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Halo Sport 2 did not make Kieran Alger a darts pro, and his six-week test does not show that the headset caused his scores to improve. His reported practice averages were nearly the same with and without priming, while his highest single 100-dart score came without it. A later controlled study found a short-term learning effect from anodal tDCS in one dart-throwing session, but that does not establish that Halo Sport 2 produces lasting improvement.
What the experiment tested
In a 2019 Wareable article, Kieran Alger described using Halo Sport 2 while practicing darts. He aimed at treble 20, recorded scores using a Unicorn Smartboard and smartphone app, and threw more than 6,500 darts over six weeks. The protocol was developed with advice from Halo, but Alger explicitly cautioned that it was “not a truly rigorous scientific test.”
This was a personal experiment, not a randomized or blinded trial. Practice and time could improve scores on their own, and the design could not separate any device effect from repetition, fatigue, expectation, or changes in technique.
What the scores show
Alger reported benchmark totals after training blocks with and without priming. The figures show that scores varied over time, but they do not establish that priming was responsible for the changes.
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| Benchmark | Reported total points |
|---|---|
| Before training | 1,156 |
| After first unprimed block | 1,031 |
| After first primed block | 1,106 |
| After second unprimed block | 1,392 |
| After second primed block | 1,356 |
The article’s table gives an inconsistent per-dart average for the final benchmark: it lists 1,356 points and 12.56 per dart, although 1,356 divided by 100 is 13.56. The total is reported here; that per-dart figure should not be treated as verified.
For the practice blocks, Alger reported averages of 12.37 points per dart unprimed and 12.43 primed in the first block, then 13.34 unprimed and 13.39 primed in the second. Calculated from those reported averages, each primed/unprimed difference is under 0.5%. The highest single 100-dart practice score was 1,589, recorded without priming. Alger also reported close to 25% more treble 20s while primed, while noting that total score can be affected by darts landing in other high-scoring segments. These are results from one uncontrolled personal test, not population statistics.
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What Halo Sport 2 did
The 2019 article described Halo Sport 2 as a headset that used tDCS neuropriming before or during training. It used a dampened primer pad with 56 nodules, a smartphone app, and a 20-minute session. Those are the article’s device details, not independent proof that the product improved performance.
Halo’s April 2019 owner’s guide says stimulation starts after good contact and that tingling on the scalp is normal. It instructs users to begin training after the 20-minute session and says benefits apply during the following 60 minutes. The guide emphasizes focused, repetitive movement and proper form. These are manufacturer instructions and claims, not an independent demonstration of efficacy. Halo’s guide says: “Halo Sport 2 training results are best when the training period is paired with focused, repetitive movements for the specific skill you are trying to improve.”
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How the findings compare with a controlled study
A 2021 randomized study involving 58 young adults compared anodal tDCS, cathodal tDCS, and sham stimulation during a single dart-throwing practice session. The study authors reported that anodal stimulation accelerated online learning relative to the other conditions. That result is relevant context, but it does not prove lasting improvement, professional-level performance, or an effect from Halo Sport 2 in Alger’s six-week test.
| Evidence | Design and duration | What it can support |
|---|---|---|
| Alger’s 2019 test | One person; six weeks of practice; no randomized, blinded comparison | A description of one person’s scores and experience, not a causal claim about the headset |
| 2021 dart-throwing study | 58 randomized young adults; one practice session with anodal, cathodal, or sham tDCS | A reported short-term online-learning effect for anodal tDCS in that study, not long-term or Halo-specific efficacy |
Is Halo Sport 2 still available?
Halo Neuroscience now describes the Halo Sport as discontinued. Its current help page says the product was designed for athletes and used tDCS targeting the motor cortex, with the goal of enhancing performance through motor learning and muscle memory. The page does not confirm that the older headset, app, or support remain available to new users, so Halo Sport 2 should not be presented as a current product recommendation.
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What darts players should take away
- The six-week test involved one person and was not a rigorous controlled trial.
- Practice averages were nearly identical between primed and unprimed blocks; the highest single 100-dart score came without priming.
- The 2021 study offers limited, single-session evidence about anodal tDCS and dart-throwing learning, not proof of lasting benefits or Halo Sport 2’s effectiveness.
- Halo Sport is described by its manufacturer as discontinued, so the article is best read as a historical product test rather than a buying guide.
FAQ
Did Halo Sport 2 make the author better at darts?
The author’s scores changed over six weeks, but the test cannot establish that Halo caused the improvement. Reported primed and unprimed practice averages were nearly identical, and the top single 100-dart score came without priming.
How many darts did the author throw?
Alger reported throwing more than 6,500 darts over six weeks in his 2019 Wareable experiment.
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Does research support tDCS for dart throwing?
A 2021 randomized study of 58 young adults reported faster online learning with anodal tDCS during a single practice session. It does not establish lasting gains or demonstrate that Halo Sport 2 produces the same effect.
Can I buy Halo Sport 2 now?
Halo Neuroscience describes the Halo Sport as discontinued. Its current help page does not confirm availability of the older headset, app, or support for new users.
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