Researchers looked at 51 studies about helping people with digestive cancer get stronger before surgery. They found that programs combining exercise, better nutrition, and sometimes counseling for 4+ weeks before surgery improved how well patients’ bodies worked. People could walk farther and had better muscle health. While these programs seem helpful, scientists still need to learn more about whether they actually shorten hospital stays or prevent complications after surgery. This review shows that preparing your body before major cancer surgery might be an important way to help patients recover better.
The Quick Take
- What they studied: Whether exercise programs, nutrition plans, and mental health support given before digestive cancer surgery help patients get stronger and recover better
- Who participated: Analysis of 51 different research studies involving patients with cancers of the stomach, colon, liver, and other digestive organs who received preparation programs before surgery
- Key finding: Patients who did prehabilitation programs (exercise + nutrition + sometimes counseling for at least 4 weeks) could walk 35-70 meters farther on a 6-minute walk test and had better muscle and body composition compared to those who didn’t prepare
- What it means for you: If you’re facing digestive cancer surgery, ask your doctor about prehabilitation programs. These structured programs may help your body be stronger going into surgery, though more research is needed to confirm they reduce hospital stays or prevent complications
The Research Details
This was a scoping review, which means researchers searched through published studies to understand what we currently know about a topic. Two independent reviewers looked through four medical databases to find all studies about prehabilitation (getting your body ready) before digestive cancer surgery. They followed strict guidelines called PRISMA-ScR to make sure they did this fairly and completely.
The researchers looked at 51 different studies and pulled out information about what each study did, how many people participated, and what happened to those people. They checked each study for potential problems or bias that might make the results less trustworthy. They found that while the programs were different from each other, they all combined some form of exercise with nutritional support, and some included mental health counseling.
This type of review is helpful because it gives us a big picture of what research exists on a topic, rather than just looking at one study. It helps doctors and patients understand what evidence supports different treatments.
Understanding what prehabilitation programs work best before cancer surgery is important because surgery is stressful on the body. If we can prepare patients’ bodies to be stronger and healthier before surgery, they might recover faster, spend less time in the hospital, and have fewer problems after surgery. This review helps doctors know what kinds of programs have been studied and what the evidence shows so far.
This review included 51 studies, which is a good number for understanding the current evidence. The researchers followed strict guidelines to make sure they found all relevant studies and didn’t miss important research. However, the studies they reviewed were quite different from each other—some used different exercises, different nutrition plans, and different lengths of preparation. This makes it harder to say exactly what works best. The researchers were careful to note when evidence was unclear, which shows they were being honest about what we do and don’t know.
What the Results Show
The main finding was that prehabilitation programs improved how well patients’ bodies functioned. Specifically, when researchers measured how far people could walk in 6 minutes, patients who did prehabilitation programs walked 35 to 70 meters farther than they could before the program. This is a meaningful improvement—imagine being able to walk an extra half-block or more.
All the programs combined physical activity (exercise) with nutritional support. Five of the studies followed specific nutrition guidelines from European medical experts. The programs lasted at least 4 weeks before surgery. Some programs also included psychological support (counseling or mental health help), but this wasn’t done consistently across all studies.
Beyond walking distance, patients also showed improvements in their body composition, meaning they had better muscle and less fat. This is important because having good muscle strength before surgery helps your body handle the stress of the operation.
While the programs improved fitness and body composition, the review found that the impact on what happened after surgery was unclear. Researchers couldn’t definitively say whether prehabilitation reduced how long patients stayed in the hospital or prevented complications after surgery. This doesn’t mean these benefits don’t exist—it means the studies didn’t have clear enough information to prove it yet. Psychological support was included in some programs but not others, and the review noted this wasn’t done consistently, making it hard to know how important it is.
This review builds on growing evidence that preparing your body before major surgery is beneficial. Previous research has suggested that being in better physical condition before surgery leads to better outcomes, and this review confirms that prehabilitation programs can improve fitness measures. However, this review also highlights that we still need more research to understand the full picture of how these programs affect actual surgical outcomes and recovery time.
The biggest limitation is that the 51 studies reviewed were very different from each other. Some used different types of exercise, different nutrition plans, and different program lengths. This makes it hard to say which specific approach works best. Additionally, while the programs improved fitness, the review couldn’t clearly show whether they actually reduced hospital stays or prevented problems after surgery—more research is needed to answer these important questions. The review also noted that psychological support wasn’t consistently included or studied, so we don’t know how important it is for the overall program.
The Bottom Line
If you have digestive cancer and are facing surgery, talk to your medical team about prehabilitation programs. The evidence suggests these programs can improve your fitness and body composition before surgery (moderate confidence). Ask specifically about programs that combine exercise and nutrition support lasting at least 4 weeks before your surgery. While we have good evidence that these programs improve fitness, we need more research to confirm they reduce hospital stays or prevent complications (lower confidence for these outcomes).
This research is most relevant for people with digestive cancers (stomach, colon, liver, pancreas, etc.) who are scheduled for surgery. It’s also important for their doctors, surgeons, and healthcare teams who can recommend these programs. People with other types of cancer or those not facing surgery should talk to their doctors about whether similar approaches might help them. This research is less relevant for people who are not facing surgery or those with non-digestive cancers, though similar principles might apply.
Based on the studies reviewed, prehabilitation programs lasted at least 4 weeks before surgery. You should expect to see improvements in fitness (like being able to walk farther) within this 4-week timeframe. However, the full benefits for recovery after surgery may take weeks to months to become apparent. Talk to your healthcare team about realistic timelines for your specific situation.
Want to Apply This Research?
- Track your 6-minute walk distance weekly (how far you can walk in 6 minutes at a comfortable pace). Record this in your app along with how you felt during the walk. This is the same measure doctors use in research to track fitness improvements.
- Use the app to schedule and log three types of activities: (1) structured exercise sessions (walking, cycling, or other approved activities), (2) meals that meet your nutrition goals, and (3) any counseling or mental health check-ins. Set reminders for each category to build consistency over your 4+ week preparation period.
- Create a dashboard showing your weekly walk distance trend, nutrition compliance (percentage of days meeting goals), and exercise frequency. Share this with your healthcare team at appointments. After surgery, continue tracking recovery milestones like return to walking distance, energy levels, and return to normal activities.
This review summarizes current research on prehabilitation before digestive cancer surgery, but it is not a substitute for personalized medical advice. If you have been diagnosed with cancer or are facing surgery, please consult with your oncologist, surgeon, and healthcare team to discuss whether a prehabilitation program is appropriate for your specific situation. The evidence shows prehabilitation can improve fitness, but individual results vary. Always follow your doctor’s recommendations and get clearance before starting any new exercise or nutrition program, especially if you have other health conditions.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.