Now, Week 13 stared back. No badges. No “Great job!” No digital cheerleaders. Just a blank template: Repeat any previous workout. Your choice.

“No,” Lina said, surprised by her own honesty. “This is Week 13.”

She stood up, grabbed her water bottle. “Also, throw away the white sneakers. They’re a lie.”

She closed the app. Stood up. The new girl glanced over, probably expecting Lina to launch into a heroic set of box jumps.

The new girl looked down at her pristine shoes, then back at Lina. “What do I do tomorrow?”