Aerobic exercise is any movement that uses the large muscles of the body to raise your heart rate. Options including walking, dancing and biking.

Testing your muscle endurance takes longer than testing strength, and it will make your muscles burn.

Working out at home saves you time and money. Target your chest and biceps with these easy at-home exercises.

The plyometrics workout in P90X is one of the most difficult workouts that they offer and includes five groups of high-impact exercises.

Step machines can go a long way toward helping you achieve your fitness goals but you'll need to round it out with upper body work.

There are innumerable ways to arrange a circuit training class. Know the basics and get creative.

Build a bigger butt by building your glute muscles. Lunges, squats, step ups, hip extensions and hip thrusts are the best butt-building exercises.

Squats, split squats, lunges and step-ups can replace leg extensions if you don't have access to the machine or you have bad knees.

Carrying excess wait can make your low back pain worse. Exercise at home to make your back stronger and lose the pounds.

Any activity that gets your heart rate up to burn calories and improve heart and lung function is a cardio activity.

There are many convenient, at-home exercises that can be used to build strength and definition in your legs.

Aerobics class is extra challenging when you don't know the lingo. It varies from region to region, but some of the most common names of moves are consistent.