I am performing some active 90/90, and I am struggling. This is the day after squatting 405 for reps. It is difficult for me to maintain integrity in my spine and core, as it should be. This is what I am ultimately trying to explain. FRC gets harder when you train like a beast. If you walk in the park with your kid, your hips aren’t going to be under enough stress to have hip mobility be tough. We need to get short and contract, lift with resistance and break down fibers get strong. FRC is fundamentally the best practice I have ever found in getting range of motion back after squatting or pulling heavy. I ended up having a great upper body workout after this, and it allowed me to break free from the sluggish, oak tree feeling after leg day and into running the next. Use your hands for the turn until you can master it. Try 3-5 sets of 4 on each leg a week.