{"id":10108,"date":"2020-12-01T10:00:03","date_gmt":"2020-12-01T10:00:03","guid":{"rendered":"https:\/\/www.bulk.com\/uk\/the-core\/?p=10108"},"modified":"2025-03-18T17:12:50","modified_gmt":"2025-03-18T17:12:50","slug":"intermittent-fasting-101-what-why-when","status":"publish","type":"post","link":"https:\/\/www.bulk.com\/uk\/the-core\/intermittent-fasting-101-what-why-when\/","title":{"rendered":"Intermittent Fasting 101: What, Why, When"},"content":{"rendered":"<h3><b>WHAT IS INTERMITTENT FASTING?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">Intermittent Fasting (IF) is a particular style of fasting which is suitable for active lifestyles. As the name suggests, IF uses an intermittent approach to windows of eating, with periods of fasting.<\/span><\/p>\n<h3><b>WHY, WHEN, AND HOW COULD YOU USE IF?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">You may have heard of the Warrior Diet, Lean Gains, or Eat Stop Eat. These are all popularised versions of intermittent fasting. The Warrior Diet suggests 20 hours of underfeeding, followed by 4 hours of overfeeding. Lean Gains is a 14-16 hour fast and a 8-10 hour feeding window. Eat Stop Eat has you fasting for a full 24 hours 1-2 times per week.<\/span><\/p>\n<p><span style=\"font-weight: 400\">For athletic people we like the 16\/8 approach. Here\u2019s how the most common approach to IF is set up:<\/span><\/p>\n<p><span style=\"font-weight: 400\">16 hours of fasting (to include time asleep)<\/span><\/p>\n<p><span style=\"font-weight: 400\">8 hours of eating<\/span><\/p>\n<p><span style=\"font-weight: 400\">That might look like this:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Final meal at 9pm<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Sleep<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Wake up, get on with your day (water and black coffee are fine)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">First meal at 1pm<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Eat your normal caloric allowance between 1-9pm<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">This cycle can be repeated every day, but most people do it 1-3 times per week (often to coincide with rest days from training).<\/span><\/p>\n<h3><b>WHY IS IF POPULAR IN FITNESS CIRCLES?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">This style of fasting is not extreme. It\u2019s actually pretty appealing, especially if you have a busy schedule and don\u2019t feel hungry in the morning. We naturally fast overnight \u2013 often for around 12 hours anyway. IF delays breakfast a little, and extends the natural fasting window by four hours. Some people find the idea appealing.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Some Intermittent fasting benefits<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Meet your macros: a small eating window means fewer meals, which could help you hit your caloric goals<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Larger meals: eating all your food in 8 hours means bigger portions (no more mini-meals)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Stop thinking about food: more focus, more productivity, and less distraction<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Understand true hunger: fasting could get you back in tune with your body<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Lifestyle benefits: less food prep, washing up, and carrying food with you<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Ignore the distractions: stop being tempted by the overwhelming availability of convenience food<\/span><\/li>\n<\/ul>\n<h3><b>WHAT ABOUT TRAINING AND FASTING?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">If you usually train fasted, then training on IF is no problem at all. Just make sure your post-workout meal comes 16 hours after your final meal the night before. Prioritise meal quality and macronutrients as normal, with carbs and protein for your post-workout meal. A slow-release protein powder like <\/span><a href=\"https:\/\/www.bulk.com\/uk\/products\/micellar-casein\/bpb-mpi9-0000\"><span style=\"font-weight: 400\">Micellar Casein <\/span><\/a><span style=\"font-weight: 400\">would be a great choice for fasting days.<\/span><\/p>\n<p><span style=\"font-weight: 400\">The benefit of training on an IF day is that you can actually eat more food after training, because you\u2019ll have more of your daily macros to use up.\u00a0 You might feel hungry on some fasting days. Stock up on <\/span><a href=\"https:\/\/www.bulk.com\/uk\/products\/chia-seeds\/bpf-chia\"><span style=\"font-weight: 400\">Chia Seeds<\/span><\/a><span style=\"font-weight: 400\"> and <\/span><a href=\"https:\/\/www.bulk.com\/uk\/products\/psyllium-husks-powder\/bpb-phus-0000\"><span style=\"font-weight: 400\">Psyllium Husks<\/span><\/a><span style=\"font-weight: 400\">, which are high in fibre and add bulk to meals.