Reliability and validity of the one-minute sit-to-stand test in Parkinson’s disease

To investigate the validity and test–retest reliability of the One-Minute Sit-to-Stand Test (1STS) in individuals with Parkinson’s disease (PD). Twenty-eight individuals with PD performed the 1STS twice with a 7-day interval. Concurrent validity was examined using correlations with the 2-Minute Walk Test (2MWT) and the Hoehn and Yahr (H&Y) stage.

Test–retest reliability was assessed using the intraclass correlation coefficient (ICC). The 1STS showed a strong positive correlation with the 2MWT (r = 0.69, p