What's best to track when losing weight besides weight: 7 indicators

If tracking just one additional metric besides weight, waist circumference is usually the most useful. It reflects changes in abdominal fat and provides information about cardiometabolic risk that a single number on the scale doesn't provide. However, to fully assess progress, it's better to use a smaller set of metrics rather than just one: waist circumference, physical activity, strength and performance, diet, and—if medically indicated—blood pressure and lab values. [1]

Modern approaches to treating overweight and obesity are gradually moving away from the idea that success is simply a matter of losing weight. The European Association for the Study of Obesity recommends also assessing fat distribution, medical complications, physical function, psychological well-being, and quality of life. A similar approach is used in the 2026 American Standards of Care. [2]

This is especially important during strength training. Two people may lose the same 5 kg, but for one, a significant portion of the loss will come from fat, while for the other, it will also come from lean mass. Conversely, weight may change slowly, even though waist circumference decreases, strength increases, and body composition improves. [3]

Why weight doesn't tell the whole story

The scale only answers one question: how much your entire body weighs now. It doesn't explain what portion of that mass is fat, muscle, water, bone, glycogen, or gastrointestinal contents.

This is why body weight can temporarily stagnate even when body fat actually decreases. Water and glycogen stores can also change, and regular strength training is better at maintaining or increasing lean mass.

The opposite is also possible: weight drops quickly, but some of the initial loss is water weight, not just fat. Therefore, a single morning reading on the scale is much less informative than a trend over several weeks.

At the same time, weight remains an important indicator. Current recommendations don't recommend abandoning it—they suggest not relying solely on it for all outcomes. The 2026 American Standards of Obesity Care recommend monitoring anthropometric indicators during treatment, along with vital signs, laboratory data, and lifestyle factors. [4]

Waist circumference is the most important indicator besides weight.

For most adults, this is the most useful addition to home weighing.

The reason is that the location of fat tissue matters. Excess fat accumulation in the abdominal area is associated with a higher risk of type 2 diabetes, hypertension, and cardiovascular disease. Therefore, modern recommendations increasingly use waist circumference or waist-to-height ratio along with body mass index. [5]

NICE guidelines recommend that waist circumference be taken into account in adults with a body mass index below 35 kg/m², and the waist-to-height ratio is used as a practical measure of central obesity. The European Association for the Study of Obesity also includes abdominal fat distribution in its current model for diagnosis and risk assessment. [6]

For self-measurement, NICE recommends finding the lower edge of your ribs and the top of your iliac bones and measuring your waist approximately halfway between them after a normal exhalation. The measuring tape should be held horizontally and not pulled tight around your stomach. [7]

Waist-to-height ratio

Another convenient indicator is calculated very simply:

Waist circumference ÷ height.

For example, if your height is 175 cm and your waist is 96 cm:

96 ÷ 175 = 0.55.

NICE classifies a waist-to-height ratio of 0.4-0.49 as no increased risk, 0.5-0.59 as elevated central adiposity, and 0.6 and above as even higher. The NICE rule of thumb for adults is to keep waist circumference less than half your height. This scheme applies to a body mass index below 35 kg/m². [8]

But when losing weight, hitting a certain threshold is not the only goal. A gradual reduction in waist size provides information about the direction of change.

Why a slimmer waistline may be more important than a small weight change

Let's imagine that in two months, your body weight has decreased by only 2 kg. At first glance, the result may seem small.

But if, at the same time, the waist circumference has decreased by several centimeters, the person has begun to walk faster, climb stairs more easily, and has increased the working weights in strength exercises, the picture looks completely different.

A meta-analysis of 116 randomized trials involving 6,880 overweight or obese adults found that increased aerobic activity was associated with reductions not only in body weight but also in waist circumference, body fat percentage, and visceral fat area. Changes in these measures were not necessarily proportional to the kilograms on the scale. [9]

This is why modern obesity management focuses not only on kilograms, but also on fat distribution and health status. [10]

Should I track my body fat percentage?

