We have a rule at our school that if you are more than 10 min late you can't take class.
It's funny you mention this because today we got a lecture about quiting and not doing the entire workout, which I've been known to do; give up/not finish crunches, jumpropes or inchworms just because I can't breathe (overweight) and am 2-3x older than most of the students who just rush through the warmups. But today I finished everything! even though I was the last one finished and they were all looking at me waiting for me to finish. I felt really good! I think you did the right thing.
It's funny you mention this because today we got a lecture about quiting and not doing the entire workout, which I've been known to do; give up/not finish crunches, jumpropes or inchworms just because I can't breathe (overweight) and am 2-3x older than most of the students who just rush through the warmups. But today I finished everything! even though I was the last one finished and they were all looking at me waiting for me to finish. I felt really good! I think you did the right thing.