Strength training on keto isn't hard, but it is different from a carb-heavy diet. Pros:  Increased ketosis gives you more energy to push through workouts. Bulking and cutting are easier*  Cons:  Have to reduce your workouts for first few weeks when starting, cause keto flu sucks. Bulking and cutting are more difficult*  *: one on hand, bulking and cutting on keto is a little more easy, because the increased ketosis will help make sure the mass you're putting on is muscle and not fat, and cutting is super easy because you already have your body in a perpetual state of fat-burning. On the other hand, bulking and cutting are a little more difficult because you have to be precise with not only measuring your macros, but correctly estimating how much protein you need. Too much protein and you'll crash your ketosis as the excess protein is converted to carbs; too little protein and you won't gain as much muscle as you should, which could lead to plateauing in your workouts.