It seems that you have the worst cramps ever and it is impossible to get moving. Your back might break if you move a bit. You are too tired for working out and the only way out is rest day!
You're out of workout clothes and there is nothing else that you can wear for gym. No clothes, no gym day! You can catch infections wearing dirty clothes. Better take a break and give time for muscles to repair.
You're running super late and missing exercise is the only way to make up for the lost time. You have to miss workout session. Attend to what it is important.
It is a friend’s birthday dinner or an anniversary celebration, and you wouldn’t have any time for exercise. It's a day of celebration, make it a special day for them. And, give 5 minutes for freehand exercises.
Skip your workout if you suspect you're injured. You should feel your best to give your best shot.
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