This study explored the agreement between a single-run and a multiple-run method for force–velocity (Fv) profiling of sprinting athletes; we evaluated both absolute values and changes over time caused by sprint training.
Seventeen female handball players (23 ± 3 years, 177 ± 7 cm, 73 ± 6 kg) performed 30 m un-resisted and resisted sprints (50, 80 and 110 N resistance) before and after an 8-week sprint training intervention. Two approaches were used to calculate theoretical maximal velocity (v0), horizontal force (F0), power (Pmax), and the force–velocity slope (SFv): (1) the single-run method, based on inverse dynamics applied to the centre-of-mass movement, was calculated from anthropometric and sprint split time data; and (2) the multiple-run method, where peak velocity from un-resisted and resisted sprints were plotted against the horizontal resistances.
Trivial differences in v0 (0.7%) were observed between the two calculation methods. Corresponding differences for F0, Pmax and SFv were 16.4, 15.6 and 17.6%, respectively (most likely; very large effect size). F0 showed poor agreement between the methods (r = 0.26 and 0.16 before and after the intervention). No substantial correlation between the changes (from pre- to post-training tests) in SFV calculated with the single-run and the multiple-run methods were observed (r = 0.02).
This study revealed poor agreement between the Fv relationships of the investigated calculation methods. In practice, both methods may have a purpose, but the single-run and the multiple-run methods appear to measure somewhat different sprint properties and cannot be used interchangeably.
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Coefficient of variation
- F 0 :
Maximum theoretical horizontal force
- P max :
Maximum horizontal power
- S Fv :
Slope of the linear force–velocity relationship
- v 0 :
Theoretical maximal velocity
- ∆ :
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This manuscript has been read and approved by all the listed co-authors. The manuscript contains original material only that has not previously been published, and is not currently under consideration elsewhere, nor will be submitted elsewhere until a final decision has been made by the journal.
Communicated by Jean-René Lacour.
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Helland, C., Haugen, T., Rakovic, E. et al. Force–velocity profiling of sprinting athletes: single-run vs. multiple-run methods. Eur J Appl Physiol 119, 465–473 (2019). https://doi.org/10.1007/s00421-018-4045-2
- Sprint mechanical properties