RCTJadad 2/5RandomizedDouble-BlindPlacebo-Controlled

Creatine Before Game Day: A New Trial Shows It Sharpens Basketball Skills When the Brain Is Also Working Overtime

Journal of the International Society of Sports NutritionAugust 4, 2025Vol. 22 (Suppl 1)

Summary

If you've ever watched a young athlete's technique fall apart the moment they have to think and move at the same time — reading a defense while dribbling, or calculating a play while passing — you've seen "cognitive-motor dual-task" (CMDT) breakdown in action. A new randomized, double-blind, placebo-controlled crossover trial published in the Journal of the International Society of Sports Nutrition (Aug 2025) asked a targeted question: can a short creatine-loading protocol help adolescent basketball players hold onto their skills when their brains are taxed by a simultaneous mental task, not just when they're moving alone?

Researchers recruited 40 male provincial-level basketball players aged 13–14 and had each one complete two testing blocks — one after 6 days of creatine monohydrate (0.3 g/kg/day for 5 days, split into 4 doses, plus a 0.1 g/kg top-up before testing) and one after a matched glucose placebo — separated by a 4-week washout to clear the creatine from the previous phase. The order was randomized and counterbalanced (Latin square design) so learning effects wouldn't skew results, and both players and testers were blinded to which powder was creatine. Athletes performed standardized dribbling, passing, and shooting drills twice: once alone (single-task, ST) and once while simultaneously doing rapid-fire mental subtraction (CMDT) — mimicking the mental load of reading a defense mid-possession.

The headline result: creatine helped in both conditions, but the benefit was substantially bigger under dual-task pressure. Dribbling was faster with creatine in both ST (p=0.023) and CMDT (p<0.001) conditions, with a much larger performance gap emerging under cognitive load. Passing showed no significant benefit under single-task conditions (p=0.059) but a clear improvement under CMDT (p<0.001) — meaning creatine essentially "rescued" passing accuracy specifically when the brain was busy. Shooting accuracy improved with creatine overall (p=0.001), though the size of that benefit didn't differ much between ST and CMDT. Creatine also lowered heart rate and perceived exertion (RPE) across every drill and both conditions, suggesting the players' bodies were working less hard for the same or better output. One curious footnote: creatine only improved the players' mental-math accuracy during the shooting task, not dribbling or passing — hinting that its cognitive boost may be condition-specific rather than a blanket sharpening effect.

This adds to a growing body of evidence — including newer trials on creatine and cognitive performance (BMC Medicine, 2023) and reviews on creatine's role in brain energy metabolism — suggesting creatine's benefits extend beyond raw strength and sprinting into the "thinking under pressure" domain that decides real games.

What This Means For You

For competitive youth or adult athletes in fast-decision sports (basketball, soccer, hockey), this trial suggests a short creatine-loading protocol timed before a tournament or big game — not just daily maintenance dosing — may pay off specifically when skills must be executed under mental pressure (reading plays, communicating, tracking the scoreboard), which is arguably when it matters most. The protocol used here (0.3 g/kg/day split into 4 doses for 5 days, then a smaller top-up dose ~30 minutes pre-competition) mirrors standard "loading phase" creatine protocols long used in strength sports, just applied to a skill-based team sport. For a 70 kg athlete, that's roughly 21g/day split into ~5g doses.

What to look for when buying: creatine monohydrate is the most extensively studied and cheapest form — there's no good evidence that "buffered," micronized, or other premium forms outperform it, so don't pay a premium for marketing claims. Choose products third-party tested (e.g., NSF Certified for Sport, Informed-Sport) especially for competitive or drug-tested athletes, since supplement contamination is a real risk in unregulated products.

Who benefits most: athletes in sports combining technical skill execution with simultaneous decision-making — basketball, soccer, and similar invasion sports — may see the clearest edge, based on this trial's dual-task findings. The reduced perceived exertion and heart rate findings also suggest creatine could help athletes conserve energy across a long tournament day or back-to-back games.

