Before your operation — prehabilitation, optimization, and the 6-week window
The weeks before surgery are not waiting time. They are preparation time. Dr. Khaled Ghalwash and Dr. Mohamed Ghalwash use this window to optimize your comorbidities, treat anaemia, build your nutritional reserves, stop smoking and alcohol, and add a structured exercise plus mental preparation program. This is called prehabilitation, and it changes how your body absorbs the stress of surgery.
The single highest-impact action is stopping smoking and alcohol six weeks before your operation. Both have been shown to reduce post-operative complications meaningfully when stopped at this window. Earlier is even better. The next-highest is treating anaemia with intravenous iron, which corrects iron deficiency in 2 to 4 weeks and reduces your transfusion risk during surgery.
The five-step prehabilitation protocol
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1
Stop smoking, ideally 6 weeks before
Smoking abstinence reduces wound complications, pulmonary infections, and overall morbidity. The 6-week mark is when measurable benefit appears. Earlier is better. We refer to local cessation programs and offer nicotine replacement therapy when needed.
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2
Stop alcohol, also 6 weeks before
Regular alcohol consumption raises post-operative complication rates including infection, bleeding, and cardiac events. Stopping for 6 weeks before elective surgery reduces these risks. Patients who cannot stop on their own are referred to support programs.
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3
Treat anaemia with intravenous iron
Iron deficiency anaemia is common in cancer, chronic disease, and heavy menstrual bleeding patients. IV iron corrects it in 2 to 4 weeks and reduces transfusion risk. We screen ferritin and transferrin saturation in addition to haemoglobin so the diagnosis is precise.
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4
Nutritional supplementation 7 to 10 days
For malnourished or sarcopenic patients (low muscle mass, often hidden under high BMI), oral nutritional supplements with high-calorie and high-protein content for 7 to 10 days before surgery improves outcomes. We assess nutritional status and prescribe specific products with branched-chain amino acids when indicated.
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5
Exercise plus mental preparation 4 to 6 weeks
Structured physical activity, even moderate walking and resistance bands, builds cardiovascular reserve and muscle mass. Mental preparation including expectations, breathing techniques, and post-op visualisation reduces peri-operative anxiety. Together with nutrition, this is "prehabilitation". The longer the window, the more benefit.
Dr. Khaled Ghalwash treats the time between booking and surgery as part of the operation. Six weeks of smoking abstinence, three weeks of intravenous iron, ten days of high-protein supplements, and four weeks of light exercise. The patient walks into the operating room a stronger version of themselves than the day they were diagnosed. The recovery starts before we cut.
Comorbidity optimisation matrix
| Comorbidity | Pre-op target | Time needed |
|---|---|---|
| Diabetes | HbA1c < 8% (ADA 2025) | 4-8 weeks |
| Hypertension | BP < 140/90 mmHg, controlled medications | 2-4 weeks |
| Iron deficiency anaemia | Hb > 12 g/dL, ferritin normalised | 2-4 weeks (IV iron) |
| Smoking | Complete cessation | 6 weeks minimum |
| Alcohol | Complete cessation | 6 weeks minimum |
| Malnutrition / sarcopenia | Albumin > 3.5 g/dL, BMI stable | 7-10 days nutrition + 4-6 weeks resistance training |
| Frailty | Improved gait speed, grip strength | 4-6 weeks structured exercise |
Specifics on diabetic optimization, including HbA1c targets, GLP-1 stop windows, and the role of HOMA-IR, are on the diabetic patients page. Cardiac patients with elevated risk are detailed on the cardiac patients page.
Two complementary strategies: reduce stress, build resilience
This is why a fit patient still benefits from the carbohydrate drink, and a frail patient still benefits from prehabilitation even if their surgery is small. The two ideas compound regardless of starting condition.
Frequently asked questions
Why must I stop smoking 6 weeks before my operation?
Smoking abstinence for 6 weeks before surgery has been shown to reduce post-operative wound complications, pulmonary infections, and overall morbidity. The lungs need that long to clear inflammatory changes. Dr. Khaled Ghalwash refers patients to local cessation programs as part of the standard pre-op pathway.
Can I drink alcohol up to the day of surgery?
No. Patients with regular alcohol use should stop, ideally 6 weeks before surgery. Continued alcohol consumption raises the rate of post-operative complications including infection, bleeding, and cardiac events.
What is prehabilitation?
Prehabilitation is the structured 4-6 week pre-operative program of exercise, branched-chain amino acid nutrition, and mental preparation. It increases your physical resilience to the stress of surgery. Pairs with ERAS, which reduces the stress itself.
Why is anemia checked before surgery?
Anemia is common in patients with cancer, chronic disease, or heavy menstrual bleeding. Operating on anemic patients raises transfusion rates and complication risk. Pre-operative IV iron corrects iron-deficiency anemia in 2-4 weeks and is part of the standard ERAS workup.
Should I take protein supplements before bariatric surgery?
Yes for malnourished patients. The standard is 7-10 days of high-calorie, high-protein oral nutritional supplements before any major elective surgery in patients identified as malnourished or sarcopenic. Even patients with high BMI can be sarcopenic.
How early should I start prehabilitation?
Ideally 4-6 weeks before surgery. The longer the window, the more benefit. Even 2 weeks of structured exercise + nutrition has shown measurable improvement in functional capacity.
Is exercise safe before bariatric surgery?
Yes, and it is recommended. Walking, low-impact cardio, and resistance training improve cardiovascular fitness and muscle mass before surgery, both of which reduce complications and accelerate recovery.
Schedule with Dr. Khaled Ghalwash and Dr. Mohamed Ghalwash
Book your pre-operative consultation. We build your individual prehabilitation plan based on your comorbidities, fitness, and the specific surgery planned. The plan is written and given to you on paper, plus monitored at follow-up.
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