Isometrics can be a great way to strengthen weaknesses throughout a range of motion in a movement.
In this example I’m using an assisted low range isometric squat, but you can take the principle and apply it to anything. Use that pause to connect with your muscles and feel what’s working, what’s not, what should be. Take the time while in that pause to figure it out and get everything responding the way it should be and then groove it proper. You’re only as strong as your weakest link, so find it and strengthen it.
I’ll typically start people between 2-3 sets of 3-6 reps with 5-6 second pauses per rep. I like this for slowing down mechanics and working on grooving proper patterns.
I’ve found this exercise to be an excellent way to get people comfortable with the bottom position of a squat. (Note: Make sure the range of motion is there first.)