I really like keto diets with a weekly refeed. The first couple weeks are tough as your body is adjusting from using fat for fuel rather then glycogen. The average person can do fine without a refeed, but you are a weight trainer. You need to replenish you glycogen stores weekly. For me I never go over 30g of carbs each day, but on Saturday consume around 600g of carbs. Last meal on Friday I have a cheat meaning high fat AND high carb. Perfect time to have it since you are transitioning from high fat/low carb to low fat/high carb. Except for the first week, I can't say I feel a lack of strength, but I usually combine this diet with a cutter like tren-ace/test prop/anavar.