Hmm. How can I make an interesting article about the thickness of mirrors? How can I make it informative without having you guys fall asleep when I start describing the thickness of glass?
Well, if you go to the gym and look in the mirrors or if you try clothes on in a clothes shop then you might find it rather enlightening. And I’ll not get too technical. Promise.

Leonardo Da Vinci said “The mirror is our teacher.” He was referring to the mirror being used as a fresh eye. When I train a client in a gym I will often look in the mirror at my client’s form instead of looking directly at them. Apart from the fact that it can be off putting having someone (even your PT who you trust) staring at you as you struggle through your set, me looking through the mirror gives me a different perspective on their form. I see things differently. We can lose perspective with the naked eye. Reflections can create new ones, especially with the thickness of a gym mirror which should be above 5mm in thickness.
Due to health and safety, public mirrors must be of a certain thickness and be safety backed. Therefore this thickness can give us a much better perspective of the reality that it portrays. Whereas a domestic mirror might only be 3mm in thickness. This can create a mottled effect on the glass and give a distorted view of what we see, especially in cheap mirrors that are mass produced.
Trainees have often said to me,”I look great in the gym but when I look at myself at home I feel rubbish again!”
This is the reason why. The gym mirror will be a true reflection. Your home mirror is probably a much cheaper, thinner piece of glass.
Artists often use mirrors to get a new perspective of their paintings. It takes away the peripheral clutter and enables the eye to focus on the subject. Training in the gym shouldn’t be any different. Your workout is your art. You have a blank canvas to work on and produce your own work of art. Mirrors can help. Whether wanting to build muscle or lose weight, often looking in a good mirror can give you a much better idea of your progress than the weighing scales.
I’m hoping that, one day, mirrors will become so thick that it will make me look like I have a fringe. But maybe that’s an art that might be a little bit too much of a stretch.