unexercise
/ˌənɛksˈɛr.sɪs/Definitions
1. noun
The act or practice of abstaining from or avoiding physical activity, exercise, or sports.
“Her unexercise routine had taken a toll on her overall health.”
2. verb
To refrain or abstain from physical activity, exercise, or sports.
“She unexercised her horse for several weeks before training it for a competition.”