Rubuta ci gaba don wannan sakin layi - Lindroth ya inganta rikodin Finnish sau da yawa tsakanin 1928 da 1931, ya ɗaga shi daga 3.81 m zuwa 4.03 m. Ya fara tsallake mita huɗu a ranar 22 ga Satumba, 1929, yana tsalle mita 4.01 a Helsinki; shi ne Finn na farko kuma na huɗu na Turai don tsallake mita huɗu, bayan Charles Hoff na Norway, Danish Henry Petersen da Henry Lindblad na Sweden. A gasar zakarun Turai ta 1934
a Turin ya lashe lambar tagulla, ya share 3.90 m a wannan lokacin. Shi ne dan wasan Finland na farko da ya yi gasa a duniya.