Pretraining on Sleep Data Improves non-Sleep Biosignal Tasks. - William Theodor Lehn-Schiøler; Magnus Ruud Kjær; Phillip Hempel; Magnus Guldberg Pedersen; Rahul Thapa; Bryan He; Nicolai Spicher; Andreas Brink-Kjaer; Lars Kai Hansen; Emmanuel Mignot (CoRR, 2026)