It is possible, but this indicator is significantly less accurate than it seems from the number on the screen of household scales.

Home "smart" scales typically use bioelectrical impedance. They directly measure the electrical properties of tissues and then calculate body fat percentage using an algorithm.

A 2026 systematic review compared bioimpedance with a four-component model of body composition. The average bias across methods was often only a few percentage points, but individual limits of agreement often ranged from approximately 15 to 20 percentage points. This means that a relatively good average result for a group does not guarantee an accurate result for a specific individual. [11]

A study of 15 bioimpedance devices also found that many of them produced highly reproducible repeat readings, but their ability to correctly determine absolute body fat percentage and actual changes over time varied markedly.[12]

Therefore, a change in the household indicator, for example from 29.8 to 29.2%, does not yet prove the loss of fat tissue.

If you already use such a scale, it's best to measure yourself with the same device under similar conditions and consider body fat percentage only as an additional, multi-week trend, rather than as a primary weight loss goal.

Strength is an underrated indicator of progress.

When losing weight, it's helpful to keep track of not only how much weight you're losing, but also whether you're maintaining your physical strength.

Energy deficiency not only reduces fat tissue. Loss of lean mass is also possible. This is especially important in older adults, during significant calorie restriction, and during rapid weight loss.

A 2025 meta-analysis of 25 randomized trials found that adding strength training to dietary weight loss did not significantly enhance overall body weight loss compared to diet alone. However, strength training was better at preserving lean mass, increasing fat loss, and improving muscle strength. [13]

This creates a paradox: someone who only looks at weight may decide that strength training “doesn’t help you lose weight” because the weight doesn’t drop any faster.

But from a body composition perspective, the results may be more favorable.

Therefore, it makes sense to track several similar exercises: for example, workload, number of repetitions, or the ability to perform a familiar exercise without deteriorating technique. Don't turn this into a sports test—the important thing is the trend.

Physical performance sometimes speaks louder than kilograms

The modern concept of obesity treatment directly includes functional status in the assessment of results.

The European Association for the Study of Obesity recommends assessing physical function using a clinical interview, appropriate questionnaires, or exercise testing when appropriate. The goal of treatment is considered broader than weight loss and includes improving function and physical fitness. [14]

At home, you don't need a laboratory test for this.

You can compare the same route: how quickly you complete it and how tiring it is. You can note how many flights of stairs you can climb without stopping or how much easier ordinary household tasks become.

Standardization is especially useful here. The result "I feel stronger today" is difficult to compare after several months. However, the time spent completing a single route or the workload performed provide a much clearer trend.

Steps and Active Minutes: What's Best to Track When Losing Weight?

Both are useful, but they answer different questions.

Steps represent the amount of normal daily movement. Active minutes help you measure the amount of moderate and intense activity.

Current physical activity recommendations focus primarily on time and intensity: adults are recommended to do at least 150-300 minutes of moderate aerobic activity per week, or 75-150 minutes of vigorous aerobic activity, or an equivalent combination of the two. Strength training is also recommended. This means that simply counting a high number of steps does not fully capture physical activity. [15]

To track weight loss, it's helpful to choose one simple indicator of daily activity—for example, the average number of steps—and one indicator of exercise: the duration or number of exercise sessions.

There is no need to monitor dozens of watch characteristics every day.

Why it's useful to track not only results but also behavior

Weight and waist size are results, but they change slowly.

Nutrition and physical activity is a process that is happening today.

Therefore, if your weight hasn't changed much over the course of a week, it's more useful to first look not at the extra tenths of a kilogram, but at how well you've met your plan.

