Inrun tables have also been placed further back from the knoll and flight curves made shallower in order to allow athletes to glide more efficiently and safely along the contour of the slope. This has significantly reduced such precarious heights over the knoll as was the case in the early 1990s and prior: in that era, athletes using the parallel style would jump in a more upward trajectory off the table, reaching vast heights but at the expense of distance; and rather than glide, they instead plummeted towards the slope. Today, Kulm and Planica remain extremely steep in the flight phase; Oberstdorf and Vikersund, by comparison, have longer slopes and do not enable as much height over the knoll.