010-111 · Question #232
Which occurs when running up an incline?
The correct answer is A. A greater range of motion occurs in the ankle joint. Running uphill requires increased ankle dorsiflexion to maintain contact with the angled surface, resulting in a greater total range of motion at the ankle joint compared to level running.
Question
Which occurs when running up an incline?
Options
- AA greater range of motion occurs in the ankle joint.
- BA reduced range of motion occurs in the ankle joint.
- CReduced force of action of the knee extensors.
- DGreater viscosity of the knee joint synovial fluid.
How the community answered
(21 responses)- A86% (18)
- C10% (2)
- D5% (1)
Why each option
Running uphill requires increased ankle dorsiflexion to maintain contact with the angled surface, resulting in a greater total range of motion at the ankle joint compared to level running.
When running on an incline, the foot must dorsiflex more during the stance phase to adapt to the upward slope and maintain an effective push-off position. This elevated demand for dorsiflexion expands the total range of motion used at the ankle joint beyond what is required on flat ground.
Ankle range of motion increases - not decreases - during incline running because greater dorsiflexion is required to accommodate the positive slope of the surface.
The knee extensors (quadriceps) must produce greater force when running uphill to overcome the increased gravitational load component; their demand is elevated, not reduced.
Synovial fluid viscosity is primarily influenced by joint temperature, not running surface incline; uphill running does not meaningfully alter the mechanical properties of synovial fluid.
Concept tested: Ankle joint biomechanics and range of motion during incline running
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