This study looks at how exercise affects people with cancer who are getting chemoradiotherapy, a combination of chemotherapy and radiation. During chemoradiotherapy, patients often lose muscle and strength, which can lead to a condition called *sarcopenia* (muscle loss). This can lower their quality of life. The study also focuses on *myokines*, substances made by muscles that help them grow and repair. By checking blood levels of myokines, doctors can find out who might get sarcopenia early. The study will test if exercises like resistance training (lifting weights) and walking can help improve muscle and strength and make patients feel better.

• Study includes cancer patients aged 20-70 who can do exercises.
• Participants must be able to speak Mandarin, Taiwanese, or Hakka.
• The study aims to improve quality of life through specific exercises.