Current standards of care for obesity recommend monitoring behaviors related to diet, physical activity, and sleep, and identifying barriers that prevent adherence to the chosen strategy. [16]

A systematic review of digital self-monitoring found that simultaneous tracking of diet and physical activity in behavioral programs was associated with greater weight loss, increased moderate activity, and decreased energy intake compared to control conditions. Studies were heterogeneous, so specific findings cannot be generalized to each individual, but the direction of the effect supports the principle of self-monitoring. [17]

Another 2024 meta-analysis found that feedback in self-monitoring programs could further improve physical activity, although evidence on which feedback format is optimal remains mixed.[18]

What exactly should you track in your diet?

You don't have to record every calorie for the rest of your life.

For one person, the main obstacle is sugary drinks, for another - evening snacks, for a third - large portions, alcohol or regularly eating out.

Therefore, it is better to choose a process indicator from the behavior that is actually related to your weight loss program.

For example, someone might track the number of days they adhered to a pre-determined eating plan. Another might prefer to track the regularity of their meals or the number of unplanned snacking episodes.

The value of such a record is that it allows us to distinguish between two fundamentally different situations: the plan is being implemented, but the results are slow, and the plan is not actually being implemented. The solutions in these cases will differ.

Should I count calories?

Counting calories can be a useful tool, but it is not a requirement for successful weight loss.

If food tracking helps you see portion sizes, energy-dense foods, or regular, unnoticed snacks, it's doing its job.

But the absolute figure "1637 kcal eaten today" shouldn't be taken as a laboratory measurement either. Labels, recipes, portion sizes, and food databases are subject to error.

The same goes for "calories burned" on fitness watches: devices estimate energy expenditure algorithmically, so you shouldn't automatically compensate with food for all the calories the watch reports as burned.

For behavior control, consistency of method is more important than the illusion of absolute accuracy.

It makes sense to track sleep too, but don't turn it into a competition.

Current obesity treatment standards include sleep and stress among factors that should be assessed along with diet and physical activity. Insufficient and disrupted sleep can make it difficult to adhere to a program and manage eating behavior. [19]

This doesn't mean everyone needs to buy a ring and strive for a perfect Sleep Score.

For practical monitoring, it is often sufficient to know the average duration of sleep, the stability of the regimen, and the presence of pronounced daytime sleepiness.

If a sleep app causes anxiety or a person begins to constantly change their behavior in pursuit of ideal numbers, the tracking itself ceases to serve a useful function.

Hunger and satiety can be more beneficial than another number

If weight loss is accompanied by constant intense hunger, breakdowns, and obsessive thoughts about food, this is important information even if the scale shows good results.

On the contrary, a strategy that produces moderate, stable weight loss without constant hunger and that can be realistically maintained for months is usually more practical than a very quick result that is impossible to maintain.

Therefore, some people may find it helpful to periodically assess hunger, satiety, episodes of overeating, and cravings for certain foods.

This is especially important if a person is being treated for obesity pharmacologically: the goal of modern therapy is not just weight loss, but a sustainable improvement in health with acceptable tolerability and the ability to continue treatment. [20]

Blood pressure: an important indicator if it is elevated

If you had high blood pressure or were diagnosed with hypertension before losing weight, the dynamics of your blood pressure may be more important than a few extra pounds.

The 2026 US standards include blood pressure measurement in the comprehensive assessment of overweight and obese adults.[21]

A meta-analysis of 35 studies with 3,219 participants found that weight loss was associated with reductions in both office and ambulatory blood pressure. The effect was greater with greater reductions in body mass index. [22]

Therefore, a person with hypertension can simultaneously observe two positive trends: a decrease in body weight and a decrease in average home blood pressure.

However, it's not recommended to independently reduce the dosage of antihypertensive medications based on good results. If significant weight loss occurs, treatment adjustments may sometimes be necessary, but this should be done in consultation with a doctor.

Glucose, glycated hemoglobin and lipids

These measurements do not need to be taken every week, but for people with prediabetes, diabetes, dyslipidemia, or high cardiometabolic risk, they are important medical outcomes.

