You Have an Athlete with a Limitation in Ankle Dorsiflexion

You have an athlete with a limitation in ankle dorsiflexion. Which of the following applications of US would you choose to treat this patient?

A) 3 MHz, continuous US at 1 watt/cm² for 3 to 4 minutes over an area of the Achilles tendon of 2 ERA while moving the ankle into dorsiflexion
B) 1 MHz, continuous US at 1.5 watts/cm² for 7 to 8 minutes over the gastrocnemius muscle belly while moving the ankle into dorsiflexion
C) 1 MHz, continuous US at 1 watt/cm² for 3 to 4 minutes over an area of the Achilles tendon of 2 ERA while moving the ankle into dorsiflexion
D) 3 MHz, continuous US at 1 watt/cm² for 3 to 4 minutes over an area of the Achilles tendon of 2 ERA 3 to 5 minutes prior to doing dorsiflexion stretching