TY - JOUR AU - Guthold, R; Stevens, GA; Riley, LM TI - Global trends in insufficient physical activity among adolescents: a pooled analysis of 298 population-based surveys with 1· 6 million participants JO - The Lancet Child & Adolescent Health VL - 4 PY - 2020 DO - 10.1016/S2352-4642(19)30323-2 L3 - PubMed-ID: 31761562 SP - 23 EP - 35. ER -