The 2026 American Standards call for assessment of glycated hemoglobin, lipid profile, and, when appropriate, liver function tests and other obesity-related complications.[23]

In people with type 2 diabetes, a few percent reduction in body weight from baseline can already improve glucose control and intermediate cardiovascular risk factors, and greater sustained weight loss usually provides additional benefits. [24]

Therefore, the situation “I only lost 7% of my weight” may look completely different if, at the same time, glycated hemoglobin levels have significantly improved, blood pressure has decreased, and my waist size has decreased.

The frequency of laboratory testing is determined by underlying medical conditions, medications, and the patient's medical situation. Frequent testing simply for motivation is usually unnecessary.

Are liver function tests necessary?

Not everyone.

However, obesity is closely associated with metabolically driven fatty liver disease. Therefore, in modern clinical assessment, alanine aminotransferase, aspartate aminotransferase, platelet count, and fibrosis risk scores are considered in the presence of relevant risk factors; further testing is indicated as needed. [25]

This data is medical monitoring, not a home weight loss indicator.

They are particularly useful when one of the treatment goals is to improve a specific complication of obesity.

Quality of life is also a real result

Modern obesity medicine increasingly views the ability to live and function normally as a full-fledged end goal of therapy.

The European Association for the Study of Obesity clearly states that treatment goals should go beyond weight loss and include improvement of obesity-related complications, physical and social function, psychological well-being, physical fitness and quality of life. [26]

Therefore, you can ask yourself very specific questions: has it become easier to walk, has the pain during movement decreased, is it easier to climb stairs, are long walks better tolerated, is it easier to do household chores.

These are not "less scientific" results just because they can't be seen on a bathroom scale.

Why clothes and photos can still be useful

They are not medical measurements, but can complement objective indicators.

If the same clothing becomes looser while the weight remains stable and the measured waist decreases at the same time, these observations are consistent with each other.

Photographs can also show changes in body shape, but they can be easily distorted by lighting, posture, distance from the camera, and clothing.

Therefore, photographs are best considered an additional visual record rather than a way to measure body fat percentage.

What to do if your weight is stagnant and your waist is shrinking

This is usually not a reason to automatically assume that weight loss has stopped.

If waist size consistently decreases under stable measurement conditions and physical performance and strength are maintained or improved, favorable changes in body composition are possible.

This is especially likely with a combination of moderate energy deficit and strength training. In a 2025 meta-analysis, strength training during dietary weight loss improved the ratio of fat to lean mass loss without causing greater total weight loss.[27]

However, short-term stability in weight and waist size does not necessarily prove "body recomposition." A trend over a sufficiently long period is needed.

If your average weight, waist size, or other objective indicators remain unchanged for a long time, then it makes sense to reconsider your actual diet and activity.

What to do if you're losing weight but your waistline remains the same

One or two weeks means little.

Waist measurement is affected by tape position, breathing, bowel contents and bloating.

If weight loss is consistent over months and waist size remains consistent with standardized measurements, it may be worth reviewing the measurement technique and considering other indicators of body composition and health.

Current recommendations do not require that weight and waist size decrease in strict synchrony. They are viewed as complementary indicators. [28]

You don't need to track everything at once.

Too much data rarely makes a program better.

Weight, body fat percentage, visceral fat, water, muscle, calories, steps, active minutes, resting heart rate, heart rate variability, sleep, readiness, and a dozen other metrics make losing weight a breeze—like working on a spreadsheet.

Behavioral research supports self-monitoring, but its benefits are primarily related to feedback and behavior change, not to the maximum number of numbers collected.[29]

If a metric doesn't help you make a decision, it may not need to be tracked at all.

Minimum set of indicators for weight loss

For most adults without complex medical conditions, a fairly compact system is sufficient.

