Sports dietitians use many different methods to check if athletes aren’t eating enough calories, according to a 2026 survey of 89 professionals. While nearly all dietitians (100%) assess food intake and 98.9% calculate exercise energy use, only 66% evaluate overall energy balance and 41.6% assess energy availability—the calories left after exercise. Gram Research analysis shows that more experienced dietitians with 7+ years in the field are significantly more likely to use comprehensive assessments, suggesting standardized protocols could improve athlete health screening.
Sports nutrition experts use many different methods to figure out if athletes aren’t getting enough calories to fuel their bodies and stay healthy. A new survey of 89 sports dietitians found that while most check energy intake and exercise levels, they don’t all use the same approach. Some use food logs and activity trackers, while others measure body composition or check for signs of disordered eating. The study shows that experienced dietitians and those working in different settings tend to use different assessment methods, highlighting the need for more standardized approaches in this important area of athlete health.
Key Statistics
A 2026 cross-sectional survey of 89 sports dietitians found that 100% assessed energy intake and 98.9% calculated exercise energy expenditure, but only 66% evaluated overall energy balance and 41.6% assessed energy availability among free-living athletes.
According to research reviewed by Gram, dietitians with 7 or more years of experience were significantly more likely to assess energy availability compared to less experienced practitioners (p = 0.005), suggesting experience improves assessment comprehensiveness.
The 2026 survey of 89 sports nutrition professionals found that diet history interviews (48.3%) and food logs (30.3%) were the most common methods for measuring athlete energy intake, while activity factor estimates (49.4%) and exercise logs (29.2%) were most frequently used to calculate energy expenditure.
Among 89 sports dietitians surveyed in 2026, only 31.5% evaluated both energy balance and energy availability together, despite research showing both metrics are important for identifying energy deficiency in athletes.
The Quick Take
- What they studied: How sports nutrition experts assess whether athletes are eating enough calories to support their training and maintain good health
- Who participated: 89 sports dietitians (registered nutrition specialists who work with athletes) from various practice settings completed a survey about their assessment methods
- Key finding: All surveyed dietitians checked energy intake and nearly all (98.9%) assessed exercise energy expenditure, but only 66% evaluated overall energy balance and 41.6% assessed energy availability—the amount of calories left after exercise
- What it means for you: If you’re an athlete working with a sports dietitian, they’re likely checking your calorie intake and exercise levels, but the specific methods and thoroughness may vary depending on their experience and where they work. Consider asking your dietitian which assessment methods they use.
The Research Details
Researchers sent a 39-question survey to sports dietitians asking about their methods for checking if athletes have enough energy (calories). The survey covered five main areas: how they measure food intake, how they calculate exercise energy use, how they measure body size and composition, how they check for unhealthy eating patterns, and what blood tests or clinical checks they perform.
Eighty-nine dietitians completed the full survey. The researchers then compared answers based on where the dietitians worked (hospitals, private practice, sports teams, etc.) and how long they’d been working in sports nutrition (less than 7 years versus 7 or more years). They used statistical tests to see if certain groups used different methods.
This approach allowed researchers to create a snapshot of current practice in the field and identify variations in how professionals approach the same problem.
Understanding how sports dietitians currently assess energy deficiency is important because not eating enough calories can seriously harm athletes’ health—affecting bone strength, reproductive function, immune system, and athletic performance. If there’s no standard way to check for this problem, some athletes might not get identified and treated. This research helps identify gaps and inconsistencies that could be improved.
This study surveyed real-world practitioners, which gives insight into actual practice. However, the sample size of 89 dietitians is relatively modest, and we don’t know if these dietitians represent all sports dietitians nationwide. The study relied on self-reported methods rather than observing actual practice, so responses might not perfectly reflect what dietitians actually do. The study is descriptive rather than testing whether certain methods work better than others.
What the Results Show
Nearly all surveyed sports dietitians (100%) assessed how much food athletes eat, and 98.9% calculated how many calories athletes burn during exercise. About 93% checked for signs of disordered eating patterns, and 84% tracked body weight. These four assessments were the most common across all dietitians.
However, more specialized assessments were less common. Only 66% of dietitians calculated overall energy balance (total calories in versus total calories out), and just 41.6% assessed energy availability (calories remaining after accounting for exercise). Even fewer—only 31.5%—evaluated both energy balance and energy availability together.
For measuring food intake, dietitians most often used diet history interviews (48.3%) or asked athletes to keep food logs (30.3%). For calculating exercise energy use, they typically used activity factor estimates based on general guidelines (49.4%) or reviewed exercise logs (29.2%). When measuring body composition, the most common methods were bioelectrical impedance analysis (15.7%) and air displacement plethysmography (14.6%)—both specialized techniques that measure fat versus muscle.
