Multimorbid participants had significantly lower daily MVPA (2 CDs [p = 0.02 × 10−4, d = −0.12];≥3 CDs [p = 0.07 × 10−5, d = −0.28]), LPA duration (2 CDs [p = 0.05 × 10−1, d = −0.07]; ≥3 CDs[p = 0.04 × 10−3, d = −0.24]) and daily number of steps (2 CDs [p = 0.02 × 10−2, d = −0.10]; ≥3 CDs [p = 0.01 × 10−1, d = −0.17]) compared to adults without CDs.