RTBC Lower Extremities Practice Test 2026 - Free Lower Extremities Exam Questions and Study Guide

The hamstrings play a crucial role during running primarily by extending the hip and flexing the knee. This muscle group, located at the back of the thigh, consists of three main muscles: the biceps femoris, semitendinosus, and semimembranosus.

When running, the hamstrings contract to extend the hip when the leg moves backward during the push-off phase. This action is essential for generating the necessary force to propel the body forward. Additionally, as the leg swings back through, the hamstrings help flex the knee, allowing for an efficient gait cycle and preparing the leg for the next step.

This coordinated action not only contributes to speed and power in running but also aids in maintaining balance and stability. Therefore, the role of the hamstrings is integral to effective running biomechanics. Other options do not accurately reflect the primary functions of the hamstrings during running, as they involve either incorrect joint actions or different muscle groups.