if you look at the green bars to the left of the condition meter you will see it at only 1 bar, which means they are at rest for any training you do. Those bars are how you train certain players specifically
RETIREDLevel 25, Season 25, 18 League Titles, 10 CL Titles, 3 Cup TitlesServer 201, 4-5-1 V-style fan, 0 Tokens bought