Table 1.

Tasks performed by study participants during cognitive walkthrough (The sentences with * mark are specifically for with only audio experiment).

Task 1 Review your exercise plan
1. Sit in front of the Alexa Echo Show / Alexa Echo Dot*
2. Speak out “Alexa, open my exercise.”
3. Wait for the Alexa response.
4. Speak out “Alexa, show me the exercise.”
Task 2 Review Instruction for “Stand-to-Sit” Exercise
1. Choose “Stand to sit” exercise by saying “Alexa, stand to sit.”
2. Wait for the Alexa to ask you whether you want the introduction or not.
3. Speak out “Yes” to start watching the introduction video / to start listening the introduction audio.*
4. Finish the video/audio*.
Task 3 Perform the Exercise “Stand-to-Sit”
1. Speak out “Alexa, start exercise.”
2. Follow the video to do the “stand to sit” exercise for 3 times.
3. Click the “Exercise Finished” button / Speak out “Finish*.”
4. Answer the post-exercise survey questions.