You can not miss your routine, although it seems very simple is the typical one that has always worked, and there are no reasons to stop doing them. If you manage to do it with the correct posture, it also helps you to make other more complex styles.
It is done with a straight back, tight abdomen, legs shoulder-width apart, and legs slightly pressed. To gain balance, you can put your arms forward.
Gently lower to the knees without them exceeding the tip of your feet, once there take a short pause and return to the initial position. Repeat 15 times in four series.