Remember there’s a fat adaption phase when you start keto (typically 12 week ish) and during this time strength/speed/performance can all take a hit. Don’t get discouraged. Ensure you’re on track with macros and take on plenty of electrolytes – esp sodium. Once you’re fat adapted you’ll probably need nothing pre or post workouts but at the start you’ll be a lot more hungry. Remember fat is your new fuel – so try fatty coffees pre or a shot of MCT oil. Post (when you’re hungry) eats anything keto but there’s no need to chomp down tons of protein. Keto is only moderate protein remember and it’s also a muscle sparing woe.