Inertion n. Lack of activity or exertion; inertness; quietude. (R.) "These vicissitudes of exertion and inertion of the arterial system constitute the paroxysms of remittent fever."
... to send for a medical man. After a few days he was better again, and crept about his home in a great coat, attending to his simple wants as usual with his own hands. So matters stood when the limpid inertion of Grace's pool-like existence was disturbed as by a geyser. She ... — The Woodlanders • Thomas Hardy