There is a big difference in how much us humans sweat. This depends on our genetics, weight, gender, age, lifestyle etc. No matter how much you sweat, you can be absolutely sure of getting beneficial effects from the treatment. There is not a linear relationship between amount of sweat and treatment effectiveness. If you would like to sweat more, you can extend the treatment time and/or increase the temperature. If you feel that you are sweating too much during the treatment, you can advantageously zip up the blanket a little or have your arms outside the blanket. The most important thing is that the treatment is comfortable for you.