"Enough stamina" means having sufficient physical or mental energy and endurance to endure or complete a task or activity without becoming exhausted or giving up. Full definition
That there's not enough stamina to play comfortably. (eurogamer.net)
I needed caffeine later in the day to rally enough stamina to make it through my evening clients. (healthylivinghowto.com)
Will any team come out of the West Catholic Athletic League with enough stamina left to compete for the CCS Open title and CIF Northern Regional bowl bid? (sportstarsmag.com)