This study is aimed at clarifying changes in body composition during the perioperative period and identifying risk factors for skeletal muscle mass loss in patients with colorectal cancer. The investigators will asess the impact of the type of anaesthesia (total intravenous anaesthesia/sevoflurane anaesthesia) for colorectal surgery on the muscle function and mass, which will be evaluated using ultrasound, dynamometry and bioimpedance.
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Ultrasonographic assessment of muscle mass
Timeframe: From enrollment to 5 days after surgery
Muscle function assessment
Timeframe: From enrollment to 5 days after surgery
Bioimpedance assessment of lean and fat tissue mass
Timeframe: From enrollment to 5 days after surgery