Final answer:
The Quadriceps femoris group is the primary muscle group responsible for pedaling a bicycle, helping to move the lower leg and raise the knee.
Step-by-step explanation:
When cycling, the muscle group primarily responsible for isolating the lower body during pedaling is the Quadriceps femoris group. These muscles are part of the anterior compartment of the thigh and are crucial for moving the lower leg out in front of the body, as when kicking, and assisting in raising the knee. In contrast, other muscle groups in the leg have different functions, such as the Hamstrings involved in moving the back of the lower legs and the Gluteal muscles that are responsible for attaching the leg to the pelvic girdle and producing extension of the hip joint. Specifically, the Gluteus Maximus is the largest of the gluteal muscles and plays a role in extension of the hip joint. However, for the specific action of pedaling, the quadriceps are the key muscles in play.
The quadriceps muscle group is primarily responsible for isolating the lower body during pedaling.
When cycling, the quadriceps, which are located on the front of the thigh, contract to extend the leg and push the pedal down, generating the power needed to cycle.
Examples of exercises that strengthen the quadriceps include squats, lunges, and leg extensions.
the correct option is A) Quadriceps