Anthropometric and Neuromuscular Characteristics of Breakers Across Different Performance Levels: An Exploratory Cross-Sectional Field-Based Study.
Nils Freitag, Sophie Manuela Lindner, Antonia Neher and 3 others
Most standard field tests (vertical jump, grip strength, balance, agility) did not separate elite from recreational breakers.
Only trunk and ankle flexibility and drop-jump ground contact time showed significant group differences. Cross-sectional and exploratory, so these are associations, not proven performance drivers.
Key findings
1Of the full battery, only Jefferson Curl (trunk flexibility), Knee-to-Wall (ankle mobility), and DJ30 ground contact time (reactive strength) showed significant differences between performance levels. CMJ, IMTP, grip strength, core strength, medicine ball push, pull-ups, T-Agility, and all Y-Balance parameters did not differentiate elite, developmental, and recreational groups.
2Elite athletes were significantly older and had more breaking experience than both comparison groups. The authors note that some observed group differences may partly reflect age and accumulated training exposure rather than performance level alone.
3The full testing battery was completed in a single session of approximately 90 to 120 minutes using portable equipment across 5 decentralized training sites in Germany, with local coaches administering tests under the supervision of a qualified sport scientist.
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What it does not show
Cross-sectional design: no causal inference, no information about how performance changes over time or with training. Small elite subgroup (13 total, 7 female), and no a priori power analysis was conducted. The authors justify this by the fixed squad structure of the federation. Elite athletes were significantly older and had more training experience, so group differences may partly reflect age and accumulated practice rather than performance level per se. Analyses were unadjusted. Testing was spread across 5 sites with local coaches administering tests. No inter-rater reliability analysis was performed, so measurement variability cannot be fully excluded. The tests are general sport-motor assessments, not breaking-specific. The authors note that breakers improvise and rehearse novel movement patterns, which may limit the transferability of conventional strength and agility tests. Some tests (vertical jump, drop jump) have a technical component that breakers may not regularly practise, so performance may partly reflect movement familiarity rather than underlying capacity. No tests assessed reaction time, adaptation to breaking-specific situations, or overhead stability, and no competitive outcomes or judging decisions were included. Limited to the German breaking community; may not be representative of the international elite pool.
Declared interests
Some authors received consultancy compensation related to the development of the test battery and data analysis within the funded project. The study was funded by the Federal Institute of Sport Science (BISp), with additional support from the German Dancesport Federation and the Institute of Dance and Movement Culture at the German Sport University.
The easy way to misread this
Do not read the mobility and reactive-strength differences as proof that flexibility and fast stretch-shortening cycle performance cause higher breaking performance. The study is cross-sectional, and the elite group was significantly older and had more training experience, so the differences may partly reflect age and accumulated practice rather than a specific performance advantage. Equally, the tests that showed no difference (vertical jump, grip, balance, agility) may simply be the wrong tests for this sport rather than evidence that those qualities are unimportant.
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