In 1978, Lindemann participated in the European Junior Swimming Championships in Florence, finishing 11th in the 1500m freestyle and seventh in the 400 m freestyle, swimming a time of 4'17"58; he was shortlisted to go to 1980 Olympics in Moscow.
En 1978, Lindemann participou no Campionato Europeo Junior de Natación en Florencia, terminando 11º nos 1 500 m estilo libre e sétimo nos 400 m estilo libre, nadando nun tempo de 4'17"58, e foi preseleccionado para ir aos Xogos Olímpicos de 1980 en Moscova.