Anti-Snoring Trainer – Getting Started For which types of snoring are anti-snoring trainers are helpful? What is the difference between “active” training devices and “passive” aids, such as mandibular advancement devices (MAD) or nasal dilators? Which aids are most effective? How long does it take to notice the positive effects of anti-snoring training or even eliminate snoring altogether? Once you have successfully completed the anti-snoring training (i.e. stopped snoring) , should the anti-snoring training, nevertheless, be continued?