Rubuta ci gaba ga wannan sakin layi - An gano gwaninta a lokacin gasar makaranta a 1926, lokacin da ya bayyana cewa ta yi tsalle 30 centimeters mafi girma fiye da 'yan uwanta. A ranar 3 ga Yuli 1928 ta kafa rikodin Dutch mara izini ta tsallake mita 1.465, wanda aka bi shi da sabon tarihin duniya na mita 1.582. A wannan shekarar ta zama 'yar wasan Dutch ta farko da ta lashe lambar yabo ta Olympics. Ta inganta tarihinta na duniya sau biyu: zuwa mita 1.608 a 1929 da mita 1.623 a 1932. A Lokacin Wasannin Mata na Duniya na 1930
Gisolf ya zama na biyu. Lokacin da ta yi tsalle-tsalle tare da abokin hamayyarta guda ɗaya, Jamus Inge Braumüller, ta tsage tsoka, ta lalata damarta na farko.