Estimating Workers' Physical Effort during Isometric Contractions through sEMG: The Role of Feature Selection. - Roberto Billardello; Christian Tamantini; Francesca Cordella; Francesco Scotto di Luzio; Tiwana Varrecchia; Giorgia Chini; Francesco Draicchio; Alberto Ranavolo; Loredana Zollo (ACM Trans. Hum. Robot Interact., 2026)