<\/span><\/p>\n<h3><b>FASTING AS A LIFESTYLE. NOT A CRASH DIET.<\/b><\/h3>\n<p><span style=\"font-weight: 400\">The important thing to remember about intermittent fasting is that it\u2019s not a fad diet, or a shortcut to fat loss. It should be a plan of eating that happens to suit your lifestyle and routine. If you wake up hungry, or like to snack, then it probably isn\u2019t for you. But if you don\u2019t have a huge appetite, or find breakfast a chore, then it might suit. Don\u2019t get tied to the idea of fasting as a magic bullet. It\u2019s just another dietary tool to consider.<\/span><\/p>\n<h3><b>SOME PEOPLE SHOULDN\u2019T USE FASTING.<\/b><\/h3>\n<p><span style=\"font-weight: 400\">IF isn\u2019t for everyone. If you have a history of disordered eating, it might not be a good idea. If you are under a lot of stress, fasting isn\u2019t the best approach for you right now. It will add more pressure and could leave you feeling tired. If you are pregnant or breastfeeding, you shouldn\u2019t consider fasting either \u2013 for the time being at least.<\/span><\/p>\n<h3>Related articles<\/h3>\n<p>Looking to learn more? We believe that every person, with support, has the right to transform their lives through fitness. That&#8217;s why we&#8217;ve put together of articles with expert advice, all to help you on your fitness journey. From intermittent fasting, leaning bulking and how macro splits,\u00a0check out relevant articles below:<\/p>\n<p><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;pull day workout&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:769,&quot;3&quot;:{&quot;1&quot;:0},&quot;11&quot;:3,&quot;12&quot;:0}\"><a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/micronutrients-definition-examples-benefits\/\" target=\"_blank\" rel=\"noopener\">Micronutrients examples<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/understanding-liquid-calories\/\" target=\"_blank\" rel=\"noopener\">Liquid calories<\/a><br \/>\n<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/what-are-thermogenics-do-they-work\/\" target=\"_blank\" rel=\"noopener\">What is Thermogenic?<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/can-i-really-eat-carbs-and-still-lose-weight\/\" target=\"_blank\" rel=\"noopener\">Can you eat carbs and lose weight?<\/a><\/span><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;pull day workout&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:769,&quot;3&quot;:{&quot;1&quot;:0},&quot;11&quot;:3,&quot;12&quot;:0}\"><br \/>\n<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/how-to-decide-your-own-macro-split\/\" target=\"_blank\" rel=\"noopener\">Best macro split<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/cheat-meals-destroy-gains\/\" target=\"_blank\" rel=\"noopener\">How often should you have a cheat day?<\/a><br \/>\n<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/lean-gaining-packing-on-muscle-mass-not-fat\/\" target=\"_blank\" rel=\"noopener\">How to lean bulk<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/bulking-with-a-low-appetite\/\" target=\"_blank\" rel=\"noopener\">Food to bulk up<\/a><br \/>\n<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/benefits-of-working-out-with-a-partner\/\" target=\"_blank\" rel=\"noopener\">Find a gym buddy<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a class=\"in-cell-link\" href=\"https:\/\/www.bulk.com\/uk\/the-core\/broscience-part-4-protein-shakes-milk-water\/\" target=\"_blank\" rel=\"noopener\">Protein shakes with milk or water<\/a><br \/>\n<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>WHAT IS INTERMITTENT FASTING? Intermittent Fasting (IF) is a particular style of fasting which is suitable for active lifestyles. As the name suggests, IF uses an intermittent approach to windows&#8230;<\/p>\n","protected":false},"author":10,"featured_media":16735,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1974,352],"tags":[1184,1185,1186],"class_list":["post-10108","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-healthwellbeing","category-nutrition","tag-fasting","tag-intermittent-fasting","tag-if"],"_links":{"self":[{"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/posts\/10108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/comments?post=10108"}],"version-history":[{"count":15,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/posts\/10108\/revisions"}],"predecessor-version":[{"id":25074,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/posts\/10108\/revisions\/25074"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/media\/16735"}],"wp:attachment":[{"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/media?parent=10108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/categories?post=10108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bulk.com\/uk\/the-core\/wp-json\/wp\/v2\/tags?post=10108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}