Life also makes a 17-inch attachable TV and numeric remote control with LED consoles and an integrated 15-inch LCD with touch screen technology and built-in TV.

This equipment also comes with a USB port, which makes it possible to keep a memory of each workout, which makes it possible to compare days and workouts.

Circuit training is also getting the attention of equipment manufacturers, with one of the focal points being on independent action. Each individual has a strong and a weak side to his or her body. If the weight machine is connected to one weight system, then it is common for the strong side to pull more than the weak side.

Each side pulling equal weight leads to better body symmetry and equal stress load. One side is not overcompensating, which is better for the body and back.

New machines are also going to lighter weight adjustments, meaning instead of adjusting weights in 5-pound increments, it is possible to make smaller jumps of 2 1/2 pounds, which makes increases more comfortable.

This is particularly important for women. With lighter weight adjustments, they don't have to make such dramatic jumps in weight as they increase their strength.

"A lot of the baby boomers are finding more time to work on fitness. They're doing more toning for better joint protection, so today's equipment needs to be able to meet those needs. Functions and angles make it possible to work the different muscle groups more efficiently and comfortably," Carter said.