In short, movement between municipalities for sports is allowed within the region, no statement is needed, proof is sports equipment - detailed below
https://www.gov.si/teme/koronavirus-sars-cov-2/omejitve-zbiranja/ In accordance with NIJZ recommendations, in the open air or on open public places in the municipality of residence, it is also allowed to carry out individual sports-recreational activities (for example, running, cycling, golf, yoga) or such sports-recreational activities where normal execution does not allow contact with other individuals (for example, tennis, badminton, bowls).
Also, from December 25, 2020, for individual sports activities or movement in natural environment outside settlements, in accordance with NIJZ recommendations, crossing between municipalities within the statistical region is allowed for an individual or persons from the same household where they are registered. During inspection, no statement needs to be submitted, the #StayHealthy app is not mandatory, sports equipment counts as proof.