0 through 9
` -ERG mode (this is the key to the immediate left of the 1 key)
Spacebar- Pause or Play
Note that these may function differently on multilanguage or foreign language keyboards. You may need to select a different key.