Who should be cautious: this trial only tested boys aged 13–14; parents and coaches of younger or female athletes should discuss creatine use with a sports dietitian or physician first, since safety and dosing data in youth populations remains comparatively limited despite creatine's strong overall safety record in adults.

Important Considerations

This was a small, single-sex trial (40 male players, ages 13–14, all provincial-level competitors from China) — results may not generalize to female athletes, recreational players, younger children, or older adults. The "acute" protocol tested (6 days total) is a short loading phase, not a maintenance regimen; the study didn't assess what happens with weeks or months of continued use, so we don't know if benefits persist, grow, or plateau over a season.

The dosing (0.3 g/kg/day, roughly 15–25g for a typical teen athlete) is higher than the standard 3–5g/day maintenance dose found on most commercial labels — consumers should not assume a standard scoop size replicates this protocol. The CMDT "dual-task" used a simple mental-subtraction task as a stand-in for real game cognitive load; actual basketball decision-making (reading defenses, teammates, live tactics) is more complex and less controlled, so real-game transfer isn't proven, only plausible.

The study had a modest Jadad quality score (2 of 5) — mainly because the specific randomization method and dropout reporting weren't fully detailed in the paper, even though blinding was well-executed and verified. No EEG, fMRI, or direct measures of brain energy metabolism were used, so the proposed cognitive/ATP-regeneration mechanism remains a hypothesis, not a confirmed explanation. One participant reported mild bloating (resolved without issue) — a reminder that individual GI tolerance to creatine loading varies. As with any supplement decision for a minor or competitive athlete, check with a physician or sports dietitian, especially regarding appropriate dosing, hydration, and any pre-existing kidney or cardiovascular conditions.

Terms Explained

Creatine monohydrateThe most researched, most cost-effective form of creatine supplement, used to boost muscle and brain energy (ATP) reserves.

Cognitive-motor dual-task (CMDT)Performing a physical skill (like dribbling) while simultaneously handling a mental task (like tracking a defense) — mimicking real game pressure.

Loading phaseA short period of higher-dose creatine intake (here, 0.3 g/kg/day for 5 days) used to rapidly saturate muscle and brain creatine stores before a lower maintenance dose or event.

ATP resynthesisThe process of regenerating the body's primary energy currency (ATP); creatine speeds this up via the phosphocreatine system, fueling short bursts of effort.

Rating of Perceived Exertion (RPE)A self-reported scale of how hard an activity feels, used alongside heart rate to gauge how much physical/mental strain a task is causing.

Crossover trialA study design where every participant receives both the treatment and the placebo (in random order, with a break between), letting each person serve as their own control.

Washout periodA gap between treatment phases (4 weeks here) long enough for a supplement's effects to fully clear before testing the next condition.

Dual-task costThe performance drop-off measured when a skill is done simultaneously with a mental task, compared to doing that skill alone.

Double-blind, placebo-controlledNeither participants nor researchers knew who received creatine vs. an inactive glucose placebo, reducing bias in reported results.

Technical Study Details

Study Design

RegistrationChinese Clinical Trial Registry (ChiCTR): ChiCTR2400085668

Total Score

JADAD Quality Assessment

/ 5

評価詳細

Randomization

0 / 2

Is the study described as randomized?

Yes+1

Rationale: The article explicitly and repeatedly describes the study as "randomized" (e.g., "randomized counterbalanced crossover design") and states participants were "randomly assigned" to sequences, satisfying the criterion for Q1.

Is the method of randomization described and appropriate?

No-1

Rationale: The article states that participants were "randomly assigned" to sequences and describes a "Latin square arrangement," but this Latin square is used only to counterbalance the order/sequence of ST vs. CMDT test conditions and supplementation phases—not to describe the actual mechanism by which participants were randomly allocated to groups. No specific randomization method (e.g., computer-generated random number sequence, random number table, coin toss) is described anywhere in the Methods or Testing procedure sections. Since the method of randomization itself is not specified, this criterion should be answered "no" per the Jadad scale guidelines, which require the actual randomization technique to be described and appropriate.</rationale> </invoke>

Blinding

2 / 2

Is the study described as double-blind?

