Final answer:
The hip flexors, back extensors, and lats are groups of muscles involved in movements such as bending the hip, extending the spine, and moving the shoulder, and they are collectively known as core muscles.
Step-by-step explanation:
The hip flexors, back extensors, and lats (latissimus dorsi) are all groups of muscles that are involved in various movements of the body. Hip flexors are responsible for bending the hip joint and bringing the thigh towards the abdomen. Back extensors, like the erector spinae group, help in extending the vertebral column and maintaining the lumbar curve. This group includes the iliocostalis, longissimus, and spinalis muscles. The lats or latissimus dorsi are large, flat muscles on the back that help in movements such as adduction, extension, and medial rotation of the shoulder.
Given this information, the correct answer to the question "Hip flexors, back extensors, lats are:" would be:
- Core muscles