The saying "A hundred steps after a meal can keep you healthy to ninety-nine" isn't scientifically sound. From a digestive perspective, the stomach is full after eating and requires ample blood supply for initial digestion. Taking a short rest after meals ensures greater blood flow to the gastrointestinal tract.
If you walk immediately after eating, blood must be redirected to other parts of the body, reducing blood supply to the gastrointestinal tract and hindering proper digestion. Furthermore, digestive juices in the stomach are produced in response to the intake of food. Only when the stomach is full can gastric juices be secreted abundantly.Walking after a meal causes the stomach to contract rapidly during activity, prematurely pushing inadequately digested food into the small intestine. This prevents nutrients from being fully broken down and absorbed. For some individuals, the sensation of "fullness" merely indicates stomach distension, while nutrients remain unabsorbed, leaving the body in a state of "hunger."Rushing to walk after eating inevitably diverts blood flow to the musculoskeletal system, thereby delaying digestive secretion, disrupting normal gastric digestion, and potentially triggering functional dyspepsia.
Some individuals should avoid walking after meals, such as those with gastric ptosis. These individuals should refrain from post-meal walks and minimize even light movement, opting instead for 10 minutes of lying flat after eating.With the stomach full after eating, upright activities increase gastric vibrations, burdening the stomach and potentially causing or worsening gastric ptosis. Patients with cardiovascular or cerebrovascular diseases should strictly avoid post-meal exercise. Increased gastrointestinal activity after eating redirects blood flow to the digestive tract, reducing cerebral blood supply and exacerbating their conditions.
Additionally, post-meal walking is detrimental for individuals with coronary heart disease, hypertension, cerebral arteriosclerosis, diabetes, chronic esophageal disorders, or those who have undergone gastric surgery. It may trigger angina, worsen dizziness, cause upper abdominal fullness and discomfort, induce orthostatic hypotension, premature beats, tachycardia, or paroxysmal atrial fibrillation.
Moreover, during winter's low temperatures, significant indoor-outdoor temperature differences exist in dining environments. Eating until flushed and sweating profusely, then hastily leaving the restaurant to walk in biting cold winds causes sudden constriction of sweat glands and subcutaneous capillary vessels. This easily triggers wind-cold headaches and increases the heart's blood supply burden.Therefore, it is advisable to sit quietly for about 30 minutes after meals, resting your eyes and calming your mind before resuming activity.