The Extensor Digitorum Longus (extension of the four lateral toes), and the Extensor Hallucis Longus (extension of the large toe).
The calf muscles
When standing on tiptoes, the tibialis anterior muscle is at full extension and is unable to "do" anything.
A muscle becomes shorter when it contracts.
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
When one muscle in a pair contracts the other expands.
plantar flexion
Flexion
Flexion
shortens
shortens
The muscle that contracts when the leg is extended at the knee is call the gastrocnemius muscle
When the bicep contracts the triceps relax
Relaxes