Whakaotihia te rerenga e whai ake nei: I te tau 2009, i whakatau te IPC ki te whakahoki mai i nga kaitakaro me nga ngoikoretanga hinengaro i te rite tonu mo te 2012 Summer Paralympics i Ranana. I hoki mai a Niewiedział ki nga hakinakina nui o te ao i te wa i tohua ai ia mo te roopu Poland i te
2011 IPC Athletics World Championships i Christchurch. I whakahaeretia e ia te whakataetae i te tau 2011. I reira i whakataetae ia i te whakataetae 1,500 mita, i te tuarua ki a Meloch. I whai ake a Niewidzial me te mētara koura i te 1,500 mita i te 2012 IPC Athletics European Championships i Stadskanaal i mua i tana wikitoria i tana koura Paralympic tuarua i taua huihuinga i Ranana.