What to track	For what	How to interpret
Average weight dynamics	total energy result	look at the trend, not the specific day
Waist circumference	change in central obesity	measure in the same way
Physical activity	behavioral goal fulfillment	steps, active minutes, or workouts
Strength/performance	preservation of function and muscle mass	compare identical loads
Implementing a meal plan	understand the reason for the result	choose 1-2 really important behaviors
Body fat percentage on the scale	additional trend	do not consider the absolute figure to be accurate
Pressure	if you have hypertension or are at risk	focus on average values
Tests	if there are medical indications	evaluate together with the doctor
Well-being and function	quality of the result	energy, mobility, quality of life

The goal of this system is not to obtain a perfect set of numbers, but to understand in a timely manner whether the chosen strategy is working and what exactly needs to be changed. This approach is consistent with the modern shift from a purely weight-centered treatment model to an assessment of health, function, and complications. [30]

How often should all this be measured?

There is no universal scientifically established frequency for each home indicator.

Body weight can be measured more frequently because individual measurements fluctuate widely and can be used to construct an average trend. Regular self-weighing is a common component of many weight management programs. [31]

There's no need to measure your waist daily: real changes occur much more slowly than the measurement error. In practice, it's sufficient to check it regularly under the same conditions and assess the long-term trend.

Strength or physical performance can be conveniently compared over repeated workouts or test routes.

Laboratory parameters and blood pressure are monitored based on specific diseases and prescribed treatment, and not out of a desire to get another progress number.

A convenient "result - behavior - health" system

Instead of a dozen unrelated indicators, it is useful to divide the data into three levels.

The result: average body weight and waist circumference. These show what's actually happening with your body size.

Behavior: nutrition, steps or active minutes, exercise, and sleep if needed. These metrics explain why the results were as they were.

Health and function: strength, endurance, blood pressure, lab values, well-being, and quality of life. They answer the key question: are people not only getting lighter but also healthier?

It is the third group that is particularly important from a medical perspective. In the modern obesity model, treatment success is determined not only by the percentage of weight lost, but also by improvements in complications, function, and quality of life. [32]

What is often misunderstood

"If the weight isn't going down, nothing's going on." Not necessarily. Strength training can improve fat loss and maintenance of lean mass without additional weight loss. [33]

"If your waistline gets smaller, you don't need any more weight." No. Body weight and waistline provide different information and work better together. [34]

"The body fat percentage on a smart scale is more accurate than a regular weight." Quite the opposite: the scale directly measures body weight, but calculates body composition. Individual bioimpedance error can be significant. [35]

"The more data I collect, the more effective my weight loss." Not proven. Self-monitoring is useful when it's linked to a clear goal and feedback, rather than simply generating a stream of numbers. [36]

"Weight loss success is determined solely by the percentage of weight lost." Current guidelines also evaluate central adiposity, comorbidities, functional status, mental well-being, and quality of life. [37]

A special situation after 60-65 years

As we age, maintaining muscle mass and function becomes even more important.

The European Association for the Study of Obesity's position for older adults recommends focusing on muscle mass, functional capacity, and quality of life, rather than pursuing weight loss at any cost. This is associated with the risk of sarcopenia, malnutrition, and loss of independence. [38]

Therefore, in an elderly person, weight loss with a simultaneous decrease in strength and walking speed cannot automatically be considered an ideal result.

In this group, it is especially useful to track functional parameters along with weight and waist size.

If weight loss is done with the help of medications

When treating obesity with modern drugs, the logic of monitoring remains the same, but medical supervision becomes more important.

Not only the magnitude of weight loss is assessed, but also the effectiveness of treatment in relation to obesity-related diseases, drug tolerability, nutrition, physical function and the possibility of long-term continuation of therapy. [39]

Adequate nutrition and maintaining functional muscle tissue are especially important, as rapid weight loss can be accompanied by a loss of some lean mass.

In such a situation, home scales alone are clearly not enough to assess the quality of weight loss.

