Power walking: Keep arms and legs straight and picture yourself cross-country skiing. Your arms touch the surface on the swing.
Hurdles: “Run” over hurdles alternating the lead leg. Reach forward with each arm as if you were trying to touch your lead foot. This exercise is great for increasing range of motion in the hip flexors and hamstrings.
Uphill: Exaggerate the back swing of the elbows as you use your upper body to add power. Lift knees slightly more than in a regular run, and visualize running up a hill.
Downhill: Narrow your stride, lean forward slightly and increase your cadence. It should resemble vertical kicking in swimming.