Meet the Flex Core 8: a handy tool that lets you sculpt and tone your upper and lower body. It has a compact, portable design, so you can perform cardio and strength training anywhere. You can adjust it to adapt to your fitness level.
Flex Core 8 is not going to completely replace your need to visit a gym, but it could give you a workout when you are traveling or running low on time. Costs under $100 at this time.