Maybe, he is used to a high workload, but that doesn't mean you have to keep pushing your luck with a player his age...and certainly not when he's carrying a heavy knock from the last match.
I'd also point out that those two in CM have had to work extra hard this season due to there being a massive cavity where Barkley usually operated in front of them.
Little wonder the two are walking wounded right now.
Martinez is a very good, potentially very successful, manager. I like him and think he's the best we can have. But he doesn't get a free pass for being friggin stupid.