BadmintonGRF: A Multimodal Dataset and Benchmark for Markerless Ground Reaction Force Estimation in Badminton. - Kuoye Niu; Jianwei Li; Shengze Cai; Yong Ma; Mengyao Jia; Lishun Shen; Zhenheng Zhang; Yuxin Peng; Xian Song (CoRR, 2026)