Tanita BF680W Duo Scale Plus Body Fat Monitor with Athletic Mode and Body Water

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imageThe current trend in scales is to give us even more information to help us to achieve our personal best fitness levels. I know, wasn’t knowing my weight bad enough? Now I know how much more I’m out of shape. To give us this extra incentive to improve our health, technology has advanced and added information to our current scales so that we can be more efficient at losing weight and becoming fit.

Monitoring Body Fat and Weight

This particular unit measures weight, body fat and body water percentages. It also calculates the number of calories necessary to maintain a user’s current weight and a recall feature that compares current weight and body fat readings to previous ones.

Why Monitor Water?

How many of us have heard some magic number, like 16 glasses of water a day? Or even 8? While I’m not sure that there really is a magic number, I would be willing to bet that most of us are not drinking enough water each day. Supposedly, if you’re thirsty, your body is already mildly dehydrated. All day, every day, our bodies lose water. We sweat, we urinate, and we even expel water in our breath. The amount varies, dependent on multiple conditions, but whatever they are, we are losing water. If we could just get a handle on the appropriate amount of water we need, we would be healthier and feel better. Water is found in every cell of our bodies. It is vital to our bodies working properly and avoiding health problems. For a woman, a healthy body water percentage is 45-60%; for a man it is 50-65%.

Ew… Body Fat

Am I the only one who remembers that Oprah episode where she pulled a wagon full of something that was supposed to represent her fat loss? It was disgusting. Anyway, high levels of fat in your body can increase your risk for heart disease, cancer, diabetes, and a host of other diseases. It is important to know where you stand on the body fat percentage graph. This percentage indicates the proportion of your body weight that is fat.

Bioelectric Impedance Analysis (BIA): WARNING

To measure body fat, the unit actually sends a very low level electrical signal through the body. For this reason, pregnant women (effect on fetus is unknown) or individuals who have pacemakers or other implanted electronic devices as this may interrupt the normal signal or rhythm, should NOT use this option. This device is also not intended for athletes as their body composition is different than the target user (adults with inactive to moderate lifestyles and/or athletic body types).


  • Calibrated for adults and children over seven years of age
  • Stores data for two users
  • Measures body fat in 0.1 percentage points
  • 2.25 inch LCD screen shows weight and body fat concurrently
  • Compares values to healthy ranges based on age and gender
  • Approved for users up to 300 pounds
  • 3 year warranty


The Healthy Range Indicator provides a fast, visual cue as to your body fat and how it compares to the Healthy Body Fat Range Chart in the manual.

  • (-) Indicates below the healthy body fat range and a risk of health problems.
  • (0) Is healthy. The body fat percentage is appropriate for the users age and gender.
  • (+) Overfat and above the healthy body fat range. This also presents the risk of health problems.
  • (++) Obese and significantly above the healthy body fat range. This reading indicates a high risk of obesity related health issues.

What Do You Think?

I like to ask for opinions before I make a purchase. Here’s what people are saying about the Tanita BF680W Duo Scale Plus Body Fat Monitor with Athletic Mode and Body Water that has earned it a 4.2 out of 5 star rating.

Users were universally happy with the ability to track changes in body fat with the Tanita BF680W Duo Scale Plus Body Fat Monitor with Athletic Mode and Body Water. One user recommended checking each day at the same time and then tracking your weekly average. Unlike some monitors, the batteries seem to have a long life. One user reported that they had lasted over a year with both he and his wife using it. A fitness trainer even tried it out and compared it to those calipers they use in gyms. The results were very close and the user recommended it because you can see whether your percentage is going up or down.


Those who didn’t like the unit seem to think that their body fat percentage is reading to high. I don’t know if this is related to the unit itself or the unwillingness to accept the numbers…


The Tanita BF680W Duo Scale Plus Body Fat Monitor with Athletic Mode and Body Water is currently in stock at Amazon.com.

About Andy

Andy writes for a number of health related sites but has always been fascinated by alternative medicine and home remedies. His deep interests in nature and the body's innate ability to heal itself (given the right condition) have lead him to a pivotal time in his life - and so, Holistic Home Fitness was born. While it's relatively new at the moment, Andy wants to build this site into a huge reference site for a more holistic approach to health and fitness.