Couple of observations about that. First, here in Thailand the vast majority of massage therapists are female and they are in your weight range, and many times even less than 55 kgs. They all manage to work just fine on all those tens of thousands of mostly much heavier foreigners who are in Thailand. The secret is to learn how to use your body weight effectively, and you will learn that in this course and in all the others.

That being said, there is no doubt that it is harder to work on much heavier people. The way to deal with this is that you do not use all techniques on them, but only those which you can do without using too much effort.

As you will hear me say many times throughout this course: You are not supposed to use every single technique on every single person.

The techniques are options to choose from, not mandatory sequences. 

Sure, you should know them all, but when you work on a particular client, you decide if you want to do a particular technique or not. And if a certain technique takes too much effort on a large client, you simple don't use it in this case. There are hundreds of techniques in Thai Massage. You will never be able to use them all in one session.

Also you will see that for many techniques I give you alternatives for different bodies, weights and sizes.