Preparing for major surgery starts weeks before your operation date, not the night before. The steps you take in advance, from building physical fitness to adjusting medications to setting up your home, directly affect how smoothly the procedure goes and how quickly you recover. Here’s what to focus on and when.
Start Exercising Early
Physical preparation, sometimes called “prehab,” is one of the highest-impact things you can do before a major operation. A review of data from over 1,800 patients found that preoperative exercise training reduced lung complications after surgery by 48%. Patients who exercised before their operations were also discharged more than two days earlier than those who didn’t.
Programs as short as one week showed meaningful benefits across cardiac, lung, and abdominal surgeries. That said, starting earlier gives you more time to build stamina. Most programs involve a combination of aerobic exercise (walking, cycling) and breathing exercises. If you have four to six weeks before your surgery date, aim for daily walks that gradually increase in duration and intensity. Even if you’re not a regular exerciser, any consistent movement you add will help your body handle the stress of surgery and bounce back faster.
Increase Your Protein Intake
Surgery puts your body into a high-stress state where it breaks down muscle tissue faster than usual. Eating more protein in the weeks beforehand helps protect muscle mass and supports wound healing afterward. Experts recommend 1.2 to 1.5 grams of protein per kilogram of body weight per day in the lead-up to surgery. For a 150-pound person, that works out to roughly 80 to 100 grams of protein daily. During recovery from major operations, targets can go even higher, up to 2.0 to 3.0 grams per kilogram per day.
Practical sources include eggs, chicken, fish, Greek yogurt, cottage cheese, beans, and protein shakes. If you have trouble eating enough, liquid protein supplements are an easy way to close the gap. Stock your freezer with high-protein meals before your surgery date so you’re not scrambling during recovery.
Review Every Medication and Supplement
Certain medications and supplements interfere with blood clotting or interact with anesthesia, and they need to be stopped well before your operation. Your surgical team will give you specific instructions, but knowing the general timelines helps you plan.
Blood thinners require the longest lead time. Warfarin is typically stopped five days before surgery. Newer blood thinners like rivaroxaban, apixaban, and dabigatran are usually paused 24 to 48 hours before the procedure, depending on the bleeding risk and your kidney function. Platelet-blocking medications like clopidogrel and prasugrel need to be stopped five to seven days ahead.
Aspirin is worth special mention. Although it clears the bloodstream quickly, its effects on platelets are irreversible and last the full 8- to 9-day lifespan of each platelet. Your surgeon will tell you whether to stop it. Short-acting anti-inflammatory drugs like ibuprofen restore about half of normal platelet function within six hours and normalize within 24 hours, so they’re less of a concern.
Herbal supplements are easy to overlook but can cause real problems. Garlic, ginkgo biloba, ginger, fish oil, feverfew, green tea extract, vitamin E, and high-dose vitamin C all affect clotting. St. John’s Wort can interfere with anesthesia drugs. Echinacea, kava kava, valerian, and ephedra also carry surgical risks. Stop all herbal supplements at least one to two weeks before surgery unless your team says otherwise. Bring a complete list of everything you take, including over-the-counter products, to your preoperative appointment.
What Your Preoperative Tests Look For
Before major surgery, your team will order a set of tests to make sure your body can safely handle the procedure. A complete blood count is standard for virtually all major operations, checking that you have enough red blood cells to carry oxygen and enough platelets for clotting. Kidney function tests are also routine, since your kidneys need to process anesthesia drugs and fluids during and after surgery.
An electrocardiogram (ECG) is typically offered if you have any known health conditions or haven’t had one in the past 12 months. If you have a heart murmur along with symptoms like breathlessness, chest pain, or fainting, your team may also order an echocardiogram (an ultrasound of your heart). Chest X-rays are not routinely required unless there’s a specific reason to check your lungs.
If you have diabetes, expect a blood sugar management test (HbA1c) if you haven’t had one in the past three months. This matters: diabetic patients whose HbA1c is above 7% have roughly double the risk of post-surgical infections compared to those below 7%. If your levels are high, your doctor may adjust your diabetes medications in the weeks before surgery to bring your blood sugar into a safer range. The target during and after surgery is generally 140 to 180 mg/dL.
Quit Smoking at Least Four Weeks Out
Smoking constricts blood vessels and impairs the immune cells responsible for healing wounds. According to the American College of Surgeons, quitting four to six weeks before your operation and staying smoke-free for four weeks afterward cuts your rate of wound complications by 50%. That’s one of the largest risk reductions you can achieve through a single lifestyle change. If your surgery is scheduled soon and four weeks isn’t possible, quitting even a few days beforehand still helps reduce the carbon monoxide load in your blood, which improves oxygen delivery to tissues during the procedure.
Fasting Before Surgery
Fasting rules exist because food or liquid in your stomach during anesthesia can be inhaled into your lungs, a dangerous complication. The American Society of Anesthesiologists sets these minimums:
- Clear liquids (water, black coffee, pulp-free juice, clear tea): stop 2 hours before
- A light meal (toast with clear liquids): stop 6 hours before
- Heavy meals (fried foods, fatty foods, meat): stop 8 or more hours before
These windows apply to all ages. “Clear liquids” does not include milk, orange juice with pulp, or cream in your coffee. When in doubt, water is always safe up to the two-hour mark. Your surgical team may give you slightly different instructions based on your specific procedure, so follow their guidance if it differs.
Managing Anxiety Before Surgery
Preoperative anxiety isn’t just uncomfortable. It’s linked to increased postoperative pain, higher infection risk, and longer healing times. Two approaches have the strongest evidence for reducing surgical anxiety: thorough preoperative education and music therapy.
Preoperative education means understanding exactly what will happen during your procedure, what recovery looks like day by day, and what sensations are normal afterward. Ask your surgical team to walk you through the timeline. Knowing what to expect removes the fear of the unknown, which is a major driver of anxiety. Music therapy, whether guided by a therapist or simply listening to calming playlists before and after the procedure, has also consistently reduced anxiety in surgical patients. Relaxation techniques like deep breathing and progressive muscle relaxation can help reduce the sensation of pain after surgery, even if they don’t fully eliminate anxiety on their own.
Set Up Your Home Before You Leave
You won’t want to rearrange furniture or go shopping when you get home from a major operation. Spend time before surgery making your recovery space safe and functional.
The most important principle: keep everything you need on one floor. Set up your bed on the entry level if possible, and make sure a bathroom or portable commode is on the same floor. Stock up on frozen meals, canned food, toilet paper, and personal care items so you won’t need to make a store run in your first week home.
Place a sturdy, straight-backed chair in every room you’ll use so you can sit while doing basic tasks. Move frequently used items to counter height so you don’t have to bend down or reach overhead. Remove throw rugs, loose cords, and anything else you could trip on. Add night lights to hallways and dark rooms.
Bathroom safety deserves extra attention. Install grab bars near the toilet and bathtub, secured vertically or horizontally to the wall (not diagonally, and never use towel racks as support). Place non-slip mats inside the tub and a non-skid bath mat outside it. A shower chair with rubber-tipped legs lets you bathe without standing. Position soap and shampoo within easy reach so you don’t have to twist or stretch.
Depending on your surgery, you may also need a long-handled shoehorn, a sock aid, a reacher for picking things up off the floor, or an elevated toilet seat. If you’ll be using a walker, attach a small basket to carry your phone, medications, and a notepad. Having all of this ready before surgery day means you can focus entirely on healing once you’re home.