The Bucks bowed out of the FA Trophy in midweek after they went down 2-0 to National League outfit Solihull Moors.
Both objectives got here after the hour mark and Wilkin believes his facet are operating out of steam in the direction of the tip of video games.
“I assumed we did OK for 70 minutes towards a full-time facet and an excellent and environment friendly facet,” mentioned Wilkin. “There have been some good moments the place we labored arduous towards the ball and turned it over and doubtless may have been a bit of extra incisive ourselves at instances.
“But a lapse of focus has gifted them a one-v-one and the lad has taken it properly. But once more I believe it’s proof that we blow up across the 70-75 minute mark and run out of steam and make poor selections off the again of it, not managing the sport in the way in which that you must in these essential moments.
“We have made inroads into ranges of depth and health and must proceed to take action.
“There is effort getting into there and the lads do get into coaching and so they do work arduous.
“It’s essential they work arduous away from once we are collectively and reside in the precise means and ensure their health ranges are up there with what’s required. We want to enhance that. It has improved, nevertheless it’s not enhancing sufficient.”
Bucks resume their struggle for National League North survival on Boxing Day after they host high-flying Chester.