REF-803 · Hanon & Gajer, 2009 · Journal of Strength and Conditioning Research, Vol. · Paper · PubMed

Velocity and Stride Parameters of World-Class 400-Meter Athletes Compared With Less Experienced Runners

Blimited evidenceMeasured on trained to world-class athletesWritten before October 2026, being re-checked

Video analysis of 400 m competitions measured velocity and stride parameters in each 50-m segment for world-class, national and regional athletes of both sexes (6 groups of 5). All athletes reached peak velocity between the 50- and 100-m marks (mean 8.96 m/s for the 5 best women and 10.12 m/s for the 5 best men). Peak stride frequency came in the second and third 50-m segments.

The better athletes reached the 200-m mark at higher absolute and relative velocities, and their fatigue index was larger: 22.99% (world-class) against 14.43% (national) and 13.91% (regional). The authors conclude that world-class runners pace more aggressively and tolerate more fatigue.

Participants

3 performance levels (world-class, national, regional) × both sexes, each of the 6 groups comprising 5 subjects. Ages and personal bests are not given in the abstract.

Protocol

Video data from 400 m competitions.
Velocity, stride frequency and stride length computed for each 50-m segment.
Fatigue index calculated per performance level.

Key Results

Peak velocity was reached by all athletes between the 50- and 100-m marks: mean 8.96 m/s (5 best women) and 10.12 m/s (5 best men).
Peak stride frequency in the second and third 50-m segments: 3.99 ± 0.13 (world-class women) and 4.12 ± 0.19 (world-class men). Stride length 2.29 ± 0.04 (women) and 2.53 ± 0.08 (men). Units for frequency and length are not given in the abstract.
At the 200-m mark the better athletes ran at higher absolute and relative velocities: 97.6 ± 0.5% (world-class men) and 96.3 ± 0.7% (world-class women) of their best 200 m performance.
Fatigue index: 22.99% (world-class), 14.43% (national), 13.91% (regional).
Authors' reading: world-class runners adopt a more aggressive pacing strategy and show greater fatigue, which might indicate greater mental commitment and/or a better capacity to run under fatigue.

Practical Application

"Should I go out hard in a 400 m?" — in a video analysis of world-class, national and regional 400 m runners (6 groups of 5), every runner peaked between 50 and 100 m, but the world-class runners passed 200 m at 96.3-97.6% of their best 200 m speed and faded more (fatigue index 22.99% against 14.43% and 13.91%): the best 400 m runners race an aggressive first half and accept a larger fade.
Do not judge a 400 m by how much the runner slowed: a larger fade came with the faster, not the slower, performances in this sample.
Inference, not tested here: a lower-level runner may not be able to hold an elite-style first half; the paper compared levels, it did not test changing a runner's pacing. The field test with elite-style pacing is REF-771.
Not from this paper; the base's own practice: build the capacity to run under fatigue with special-endurance sessions on top of speed work (SYNTH-59), rather than asking a runner to copy the elite split before that capacity exists.

Limitations

Five runners per group; descriptive, no physiological measurements.
Competition video: wind, lane and race context are not controlled or reported in the abstract.
The fatigue index formula and units for stride frequency and length are not given in the abstract.
Written from the abstract and record metadata only (full text not read).
How this entry was checked and changed
Why this level

cross-sectional comparison, 6 groups of 5 (n=30)