Exploring emotions and perspectives of families with autism spectrum disorder individuals on sports participation: a case study on Weibo using machine learning method - Shan He; Fengshi Jing; Hao Ren; Yanning Xiao; Xia Sebastiane Chen; Ruihong Tang; Yue Qiu; Junwei Zeng; Tianyu Gao; Junhao Huang (BMC Sports Science, Medicine and Rehabilitation, 2025)