The Lunge Matrix is a great way to get your run legs prepped and also create resiliency. 

Complete:

• 10x Alternating forward lunges (5 each leg)
• 10x Alternating forward lunges with upper body rotation i.e. right leg fwd, upper body rotates to right, left arm over right leg (5 each leg)
• 10x Alternating reverse lunge (5 each leg)
• 10x Alternating side lunges (5 each leg)
• 10x Leg swings (forward and back)
• 10x Sideways leg swings