The best exercise routine is the one you still do in three months, which is almost never the ambitious one. Most people start with an hour a day, six days a week, and quietly abandon it inside a fortnight. What follows is deliberately small, because small is what survives contact with real life, and on keto it is plenty to hold on to muscle and support fat loss.
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Keto and intermittent fasting turn up together so often that people sometimes assume they are the same thing. They are not, but they complement each other neatly, and plenty of keto eaters drift into some form of fasting without ever deciding to. If you have reached the point where breakfast no longer appeals, you are most of the way there already. This guide explains why the two fit, what the common patterns actually involve, and how to add fasting without making yourself miserable or losing hard-won muscle.
Ask people what surprised them most about keto and a lot of them will skip past weight and talk about their head. Steadier focus, fewer energy crashes, and a working afternoon that no longer falls apart around three o’clock. Plenty find this. Some notice nothing. A smaller group feel distinctly worse for a while before anything improves. All three experiences are normal, and it helps to understand why before you decide which one applies to you.
If you start keto and keep training, the first few weeks will feel like a downgrade. Your usual run drags, your normal weights feel borrowed from someone stronger, and you finish sessions wondering whether you have broken something. You have not. What you are feeling is your body rewiring its fuel system, and the slump is temporary. Knowing roughly how it unfolds, and why, is what stops people quitting in week two when they were three weeks from feeling fine.