Accurate and timely preoperative identification of high-risk patients provides opportunities to better inform and manage them. Current predictors for perioperative complications are either resource consuming or have low accuracy. The primary objective of the study is to assess if Wearable Devices may be an alternative to assess cardiopulmonary function, with low risks and lower costs.

Inclusion Criteria:

• Age 70 or more
• Undergoing major non cardiac surgery
• Expected surgical duration > 2 hours.

Exclusion Criteria:

• Patients unable to express consent
• Patients undergoing urgent/emergent surgery
• Patients in which surgery is planned within less than two weeks
• Patients with limited physical activity due to limited mobility related with neurological or orthopedic disease
• Acute cardiovascular event
• Surgery conducted in locoregional anesthesia only

Patients aged 70 or older undergoing major non cardiac surgery, with expected surgical duration > 2 hours.