Do the workouts stay the same? Yes, for the first 4 weeks the workouts repeat. Weeks 5 and 6 will be new workouts.
The workouts stay the same so YOU can improve. Improve your form, improve how well you engage your core, make it through the whole workout etc.
What if I want to do more? If you want to add more sets, reps, rounds etc you can. Remember, you’re doing this 5 days per week for 6 weeks, you’re going to be sore if done correctly! These workouts are meant to be short but effective and able to do all 5 days.
What if I want to make these workouts harder? These core workouts are meant to be for all levels. You can make them harder by adding weights, bands, or hanging from a bar if it makes sense. These workouts should be hard when done correctly as is. If you feel you need more you can add weight, more reps or rounds to get the best effect for you.