Yes+1

Rationale: The article explicitly uses the term \"double-blind\" multiple times in the Testing procedure section, describing the study design as double-blind and detailing measures taken to preserve blinding (identical placebo dosing, allocation concealment from participants and assessors, and confirmation that blinding was successful).

Is the method of blinding described and appropriate?

Yes+1

Rationale: The article describes a double-blind design in which the placebo group received an identical dosage of glucose (an inert, indistinguishable substance commonly used as a creatine placebo since creatine monohydrate is typically odorless and tasteless when dissolved), with both participants and assessors kept unaware of group allocation throughout supplementation and testing. The authors also report a check on blinding success (no participant or assessor could identify their allocation), supporting that the blinding method was appropriately implemented and effective.

Dropouts/Withdrawals

0 / 1

Is there a description of dropouts and withdrawals?

No0

Rationale: The article does not provide any explicit statement about withdrawals or dropouts (i.e., how many participants withdrew or dropped out of each group and why). It reports the initial recruitment of 40 participants and later refers to "the 40 participants" in the results section, implying no losses, but this is never explicitly stated as a withdrawal/dropout count per group. The only related information is about a single adverse event (mild bloating) that did not lead to withdrawal from the study ("which resolved without intervention"), which is not equivalent to reporting withdrawals/dropouts. Since there is no explicit description of the number and reasons for withdrawals/dropouts for each treatment group, this criterion is not met.

Study Population

Sample Size40

Age Range13-14 years

ConditionAdolescent male basketball players (provincial-level competitors)

Inclusion Criteria

Aged 13-14 years
At least three years of basketball training experience
No major sports injuries or neurological disorders in the past year
Not currently taking dietary supplements known to affect sports performance

Interventions

Creatine monohydrate

Treatment

Dose0.3 g/kg/day (4 divided doses) for 5 consecutive days, plus additional 0.1 g/kg dose on day 6

Frequency4 equal doses per day for 5 days; single pretest dose 30 minutes before training on day 6

Duration6 days per phase

Routeoral

Placebo (glucose)

Control

DoseIdentical dosage schedule matched to creatine regimen

FrequencySame schedule as creatine regimen

Duration6 days per phase

Routeoral

Outcomes

Outcome	Type	Effect	p-value
Dribbling completion time	Primary	-	p = 0.023Significant
Passing accuracy score	Primary	-	p = 0.059
Shooting accuracy	Primary	-	p = 0.001Significant
Continuous Subtraction Task (CST) verbal response accuracy	Secondary	-	p = 0.013Significant
Dual-task cost on skill performance	Secondary	-	p < 0.05Significant
Rating of Perceived Exertion (RPE)	Secondary	-	p < 0.05Significant
Heart rate	Secondary	-	p < 0.05Significant

Safety

Adverse Events1

Serious AEs0

Dropout Rate0.0%

One participant in the creatine supplementation condition reported mild bloating, which resolved without intervention. No other side effects were observed in either group. No participants withdrew.

Conclusion

Acute creatine supplementation (0.3 g/kg/day for 5 days plus a 0.1 g/kg pretest dose) enhances technical performance (dribbling, passing, shooting) in adolescent basketball players, with more pronounced benefits under cognitive-motor dual-task (CMDT) conditions than single-task conditions. Creatine also reduced internal physiological and psychological load (heart rate and RPE) across all tasks and both conditions, and improved subtraction task accuracy only during shooting. These findings support acute creatine supplementation as a short-term nutritional strategy to optimize competitive performance under high cognitive-motor demand.

Limitations

Relatively small sample size limited to male adolescent basketball players aged 13-14, restricting generalizability
Only short-term (acute) effects of creatine supplementation were assessed; long-term supplementation effects were not studied
Although a Latin square design and familiarization session were used, residual learning/order effects cannot be entirely excluded
Underlying neurophysiological mechanisms (e.g., cognitive function, ATP regeneration) were not directly measured (e.g., no EEG or fMRI)
Individual variability in tolerability was observed (one participant reported mild gastrointestinal discomfort), suggesting need for closer adverse event monitoring in pediatric populations