Competitive Table Tennis Players Eat Half the Fiber and a Quarter of the Folate They Need: First Direct-Measurement Diet Study

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Table tennis players obsess over equipment. Rubber hardness, blade composition, ball brand. A new study from China suggests the obsession is pointed at the wrong piece of equipment: the plate.

Researchers at Hengyang Normal University put 42 trained competitive table tennis athletes, 24 men and 18 women aged 18 to 24, through the most complete nutritional assessment the sport has seen. Every player competed at the provincial level or higher, had at least five years of training, and logged a minimum of 10 hours per week on the table. Their diets were tracked using three non-consecutive 24-hour recalls, their nutrition knowledge was tested with a structured questionnaire, and their body composition and physical performance were measured directly (Frontiers in Nutrition, 2026).

What the Researchers Found

The headline numbers concern micronutrients, the vitamins and minerals that drive recovery, oxygen transport, and immune function. Against recommended intake levels, the average player fell short on nearly everything measured:

• Folate: 21% of recommended intake (84.4 micrograms vs 400 needed)
• Iron: 24-54% of recommended intake (4.3 mg vs 8-18 mg needed)
• Dietary fiber: 21-32% of recommended intake (8.0 g vs 25-38 g needed)
• Vitamin C: 27-32% of recommended intake (24.1 mg vs 75-90 mg needed)
• Calcium: 33-41% of recommended intake (331.5 mg vs 800-1,000 mg needed)
• Fruit and vegetables: 28% of recommended servings (1.4 vs at least 5 per day)

That is not a marginal miss. A player eating a quarter of the folate they need is a player whose red blood cell production, tissue repair, and recovery capacity run below spec every single week.

The surprises did not stop at shortfalls. Reported energy intake averaged just 1,838 calories per day, ranging from 243 to 2,722, a strikingly low figure for athletes training 10-plus hours a week in an intermittent high-intensity sport. The authors acknowledge some of this may reflect under-reporting, but note the pattern is also consistent with genuinely inadequate energy availability, which is linked to reduced training adaptation, chronic fatigue, and long-term health damage.

The macronutrient picture, by contrast, looked fine. Fat intake sat at 24.0% of energy (within the recommended 20-35% band), saturated fat at 7.9%, and free sugar at 5.0%, both under the 10% ceiling. On paper, these athletes eat a “balanced” diet. The problem is what the balance hides: enough protein, carbs, and fat, and almost none of the micronutrient density that comes from vegetables, fruit, and whole grains.

Knowing About Nutrition Did Not Help

Here the study delivers its most useful finding. Nutrition knowledge among the players scored exactly average, 50.0% on a validated scale, with the weakest scores in sports nutrition and supplement use. So the researchers split the group into high-knowledge and low-knowledge halves and compared them.

The result: no significant differences in standing long jump, reaction time, shuttle run, fat-free mass, muscle mass, or total body water. A principal component analysis showed the two knowledge groups overlapped almost completely. Knowing more about nutrition did not translate into eating better, building more muscle, or performing differently.

A parallel 2026 study of 100 male collegiate athletes, published in BMC Sports Science, Medicine and Rehabilitation, found exactly the same pattern. Elite athletes consumed significantly more energy, protein, and carbohydrates than amateurs (all p < 0.001) and ate more frequent meals, yet their sports nutrition knowledge scores were statistically identical (p = 0.57). In multiple regression, protein intake and competitive level predicted body composition; nutrition knowledge did not. What you eat beats what you know.

A Pattern Eight Years Old

None of this is new to the sport, which makes it worse. A Brazilian team warned about it in 2018 after assessing competitive table tennis players and finding poor dietary intake and low nutrition knowledge in adolescent and adult athletes alike (Nutricion Hospitalaria, 2018). Eight years later, a better-designed study with a better toolbelt found the same shortfalls at the same competitive level. The warning was published, and nothing changed.

What This Means for Players and Coaches

The practical conclusions write themselves:

Judge your diet by its weakest links, not its averages. A favorable macronutrient split means nothing if folate sits at 21% and calcium at a third of target. The cheapest fix is also the simplest: more vegetables and fruit, aiming for the five servings a day that the average player in this study missed by nearly three-quarters.

Do not confuse knowing with doing. The knowledge-performance gap found here and in the collegiate study means nutrition lectures alone will not change outcomes. Structure does: planned meals, regular protein intake, and food environments that make the right choice the easy one. The BMC study’s elite athletes ate better than the amateurs with identical knowledge, likely because their programs surrounded them with better habits.

Treat persistent fatigue as a fuel problem first. Average energy intake of 1,838 calories for athletes training 10-plus hours a week is a red flag whether it reflects under-eating or under-reporting. Either way, it points to a sport culture where fueling is an afterthought.

Get iron and calcium checked. Low iron directly impairs oxygen delivery and endurance; low calcium undermines bone density in a sport built on explosive footwork. A simple blood panel costs less than a sheet of premium rubber and tells you far more about your game.

The Bottom Line

This is a small study, 42 athletes at one competitive tier, and cross-sectional, so it shows associations rather than cause and effect. The authors are candid about those limits.

But the direction of the evidence is consistent across three studies, two countries, and eight years: competitive table tennis players under-fuel and under-nourish relative to their demands, and improving that is a behavior problem, not an education problem. For a sport where players happily debate blade compositions for hours, the data says the highest-leverage performance upgrade costs nothing at all: eat more plants, and eat enough.

Sources

1. Deng SJ, Yu J, Shu MY, Li G, et al. Associations of dietary intake and nutrition knowledge with body composition and performance in table tennis athletes: a cross-sectional study. Frontiers in Nutrition. 2026;13:1858347. PMID 42491224.
2. Mohamed O, Bakr M, Al Sayed M. Competitive level is associated with dietary practices but not sports nutrition knowledge in collegiate athletes. BMC Sports Science, Medicine and Rehabilitation. 2026. PMID 42625223.
3. Argôlo DBorges J, Cavalcante A, Silva G, et al. Poor dietary intake and low nutritional knowledge in adolescent and adult competitive athletes: a warning to table tennis players. Nutricion Hospitalaria. 2018;35(5):1124-1130. PMID 30307296.