Sometimes during a run I'll suddenly start to feel all weak and shaky. Even though I've only run for about twenty minutes.
So it can't be The Wall can it? Usually I blame it on not eating enough breakfast. Because sometimes I get the same shaky feeling during the day, just sitting behind my desk when I haven't had lunch yet. But this morning I had one and a half a sandwich. And still I felt faint, shaky and weak half way through my 40 minute run.
What usually helps is having a dextrose tablet. That gets rid of the shaky feeling.
But I'm wondering: what causes this feeling? And what can I do to avoid it? Any pointers?