you are interested in applying for the position of yoga teacher in a reputed physical fitness centre. write a formal letter of application to the secretary of the centre expressing your interest in position
Here is a Sample letter for your case-
I came to know about your yoga academy through a newspaper advertisement and I am genuinely interested to know about the recruitment facilities available at your center.
I have been practicing yoga since the last 5 years and had in training students at Davar Yoga classes since the last two years. So, I wish you could provide me an opportunity to show my calibre.
Hoping for a positive reply from your side."
Hope it helps you!