How long should I wait to exercise after dinner?

As a general rule of thumb, you should wait to exercise until three to four hours after eating a meal, and one to two hours after eating a snack, advises Ansari. Doing some light exercise after eating—like walking—is fine, but for a more intense workout your body needs time to digest.

Is it OK to workout at night?

A. Traditionally, experts have recommended not exercising at night as part of good sleep hygiene. Now a new study, published Oct. 29, 2018, in Sports Medicine, suggests that you can exercise in the evening as long as you avoid vigorous activity for at least one hour before bedtime.