The 30 day squat challenge only has 1 exercise which you have to do each day, and the time spent doing the exercise slowly increases day by day to help you build up your core body muscle strength gradually, ensuring you are able to complete the final day of the challenge easily.
You only have to do the amount of time shown on the 30 day squat challenge chart once per day, however if you are feeling brave then you can repeat each days challenge as many times as you like β however remember by day 30 it will be very hard to do multiple times.
You can follow this squats challenge chart