The equipment should suit your needs and fitness level. It's important to ask yourself, "What do I want to accomplish?" It may be improvement of your cardiovascular system, more strength in your upper body or to increase your flexibility. Based on this you can determine the equipment that is best for you.
For the best results you should include equipment for strength, flexibility and cardiovascular training.
Strength training equipment
Strength training equipment can come in the form of multi-station machines, free weights or bands and tubing.
Flexibility equipment
For flexibility training a simple mat will be sufficient. Even a mat isn't necessary if you have a carpeted floor. Also popular are cloth or nylon straps that aid you in your ability to stretch. They assist you in pulling the muscle through its full range of motion.
Cardiovascular equipment
When choosing cardiovascular equipment you have many options. They include treadmills, bikes, stair climbers, rowing machines, ski machines, elliptical trainers and more. The piece of equipment you choose is up to you. Choose one that you and the whole family will enjoy. You also need to ask yourself whether the particular piece of equipment is appropriate for you. What I mean by that is this: If you've had several knee surgeries, then a treadmill may not be your best option due to the impact and continuous pounding your joints endure. In this example, a bike may be the best choice, because there is no impact. Whatever the case, make sure you choose something you enjoy and are challenged by.