LSE stands for: Larynx Slide Exercise.
This exercise slides your larynx by way of using your fingers to activate muscles relating to vocalization, specifically moving the larynx into the right position. (See photos below)
Start the exercise by slowly sliding your larynx in all 4 directions: left, right, up and then down.
At first, slide your larynx 5 times for each direction.
Next time move up to 5 times x 2 reps if you have gotten used to it.
Finally when you are comfortable with the exercise, aim to do 10 times x 2 or 3 reps.
You will increase the strength you use to slide, little by little.
With the above training, you can exercise the muscles relating to vocalization. As a result, you can improve your pitch, have a more durable throat, and be able to sing for a longer time.
Note1:You should generally already have soft and flexible muscles of the throat such as less than 20 tone if you want to take LSE training. If you do LSE training with stiff muscles, soft tissues within the muscles, the fascia or the ligaments might be damaged.
In fact, many people visit me at my voice care clinic who have damaged their muscles, after doing similar exercises starting off with stiff muscles.
You need knowledge to know which muscle you aim to train and experience to control how much strength you have to slide the larynx.
Note2:No one feels well or confident doing LSE exercises in the beginning. This is because the muscles relating to vocalization are voluntary muscles. For many people it is really difficult to gain the confidence to control them by yourself, due to the fact that you can not always sense which muscle is moving and/or if it’s moving in the correct direction. However, if you keep doing LSE training exercises, you will become able to master it gradually with great rewards for your voice and singing.