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010-111 · Question #184

You determine that a client is over striding when they run. What would be the effect on their running performance due to this mechanical error?

The correct answer is D. Decrease in running economy and increase in braking motion. Overstriding causes the foot to land in front of the center of gravity, generating a braking force each stride that increases energy expenditure and reduces running economy.

Exercise Leadership and Client Education

Question

You determine that a client is over striding when they run. What would be the effect on their running performance due to this mechanical error?

Options

  • AIncrease in turnover rate and decrease in running economy.
  • BIncrease in energy cost and increase in running economy.
  • CDecrease in energy cost and decrease in braking motion.
  • DDecrease in running economy and increase in braking motion.

How the community answered

(32 responses)
  • A
    13% (4)
  • B
    3% (1)
  • C
    9% (3)
  • D
    75% (24)

Why each option

Overstriding causes the foot to land in front of the center of gravity, generating a braking force each stride that increases energy expenditure and reduces running economy.

AIncrease in turnover rate and decrease in running economy.

Overstriding decreases turnover rate rather than increasing it, because each excessively long stride requires more time in the air and at ground contact per cycle.

BIncrease in energy cost and increase in running economy.

While energy cost does increase with overstriding, running economy decreases rather than increases, because more energy is consumed per unit of forward displacement.

CDecrease in energy cost and decrease in braking motion.

Overstriding increases braking motion rather than decreasing it, and also increases energy cost, making both components of this choice the opposite of the actual biomechanical outcome.

DDecrease in running economy and increase in braking motion.Correct

When a runner overstrides, the foot contacts the ground well ahead of the center of mass, creating a ground reaction force with a horizontal braking component that decelerates forward momentum. This braking motion forces the runner to expend additional energy to re-accelerate with each stride cycle, directly degrading running economy. The combination of increased energy cost and pronounced braking impulse is the defining mechanical consequence of overstriding.

Concept tested: Effects of overstriding on running economy and braking mechanics

Source: https://www.nsca.com/education/articles/

Topics

#running mechanics#overstriding#running economy#braking force

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