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World 4 · Sprint and Ground Force · 10 min · PRO

Acceleration and top speed

Stride length, frequency and ground contact

PRO · Sports Science Lab

World 4: Sprint and Ground Force is part of PRO

The first world of Sports Science Lab is free. PRO opens the other 23 lessons in 6 worlds — simulations, quizzes and all.

  • The start: reaction and impulse
  • Leaning into the bend
  • Three kinds of drag in the pool
  • Streamline and the underwater phase
  • How a stroke pushes you forward
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

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← The start: reaction and impulseLeaning into the bend →

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