While you are not allowed to submerge the bracelets in water (swimming pools, hot tubs, the bath tub), you can shower, and in fact you need to shower in order to keep the area around the bracelet clean.
You can’t wear anything that would go between the skin and the bracelet. You can wear boots or leggings over the top, but be cautious that boots could cause the bracelet to rub and even create a blister.
Exercise will have no impact to the functions of the bracelet. For comfort, you might want to wear a sweat band or a sock rolled down to prevent the bracelet from “bouncing” on the ankle bone. Just make sure nothing gets between the bracelet and leg.
You cannot wear a monitoring bracelet if you need an MRI. You will need to contact your supervising agent prior to a scheduled appointment to make arrangements to have the bracelet removed prior to the procedure. Your agent may have additional requirements.