I've had terrible eczema since infancy, it's hereditary, and although it has improved over the years, I am constantly mindful of it...and should own stock in hydrocortisone cream! Several years ago, I stopped eating dairy and meat (except for fish) and stopped using soap--yep, I stopped using soap in the shower and only shampoo my hair once weekly. I still shower twice per day due to workouts, but am extraordinarily careful which products I use. Ever since, I've only had a few mild flare-ups that are easily controlled with OTC hydrocortisone.
So my advice is to avoid soap and limit washing your hands with it as much as possible, use coconut oil and gentle lotions like crazy, and if you're a perfume-lover like me, only spray it on your clothes. The single most important thing you can do is moisturize the crap out of your skin head to toe twice a day. Also consider changing laundry detergents, I'm pretty much exclusive to Purex Naturals. I think this may be the cause of most of the ankle rashes since your socks are pretty tight on your skin all day long.
Product recommendations: St. Ives oatmeal & shea body lotion, Eucerin calming body wash (which is essentially oil and does not really lather), Cetaphil for facial cleansing (Walmart makes a great generic), and all the coconut oil you can get your hands on. Co-washes are fantastic for keeping the hair greasies at bay and they're pretty prevalent of late; try L'Oreal Ever Crème cleansing conditioner. Your skin will thank you and you'll feel SO much better!
And box fans on high are a must for workouts, you definitely don't want sweat hanging out for long. Hope all this helps!!!