How can I add several exercises to a session at once, for example a warm-up? Pro
This feature is part of the Pro plan.
Group them into a block: on the Blocks tab of the Exercises page, tap New block, enter its name and pick its exercises. For each one you can set the values it has in the block.
You add the block to a session in the exercise picker with one tap, and on the session it shows as a single row you can open. Blocks come with the Pro plan, and Premium includes them too.