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Questions and Answers
During which phase of running are the quadriceps active for a longer period of time compared to walking?
During which phase of running are the quadriceps active for a longer period of time compared to walking?
- Swing phase
- Stance phase
- Propulsion phase
- Absorption phase (correct)
What type of work do the quadriceps provide during running?
What type of work do the quadriceps provide during running?
- Positive work
- Negative work (correct)
- Both positive and negative work
- No work
What is the function of the rectus femoris during running?
What is the function of the rectus femoris during running?
- Controls hip extension
- Controls knee flexion (correct)
- Controls ankle dorsiflexion
- Controls plantar flexion
What is the role of the hamstrings during the propulsion phase of running?
What is the role of the hamstrings during the propulsion phase of running?
When does the first activity burst of the quadriceps occur during running?
When does the first activity burst of the quadriceps occur during running?
What is the function of the hamstrings during the absorption phase of running?
What is the function of the hamstrings during the absorption phase of running?
What is the most active phase for the quadriceps during running?
What is the most active phase for the quadriceps during running?
What is the function of the rectus femoris during running?
What is the function of the rectus femoris during running?
What is the role of the hamstrings during the center of mass movement in running?
What is the role of the hamstrings during the center of mass movement in running?
During which phase does the second activity burst of the quadriceps begin?
During which phase does the second activity burst of the quadriceps begin?
What is the function of the hamstrings during knee stabilization in running?
What is the function of the hamstrings during knee stabilization in running?
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Study Notes
- Quadriceps are active for longer during running than walking.
- Quadriceps function from the last 20% of swing phase until the end of absorption phase during running.
- Quadriceps provide more negative work than positive work during running.
- Rectus femoris controls body's center of mass and knee flexion during running.
- Hamstrings work as hip extensor during propulsion phase and assist quadriceps in knee stabilization during absorption phase.
- Hamstrings co-contract with quadriceps as the center of mass moves forward.
- Quadriceps peaks twice during running gait.
- First activity burst occurs eccentrically at the start of the absorption phase.
- Second activity burst begins at the end of propulsion after toe-off.
- Quadriceps is most active during the first half of stance.
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