Yes, there are lot of problems with running. Climate is one (snow, freezing, rains for me, I can have strong winters). The extra weight and pressure on knees is the other problem. I have bad experience. That is why I prefer cycling in gym, I can regulate the load, see the calories and dinstances and so on. I cycled some 25 km with 200-350 W load (no less than 200W and with some planned bursts to 350W) in each gym session before covid19. Now I am back to gym and current norm is 15 km per session, but I am increasing to my previous levels gradually. It burns lot of calories.