Plantarflexion

Muscles Involved

•  Calf
  • Gastrocnemius
  • soleus

Athlete Positioning

• Torso upright with low back locked in and core engaged
• Feet width
  • Jump stance

Coach Positioning 

• Kneeled beside athlete to ensure proper hinge position and effort produced

Set Up

• Secure gStrength device
  • Attach to platform
  • Attach to harness around torso
• Find squat angle (Coach uses a goniometer to ensure accuracy), with appropriate length of chain 

Prepare to Test

• Select device, select athlete (if athlete is not entered do it now), select test.
• Tare device to ensure proper reading

To Test 

• Athlete is in proper upright position, with no slack in chain
• Athlete will drive forefeet through platform, producing maximal force through ankle joints for 3-5 seconds
• Relax athlete after 3-5 seconds of maximal effort