Do you remember my post about the "numb foot effect" after 35 minutes of running? Well, here it comes again!
The last time I ran 10 km was October, 13th. Since that day, I haven't run more than 7 km and longer than 40 minutes without break, due to different reasons. Today I've resumed my long-distance running: my intention was to cover at least 8 km or even 10 km, but after 32 minutes (my pace was around 4:50 minutes per km) I perceived the same hitching sensation I used to feel some months ago, so I stopped.
This fact corroborates my theory, according to which it takes constant long-distance exercise in order to avoid this annoying problem, that seems to reappear each time after 4-6 weeks of inactivity. I will keep you posted about further development.