Key points from experts

Luca Busetto is a professor at the University of Padua, a specialist in internal medicine, nutrition, and obesity treatment, and Vice President of the European Association for the Study of Obesity for the Southern Region. In EASO educational materials, he clearly emphasizes that obesity is not just about weight and body size, and the goal of treatment is not simply weight loss, but rather improving well-being, function, and health risks. [40]

Gijs Goossens is Professor of Cardiometabolic Physiology and Obesity at Maastricht University Medical Centre+. His research focuses on adipose tissue dysfunction and the metabolic complications of obesity. In his commentary on the new EASO model, he emphasizes the importance of abdominal fat and the need to consider the medical, functional, and psychological consequences of obesity, rather than relying solely on body mass index. [41]

Grant Tinsley, PhD, FACSM, FISSN, is a professor of human performance at Texas Tech University and director of the Energy Balance and Body Composition Lab. His work focuses on validating methods for assessing fat and lean mass. In a public discussion of home analyzer research, he recommends relying primarily on body weight and circumference and emphasizes that even well-functioning home body composition devices have significant individual error in assessing changes. [42]

Frequently Asked Questions

What is the best thing to measure besides weight?

Waist circumference is easy to measure at home and provides additional information about central fat accumulation and associated metabolic risk. [43]

What's more important - waist size or body fat percentage?

For routine home monitoring, waist measurement is generally more reliable and clinically useful. Home fat percentage is calculated using bioimpedance and can vary significantly from person to person. [44]

Can fat go away if the weight is stable?

Yes, this is possible, especially with a combination of an energy deficit and strength training. However, this cannot be confirmed by a single household indicator of body fat percentage. It is better to simultaneously assess waist size, long-term mass, strength, and, if necessary, a more precise body composition. [45]

Do I need to measure my hips, chest, arms and legs?

It may be useful if it helps monitor changes in body shape, but for medical assessment of central fat, waist circumference has significantly more evidential value.

Do you need to measure your waist every day?

No need. Small daily differences often reflect measurement error and changes in abdominal fullness rather than actual fat loss.

What to do if weight decreases and strength declines?

This is a reason to reconsider the program, especially if the loss of strength is significant and continues. During dietary weight loss, strength training helps reduce the loss of lean mass. [46]

Is it useful to track steps?

Yes. It's a simple indicator of daily activity. But it doesn't replace training intensity and strength training.

Should you track your sleep?

If sleep problems interfere with nutrition, activity, or well-being, yes. Current standards of obesity treatment include sleep assessment as part of a comprehensive behavioral assessment. [47]

What tests should I monitor when losing weight?

There is no one-size-fits-all approach. Depending on the risk factors, glycated hemoglobin, lipids, liver function tests, and other parameters may be monitored. The decision depends on the patient's underlying health and treatment. [48]

Can an improvement in blood pressure be considered a success if the weight loss is small?

Yes. Reducing cardiovascular risk is a medical goal in itself. In people with high blood pressure, improvement in risk is a clinically significant treatment outcome. [49]

Do you need to take photos when losing weight?

It's okay if it helps you see long-term changes, but photographs are no substitute for objective measurements. Use the same pose, distance, and lighting if you want to compare them.

What to do if the numbers start to sound alarming?

Reduce the number of metrics. Tracking should help you make decisions, not turn every fluctuation in weight or body fat percentage into a measure of success or failure.

Main

When losing weight, it's especially important to monitor waist circumference, in addition to weight. This is a simple indicator of changes in central obesity, which modern guidelines use along with body mass index to assess risk. [50]

The second level is that weight is not able to show at all whether strength is being maintained, whether physical performance is increasing, whether the diet and activity plan is being followed, or whether well-being is improving.

The percentage of body fat on a home scale can be left as an additional indicator, but it is much less accurate than it appears from the decimal numbers on the screen. [51]

If a person has hypertension, prediabetes, diabetes, lipid disorders, or other obesity-related conditions, the true outcome of treatment also includes blood pressure, glycemia, lipids, function, and quality of life. Modern obesity medicine increasingly views success in this way: not just "how many kilograms lost," but what happened to a person's health. [52]