Fitness experts say many people become bored with the same workout routine after a while. For instance, someone who has been running on the treadmill three times per week for the past few months may start to dread his or her exercise sessions.

In addition, the body becomes used to certain exercises after a certain amount of time and individuals no longer see the results they want.

"That's the time to find another activity that works," personal trainer Bill Coyle recently told NorthJersey.com.

While varying your activities is a great way to avoid become mentally and physically bored, trainers say it is important to stick with a particular program in order to see results.

"We call it training A.D.D. (for Attention Deficit Disorder)," personal trainer Marshall Roy recently told Reuters. "They hop around different styles. It doesn't work. How would you know if you're making progress if you're always changing? Consistency is how you track your progress."

Roy told the news source that individuals should stick with an exercise regime for at least eight weeks in order to see if it works for you.

Those who need to purchase exercise or sports gear to keep their workouts varied should consider used sports equipment and used fitness equipment to save money.