I think the reason she hates exercise, apart from being lazy, is the fact that she associates exercise with gyms, classes, personal trainers and swimming pools. And she hates people, and assumes they are all looking at her and judging her.
She won’t go to the gym because she thinks men want to stick their penis’ in her, she hates classes because bitchy girls won’t let her join in. She’s too full of self hatred to be seen in a swimming costume. And she’s too lazy to go walking. She can’t motivate herself to get stuck in to home work outs, because Netflix and food is more tempting.
Besides, I thought she said any type of exercise aggravated her ‘pain’ and she throws up.