The study found important differences based on experience level. Dietitians with 7 or more years of experience were significantly more likely to assess energy availability compared to less experienced dietitians (p = 0.005). This suggests that as dietitians gain experience, they adopt more comprehensive assessment methods. The study also noted that assessment methods varied by practice setting, though specific differences weren’t fully detailed in the abstract.
This is one of the first studies to systematically examine how sports dietitians in real-world settings assess energy deficiency. Previous research has focused on the health effects of low energy availability in athletes, but little was known about the actual assessment methods professionals use. This study fills that gap by showing that current practice is inconsistent and varies widely.
The study surveyed only 89 dietitians, which may not represent all sports dietitians in the United States or worldwide. We don’t know the response rate or if non-responders used different methods. The survey asked what methods dietitians use, but didn’t verify whether they actually use these methods correctly or consistently. The study is descriptive and doesn’t test whether certain assessment methods are more effective at identifying energy deficiency. Finally, the study doesn’t include information about whether different assessment approaches lead to better health outcomes for athletes.
The Bottom Line
If you’re an athlete, ask your sports dietitian which specific methods they use to assess your energy status—including whether they measure energy availability, not just total calorie intake. According to Gram Research analysis, more experienced dietitians are more likely to use comprehensive assessments. Consider working with a dietitian who has at least 7 years of experience in sports nutrition and uses multiple assessment methods. Confidence level: Moderate (based on observational data showing experienced practitioners use more thorough methods).
This matters most for competitive athletes, especially those in sports emphasizing leanness (distance running, gymnastics, figure skating, wrestling) or those training intensively. It’s also relevant for coaches, athletic trainers, and anyone supporting athlete health. The findings are less directly applicable to recreational exercisers, though the principles still apply.
Assessment of energy deficiency is ongoing—it’s not something that shows results in days or weeks. Most dietitians will want to track your food intake and activity for at least 2-4 weeks to get an accurate picture. Changes in energy availability and health markers may take 4-12 weeks to become apparent, depending on the severity of the deficiency.
Frequently Asked Questions
How do sports dietitians check if an athlete isn’t eating enough?
Sports dietitians typically review food intake through diet history interviews or food logs, calculate exercise energy use from activity logs, track body weight, and check for signs of disordered eating. However, methods vary widely—only 66% assess overall energy balance and 41.6% measure energy availability, the calories remaining after exercise.
What’s the difference between energy balance and energy availability?
Energy balance is total calories in versus total calories out. Energy availability is more specific—it’s the calories left over after subtracting exercise energy use from food intake. Energy availability better predicts health problems in athletes because it shows what energy remains for body functions like bone building and reproduction.
Do all sports dietitians use the same methods to assess energy deficiency?
No. A 2026 survey of 89 sports dietitians found assessment methods varied widely and differed by experience level and practice setting. More experienced dietitians (7+ years) were significantly more likely to use comprehensive assessments including energy availability measurements.
Why is checking energy availability important for athletes?
Low energy availability can damage bone health, reproductive function, immune system, and athletic performance. According to research reviewed by Gram, assessing energy availability—not just total calories—helps identify athletes at risk for these serious health problems before they develop complications.
What should I ask my sports dietitian about their assessment methods?
Ask whether they measure energy availability (not just total calories), how long they track your intake, whether they use food logs or interviews, and if they assess for disordered eating patterns. Consider working with a dietitian who has 7+ years of experience, as they’re more likely to use comprehensive assessment methods.
Want to Apply This Research?
- Log daily food intake and exercise duration/intensity for at least 2 weeks. Track metrics like: total calories consumed, protein intake, body weight trends, energy levels during workouts, and any signs of fatigue or mood changes. This data helps your dietitian calculate your energy balance and availability.
- Use the app to set a daily calorie target based on your dietitian’s recommendation and log meals before eating them (not after) to increase awareness. Set reminders to eat adequate snacks between meals if you’re in a high-training phase. Track how you feel during workouts to correlate with your energy intake.
- Weekly review: Compare your average daily calories to your target and note any patterns in energy levels or performance. Monthly review: Track body weight trends, strength changes, and recovery quality. Quarterly: Share your app data with your sports dietitian to adjust recommendations based on actual intake patterns and performance outcomes.
This research describes current assessment practices among sports dietitians but does not provide medical advice. If you believe you may have low energy availability or are experiencing symptoms like fatigue, irregular periods, frequent injuries, or mood changes, consult with a qualified sports dietitian or physician. This information is for educational purposes and should not replace professional medical evaluation or treatment. Individual assessment and recommendations should be personalized based on your specific situation, sport, training level, and health status.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.