"Quite honestly I don't know how that happened, the back got a bit sore and I thought I had strained it but it turned out to be a lot worse than that," Butcher said yesterday.
Since January, however, Butcher has been able to return to something like full training mode, although he admits the thought of further injury has affected his preparation.
"You don't want to put yourself in cotton wool but at the same time you don't want to push too hard either just in case something happens. It's a bit of balancing act at the moment."
Even so Butcher is churning out something like 140km a week and at the peak of his training programme for the worlds he will extend that figure to beyond 200km.
"I am finding I can go 50km quite comfortably now.
"I try to average about 10km every hour and I'm also doing some walking and a couple of weight training sessions. So far so good."
The course at Steenbergen for the worlds is a 2.4km circuit and mainly flat and while Butcher is quick to emphasise that setting firm targets is dangerous for an event which so severely tests competitors, both physically and mentally, he hopes to better his previous best 24-hour distance of 207km.