Answer
I would suggest keeping the exercise equipment in a seperate room, that is mostly off limits (such as a master bedroom, spare room, or basement) and using it at a time when you do not need to monitor your child-- e.g. when it is napping. Or, alternatively, you could workout while s/he is in a playpen. It is good for you to realize that exercise equipment has many small moveable parts and are not safe for a baby. That being said, I am sure those big exercise balls would be harmless and maybe even fun for a toddler! Yoga and aerobics are also good alternatives that do not require equipment-- just a DVD!