“…These investigators [ 38 ] proposed that the link between exercise and the immune system can be exploited in cancer therapy and that exercise may not just be “healthy”, but may in fact be therapeutic. Previous studies on the effectiveness of postoperative exercise training on SP, SD, QOL, and functional capacity in HNC survivors revealed positive results [ 13 , 14 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Although many authors have studied the effectiveness of hospital-based exercise training in this research area [ 16 , 17 , 18 , 19 , 20 , 24 , 25 , 26 ], relatively few investigations have been conducted to explore the clinical benefit of HBET [ 21 , 22 , 23 ].…”