Lindsay, 57, is a qualified pilates instructor and teaches 15 sessions a week in village halls across York.
Pilates was invented almost 90 years and combines special breathing techniques with muscle stretching to improve flexibility, strength and balance as well as induce relaxation. Lindsay says its growing popularity stems from the fact it is suitable for men and women of all ages and levels of fitness and ability.
"It's a gentle form of exercise, which can also be strenuous," she says. "It can be tailored to suit all levels of ability and fitness, from an 80-year-old to a fit person who wants to improve their performance."
Pilates has a number of celebrity followers, with Jennifer Aniston, Gwyneth Paltrow, Sharon Stone and Uma Thurman all reported tobe devotees.
But it is not only for women. Patrick Swayze, Hugh Grant, Tiger Woods and tennis ace Pat Cash are fans, too.
This is an ideal form of exercise for anyone with back or joint problems because it is low impact, and many of the exercises involve lying on a mat.
"It's excellent for lower-back pain," says Lindsay. "It strengthens the muscles that support the spine and strengthens the abdominals too. It encourages you to stand in the correct way and to hold your body in the right manner, whether standing or lying down."
It is also a great exercise regime for women who want to work on their pelvic floor and tummy muscles following pregnancy, she added.
Lindsay credits pilates with curing her own lower-back pain and a knee injury from skiing. "I was amazed at how quickly my fitness levels came back. My knee no longer gave me any problems and I dropped a dress size."
She was so impressed with the results she gave up a career in business to retrain as a pilates instructor.
Now, six years on, demand for her to run extra sessions has led her to set up her online classes, which are ideal for all levels, including beginners.
"This is the first website specific to pilates," says Lindsay.
For £9.99 a month, users can access the site, which has a range of video workouts featuring Lindsay, with new ones added regularly.
"Pilates is good for so many people," says Lindsay. "And you can do the exercises at home - you don't need a lot of space."
You can even do pilates stretches at work - in a short five-minute film, Lindsay shows how you can loosen tight shoulders and legs from the comfort of your office chair.
There is also a short routine perfect for anyone who feels like having a stretch after a long journey or a tiring day, which Lindsay says would be ideal before going to bed.
She said: "Not only will we regularly be updating the site with new workouts, we also offer a support service where people can email us with their queries on the exercises or anything else they want to know about pilates. That's not something you get with a DVD."