You may have noticed in your weight-loss (or weight-gain) efforts that you body tends to stick around a certain weight range. So what gives? Here's what science tells us.

The medical community uses the terms "desirable weight" and "ideal weight" interchangeably and assesses both via weight-for-height tables such as the Metropolitan Life Insurance Company's weight-for-height table and the body mass index table, according to the textbook "Essentials for Health and Wellness."

There isn't one weight that's ideal for every woman over age 60. What a woman should weigh depends on a number of factors, including her height and frame size. It's also possible to be of a normal weight but have a high of body fat percentage, which can sometimes happen as women get older and lose muscle mass.

It’s not so much which exercises you do, it’s how you structure your workouts, taking into account exercise order, reps performed and rest periods taken.

The high school years are full of transition for teens. Not only are they learning how to drive, manage school, make friends, and work, they are also growing in height and weight. Even at 16, both boys and girls are still experiencing growth sports -- some more than others.

Determining the average weight and height of a 15-year-old is not an exact science. Since teens are still growing, especially in regards to their weight, it can be difficult to assign an average number. That's why body mass index is often when looking at the health status of a teenager.

Determining what a normal body weight for a 5'4'' girl is can be determined by using height-weight charts, body mass index and ideal body weight equations.

Average heights and weights by age can determine normal development and indicate possible health conditions.

There was a time in my life when I would weigh myself multiple times a day. Every half of a pound lost or gained was either a victory or tragedy, respectively.

Experts explain your what your true “happy weight” is and how to love yourself just the way you are from the inside out.

Women who are 5 feet 8 inches tall have ideal body weights higher than women of shorter statures. Normal weights for women who are 5 feet 8 inches tall are determined using frame size, activity level and body mass index, or BMI.

Many of us dream about dropping enough weight to have a flat, bikini stomach, but unless you’re already thin, it will probably take longer than a week. Shrinking your belly is dependent on lowering your overall body fat percentage and that takes time, depending on what your starting point is.