One third of Germans are wearing a fitness tracker on their arm, according to a survey by the industry association Bitkom. The Saarbrücken start-up “InFit” goes even further. By analyzing novel biomarkers in collaboration with researchers from the Center for Bioinformatics at Saarland University, they provide a molecular fitness test that only top athletes have enjoyed so far. The corresponding app not only shows the molecular results, but also suggests training plans. 1000 samples from 300 subjects form the basis for this.