NCSF Practice Exam 2023 with 100% correct answers

What term represents the transfer of energy across joints to support voluntary movement? kinetic chain Kinetic chain refers to the concept that energy transfers across joints to support voluntary actions. This is applicable during general movements such as running on a treadmill, where any energy that is not harnessed will be lost as heat and fail to contribute toward accomplishing the task. Successful energy transfer will result in a more stable and efficient environment, which is normally encouraged through closed-chain exercises. The posterior pelvic tilt seen in this picture, is commonly seen in bilateral leg exercises a result of tight ____________________. glutes The hip extensors, including the glutes and proximal insertion of the hamstrings, are often found to be inflexible. Part of the reason for this common occurrence is attributed to the increased propensity to sit for long hours with flexed knees and rounded back. Improper seated posture causes posterior pelvic migration and reduced hip extensor length. Ankle dorsi flexion is caused by _________________. a concentric contraction of the anterior tibialis A concentric contraction of the anterior tibialis would cause dorsi flexion of the ankle, as seen during the recovery phase of jogging. Weakness in the anterior tibialis has also been shown to increase the prevalence of shin splints among runners and falls among older adults. When performing biceps and triceps exercises, what joint action should occur at the shoulder? no joint movement No movement should occur in the glenohumeral joint during arm exercises. The most common "cheat" error is flexing the hips and extending the shoulders during triceps exercises, and extending the hips and flexing the shoulders during bicep exercises. What exercise is used to cause elevation of the shoulder complex (scapulae and humerus)? barbell shrug The trapezius musculature is comprised of three portions that serve distinct functions. The upper trapezius is responsible for shoulder elevation as seen during a shrug exercise, the middle trapezius aids in scapular rotation and the lower trapezius is primarily reserved for functions above 90 degrees of shoulder abduction. What is the natural curvature of the thoracic spine? kyphotic curve The thoracic spine naturally maintains a kyphotic curve. A kyphotic curvature rounds outward but should not be confused with the term kyphosis, which refers to an abnormally significant curvature commonly seen among the elderly.