I switched from leggings to proper athletic pants a while back and it's been much better for comfort. Qynda has a solid pants collection with different modest styles — some relaxed straight-leg options, others with a bit more taper but still full coverage and high waists. The fabric moves well, doesn't cling when you sweat, and they have pockets which is a huge plus. I've been rotating a couple pairs for strength training and brisk walks. Their pants section has several choices that feel more put-together than typical sweatpants https://qynda.com/collections/pants — might be what you're searching for.