ACL Injury Risk Study Quiz

What is the main hypothesis of the study described in the document?

• High shoe-surface friction leads to a decrease in ACL injury risk.

• Different movement strategies are used for shoe-surface conditions with different coefficients of friction (COF).

• Low shoe-surface friction is associated with increased biomechanical changes.

• Shoe-surface friction does not influence movement strategies.

What was the study design used in the research?

• Meta-analysis study.

• Randomized controlled trial.

• Controlled laboratory study.

• Longitudinal cohort study.

What was the main conclusion of the study regarding high COF shoe-surface conditions?

• They have no significant impact on ACL injury risk.

• They are associated with biomechanical conditions that can increase the risk of ACL injury.

• They lead to a lower external knee flexion angle.

• They result in a decreased medial distance of the center of mass from the support limb.

According to the document, what should be considered when analyzing the risk of ACL injury?

• The type of sport being played.

• The biomechanical movement changes that occur for a shoe-surface condition with high friction.

• The age and gender of the athlete.

• The brand of shoes worn during the activity.

What is the incidence of acute ACL disruptions per year in the United States, according to the document?

• Approximately 1 in 3000.

• Approximately 1 in 1000.

• Approximately 1 in 10,000.

• Approximately 1 in 300.

How many total participants volunteered for the study on shoe-surface friction during a sidestep cutting task?

• 11

• 22

• 23

• 36

What was the average age of the subjects in the study?

• 23.2 ± 1.9 years

• 26.3 ± 2.7 years

• 30.0 ± 3.0 years

• 36.6 ± 4.2 years

Which factor has been suggested as a risk factor for increased risk of ACL injury due to increased friction angle shown in the study?

• Decreased knee flexion angle

• Increased valgus angle of the knee

• Increased external knee moments of flexion

• Decreased valgus angle of the knee

What type of surface conditions did the study hypothesize to affect movement strategies for a shoe-surface condition at the foot contact during a sidestep cutting task?

• Only dry surfaces

• Only wet surfaces

• Both high and low coefficient of friction (COF) conditions

• Only icy surfaces

What was the COF of the high friction surface used in the study?

• 0.38

• 0.57

• 0.87

• 1.00