What is he doing?
He is doing biceps curls.
What is she doing?
She is doing push ups.
What are they doing?
They are running on the treadmill.
What are they doing?
They are spinning.
What are they doing?
They are stretching.
What is she doing?
She is doing jumping jacks.
What is he doing?
He is doing sit-iups.
What is she doing?
She is doing yoga.
What is she doing?
She is using the pulley.
What is he doing?
He is squatting.