A lot of times we have questions around how long before working out should i eat, as obviously none of us likes working out with that "full" feeling. The stomach if still digesting requires a good supply of blood to do its job, however if we start working out, blood is suddenly sent to the muscles involved in exercise. As a result the food just sits longer there waiting to be digested, thereby starting to ferment or putrefy and causing a whole host of problems like headaches, allergies (when undigested toxic remnants are let loose in the bloodstream), gastro and digestive problems.
Here is a good list of digestive times of various foods when eaten alone. Ofcourse it is understood that the more foods you mix the more time it will take to digest and that will be significantly more than the times mentioned below for single items. Significant chewing and mastication is recommended for below times and mixing of concentrated carbs with proteins (acid and alkaline) retards digestion, so does addition of fatty dressings (countered by a good salad)
DIGESTION TIME OF VARIOUS FOODS
(approx. time spent in stomach before emptying). ........
Water
when stomach is empty, leaves immediately and goes into intestines,
Juices
Fruit vegetables, vegetable broth - 15 to 20 minutes.
Semi-liquid
(blended salad, vegetables or fruits) - 20 to 30 min.
Fruits
Watermelon - 20 min.digestion time.
Other melons - Canteloupe, Cranshaw, Honeydew etc. - 30 min.
Oranges, grapefruit, grapes - 30 min.
Apples, pears, peaches, cherries etc. - digest in 40 min.
Vegetables
Raw tossed salad vegetables - tomato, lettuces, cucumber, celery, red or green pepper, other succulent vegetables - 30 to 40 min. digestion. -
Steamed or cooked vegetables
Leafy vegetables - escarole, spinach, kale, collards etc. - 40 min. - Zucchini, broccoli, cauliflower, string beans, yellow squash, corn on cob - all 45 min. digestion time
Root vegetables - carrots, beets, parsnips, turnips etc. - 50 min.
Semi-Concentrated Carbohydrates - Starches
Jerusalem artichokes & leafy, acorn & butternut squashes, corn, potatoes, sweet potatoes, yam, chestnuts - all 60 min. digestion.
Concentrated Carbohydrates - Grains
Brown rice, millet, buckwheat, cornmeal, oats (first 3 vegetables best) - 90 min.
Legumes & Beans - (Concentrated Carbohydrate & Protein)
Lentils, limas, chick peas, peas, pigeon peas, kidney beans, etc. - 90 min. digestion time
soy beans -120 min. digestion time
Seeds & Nuts
Seeds - Sunflower, pumpkin, pepita, sesame - Digestive time approx. 2 hours.
Nuts - Almonds, filberts, peanuts (raw), cashews, brazil, walnuts, pecans etc. - 2 1/2 to 3 hours to digest.
Dairy
Skim milk, cottage or low fat pot cheese or ricotta - approx. 90 min. digestion time
whole milk cottage cheese - 120 min. digestion
whole milk hard cheese - 4 to 5 hours digestion time
Animal proteins
Egg yolk - 30 min. digestion time
Whole egg - 45 min.
Fish - cod, scrod, flounder, sole seafood - 30 min. digestion time
Fish - salmon, salmon trout, herring, (more fatty fish) - 45 min. to 60 digestion time
Chicken - 11/2 to 2 hours digestion time (without skin)
Turkey - 2 to 2 1/4 hours digestion time (without skin)
Beef, lamb - 3 to 4 hours digestion time
Pork - 41/2 to 5 hours digestion time
Digestion Times area taken from the first link which came up in google search for "times of digestion"
FreeTrainers Forums - DIGESTION TIME OF VARIOUS FOODS
Hope this is useful for people here who are planning their diet and workout timings
