So, bottom line is that running has no contribution into cycling power, very little to endurance on the bike, because of other muscle groups activation. But is good for general health, fitness and bone density, but only if taken moderatly with avoiding any risk to injury. I really thought that running 2-days a week would be enough to improving running speed and duration, but it turns out, that amount is enough to barely maintain that ability. During riding season I can squeeze two running sesion per week, maybe sometimes 3 times. But it seem has no benefit. I think I'll do almost like always, decreas running in favor for cycling as the weather and day lenght improve. But I try to stick with some minimum running, at least thouse couple of minutes on treadmill after gym sessions, that will be 2times per week. And maybe add some extra whenever I'll couldn't ride, with precausions, of course. I will see, where this will lead me for next year.