An effective but rarely written prescription
The benefits of movement are well known, yet they rarely get enough room in everyday medical practice. According to the data in the presentation, one in three adults in the US has received exercise advice from a physician. Among the patients who would benefit most, 20% or fewer receive a prescription. Only 17% of physicians work with exercise specialists.
Barriers on the physician’s side include lack of time, lack of protocols and not knowing local options. On the patient’s side, cost, limited transportation and the difficulty of changing habits stand out. The presentation stresses that concrete, individualized advice works better than a general “be more active.” Physical activity should also be asked about like a basic “vital sign,” such as blood pressure or pulse.
Start small, progress slowly
- Start with walkingWalking is a good place to start for beginners; each session includes 5–10 minutes of warm-up and cool-down.
- Lengthen the session firstAdd 5–10 minutes to the session; frequency and intensity come later.
- Then frequency and intensity3–5 days a week; intensity is tracked by perceived exertion: moderate 5–6, vigorous 7–8.
- The 10% ruleWeekly volume rises by no more than 10%.
- Add strength2–3 days a week, with 48 hours between sessions for the same muscle group.
- Keep it regularGains begin to fade about 2 weeks after stopping; an enjoyable activity improves adherence.
What does the science say?
According to the presentation’s summary, regular physical activity lowers the risk of death from all causes in adults. Risk is also found to be lower for cardiovascular disease and stroke, high blood pressure and type 2 diabetes. Reduced risk is also listed for cancers of the bladder, breast, colon, endometrium (the lining of the uterus), esophagus, kidney, stomach and lung.
The benefit is not limited to the heart and cancer. Dementia risk is reported to go down, and cognitive function, sleep and quality of life to improve. Symptoms of anxiety and depression also decrease. For body weight, exercise limits excess weight gain, and an adequate dose supports weight loss and maintenance, with an added effect alongside diet.
Children are reported to gain in bone health, cognitive function and muscle and heart-lung fitness. In older adults, falls and fall-related injuries decrease and physical function improves. For children and adolescents, the recommendation is 60 minutes of moderate-to-vigorous activity every day; the presentation also stresses that activity at school does not lower academic performance.
A little is better than none: every bit of movement counts, however short.
Movement and the digestive system
From a gastroenterology perspective, the presentation adds a few points from recent literature. In fatty liver disease (metabolic dysfunction-associated steatotic liver disease, MASLD), exercise reduces liver fat even without weight loss; a 2024 European recommendation cites 150–300 minutes a week of moderate or 75–150 minutes of high-intensity activity. In inflammatory bowel disease (IBD), exercise is safe, reduces fatigue and improves quality of life. Exercise is also linked to lower colorectal cancer risk and better survival after diagnosis. In constipation and irritable bowel syndrome (IBS), regular activity may improve symptoms.
How much, and how hard?
For adults, the recommendation is 150–300 minutes a week of moderate-intensity aerobic activity (rhythmic movement that raises heart and breathing rate) or 75–150 minutes of vigorous activity. The two can be combined in different ways. On top of this come 2–3 days a week of strength exercise working all the major muscle groups, and balance exercise for those at risk of falling. According to the presentation, 300 minutes offers more benefit than 150.
Measuring intensity does not require a laboratory. On a 0–10 “perceived exertion” scale, moderate intensity corresponds to 5–6 and vigorous to 7–8. For beginners, walking is a good place to start; each session includes 5–10 minutes of warm-up and cool-down. The talk test is another simple way to monitor intensity.
Physical activity and exercise are not the same thing. The first is any movement that clearly raises energy use, such as climbing stairs, gardening or walking to work; exercise is planned and repeated. The 2018 guidelines dropped the “at least 10-minute session” requirement: every duration counts, and there is no threshold for benefit. In people who are not very active, even light activity in place of sitting is beneficial.
Start small, progress slowly
The presentation’s most repeated idea: a little is better than none. When progressing, session length (5–10 minutes) is increased first, then frequency and intensity; weekly volume should rise by no more than 10%. If signs of overtraining appear, namely upper respiratory infection, muscle and joint pain or a drop in performance, volume is reduced and the type of exercise is changed.
Another principle is reversibility: about 2 weeks after stopping, the gains begin to fade. To keep them, 2–3 days a week of aerobic activity and at least 1 day of strength exercise are suggested. An enjoyable activity improves adherence; it can be at home, outdoors or in a gym, alone or with a group.
In healthy people, unnecessary tests should not be a barrier to starting: if there is no cardiovascular, metabolic or kidney disease and no symptoms, moderate-intensity activity can begin. If there are symptoms such as chest pain, breathlessness on exertion or fainting, or a known disease, a medical evaluation comes first. In situations such as pregnancy, diabetes, cancer or arthritis, advice is adapted to the person; consult your physician. Movement does not replace treatment but is added to it.
Further reading
- Ministry of Health Türkiye Physical Activity Guide
- 2018 PAG Advisory Committee
- ACSM 2015 screening algorithm
- EASL-EASD-EASO 2024
- Exercise is Medicine® (ACSM initiative)
Sources
- The Physical Activity Guidelines for Americans Piercy KL, Troiano RP, Ballard RM ve ark. JAMA, 2018;320(19):2020–2028
- World Health Organization 2020 guidelines on physical activity and sedentary behaviour Bull FC, Al-Ansari SS, Biddle S ve ark. Br J Sports Med, 2020;54(24):1451–1462
- EASL–EASD–EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD) European Association for the Study of the Liver (EASL), EASD, EASO. J Hepatol, 2024;81(3):492–542
- Türkiye Fiziksel Aktivite Rehberi T.C. Sağlık Bakanlığı, Türkiye Halk Sağlığı Kurumu, Yayın No: 940, Ankara, 2014 (2. baskı)
- Updating ACSM's Recommendations for Exercise Preparticipation Health Screening Riebe D, Franklin BA, Thompson PD ve ark. Med Sci Sports Exerc, 2015;47(11):2473–2479
Last updated: October 2026