Author response to OSIN-D-26-00532: self-paced stair climb and handrail use may mask links to injurious falls. - Heilmann NZ; Ruppert KM; Roberts JE; Karvonen-Gutierrez CA; Pettee Gabriel K; Ylitalo KR; Nindl BC; Cauley JA; Strotmeyer ES (Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2026)