Being active over time goes with less refluxEmerging evidence
Across 33 studies of 242,850 people, active people were about 20% less likely to have reflux disease (risk ratio 0.80), and each extra 30 minutes of activity a week went with about 8% less. Most of the studies were surveys at one point in time, so the authors say they can't show cause and effect. In Norway's HUNT study of 43,363 people, exercising for 30 minutes or more at least once a week halved the odds of severe reflux, though more exercise didn't lower them further, and 3 case-control studies found about a third lower odds.
Sources 4, 5, 26
Some studies found no linkMixed evidence
In 4,910 Swedish adults, activity wasn't linked with reflux once weight and other factors were accounted for, except in people with obesity. In a US community, weight but not exercise was linked with reflux, and in 100 people with confirmed reflux disease, everyday activity wasn't linked with acid measurements. Weight may explain part of the link.
Sources 27, 28, 29
Hard exercise can bring reflux onStrong evidence
Small laboratory studies agree. In 20 people with and without reflux disease, 30 minutes of running and 30 minutes of weights tripled acid in the gullet in both groups. In 10 volunteers, running after a meal increased acid time and reflux episodes. In 12 men, running after a meal raised reflux significantly at 70% of maximum heart rate, and the effect grew with effort.
Sources 7, 23, 10
The type of exercise, and eating first, matterEmerging evidence
Running brought on the most reflux and cycling less in 12 volunteers, and the researchers suggested cycling as an alternative for people with reflux. In 30 athletes with exercise heartburn, weightlifters had acid in the gullet 35.8% of the time after eating, runners 17.2% and cyclists 6.5%. Running after a light meal brought on reflux in 90% of fit adults, and rowing in 70%. Moving about after a meal sent reflux higher up the gullet than sitting still.
Sources 8, 9, 30, 31
Light or short sessions didn't make a differenceEmerging evidence
In 39 people with reflux disease on a treadmill test, light or short exercise didn't affect reflux; working at 70% or more of maximum effort was linked with reflux in people whose gullet was already inflamed.
Source 11
Bending and strainingEmerging evidence
In 25 people with reflux disease, 30 minutes of toe-touching exercises brought on reflux, mainly in those who also had reflux lying down. In another study, straining against a held breath set off reflux in 65% of 23 people with daytime reflux, against 44% of people without it.
Sources 13, 14
Exercise as a treatment: almost no trialsEmerging evidence
In the only trial we found, 75 people with moderate to severe reflux, all taking acid-reducing medicine, were split into 3 groups. 8 weeks of aerobic exercise improved quality of life but not the pressure of the valve at the bottom of the gullet; diaphragmatic breathing improved both.
Source 6
Breathing exercisesEmerging evidence
A 2026 meta-analysis pooled 10 small, mixed trials with 476 people: belly (diaphragmatic) breathing modestly improved symptom scores, but results varied a lot, quality of life didn't clearly change, and the authors say the evidence isn't enough for firm recommendations. In single small trials, 4 weeks of breathing training nearly halved acid time (9.1% to 4.7%, 19 people), and slow breathing after a meal cut reflux episodes in people with daytime reflux, though acid over the whole day didn't differ from a sham. The American Gastroenterological Association suggests breathing and relaxation for heartburn that isn't caused by acid reflux, or a gullet that's oversensitive.
Sources 15, 32, 14, 33, 34
Losing weightStrong evidence
The ACG recommends weight loss for people who are overweight (strong recommendation, moderate evidence). In 29,610 Norwegians, the more weight people lost, the more their reflux eased, and in 10,545 women, reflux became more likely with every step up in weight, even within the healthy range. In a programme of diet, activity and support, 332 overweight adults lost 13 kg on average and reflux fell from 37% to 15% of them, though there was no comparison group. In another study, half of 50 people who lost at least 10% of their weight with diet and aerobic exercise could stop their acid medicine. Two trials found weight loss cut acid in the gullet.
Sources 16, 18, 35, 17, 36, 37
Meal timing, the bed and your sleeping sideEmerging evidence
Eating dinner less than 3 hours before bed went with much more reflux disease than leaving 4 hours or more, and a meal 2 hours before bed gave more acid lying down than one 6 hours before, though symptoms were similar. Walking after dinner went with fewer symptoms than lying down. Across 5 small trials at high risk of bias, raising the head of the bed helped; in the best, 69% improved against 33%, though about half reported side effects. Lying on the right side after a fatty meal doubled reflux time compared with the left (231 against 117 minutes), and a device that discouraged right-side sleeping helped 44% against 24% with a sham.
Sources 38, 39, 40, 41, 42, 43, 44, 45
Other lifestyle changes have little evidenceEmerging evidence
A review of 100 studies found that only weight loss, raising the head of the bed and lying on the left side improved reflux measures; there was no good evidence for stopping smoking, alcohol or particular foods, though the NHS still advises avoiding foods and drinks that trigger your own symptoms. In a survey of 1,518 people in China, eating fast, eating past fullness, tight girdles and lying down soon after eating went with reflux. The ACG's only line on exercise is to avoid excessive exercise, on weak evidence.
Sources 46, 37, 1, 47, 16