Question

Using the following pictures and the tables below them, how can I identify the agonist(s) at each joint? There are too many choices in my textbook can someone help me narrow it down2. Lifting Joint Agonist(s) Knee a. (group) Hip a. (group) Spine a. (group)

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Answer #1

Knee joint

During lifting weights, the agonist muscles the help in lifting are Hamstrings and antagonistic muscles are quadriceps. In contrast, during recovery phase the quadriceps contract to extend the knee and hamstrings lengthen to allow movement, hence in recovery phase quadriceps are agonists and hamstrings are antagonists.

QUAD HAMSTRING

Hip joint

Primary agonist muscles that help hip joint in lifting weights are

Quadriceps memories

Vastus intermedius Rectus femoris Vastus lateralis Vastus medialis

Adductor magnus

Pectineus Adductor longus Adductor brevis Adductor magnus Gracilis

Gluteus maximus

0123RF 0123RF 23RF 0123RF 123RF

Spine

Spine:

Rectus abdominis muscles are agonist muscles that help the spine in lifting weights

Rectus abdominis linea alba-4 linea alba Original by sv:Användare:Chrizz, 28 maj 2005

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