I'm currently having some issues in class. The more that I am taking part of fitness outside of Martial Arts, the more I'm noticing issues with technique when fellow students are taking part in fitness and warm ups at my club. I'm not sure what to do as this is quite difficult for me, knowing that some of the people in my class could be shown a much better way of doing certain exercises. For example, I see a lot of people (especially junior's) bending their back when doing squats or throwing their arms forward with sit ups and straining their necks. Not sure what I should in regards to this, whether to speak up or just let it carry on rather than come across as patronising?