Make Running a Total Body Effort.
Use your arms.
The first time I saw Olympic sprinters sprint, I was struck by how muscular and defined the muscles of their upper body and torso appeared beneath their jerseys.
You’ll get more out of your running workouts if you can focus on the rhythm and pump of your arms.
Pump the arms like pistons, elbows driving back and high, then hands driving forward.
Energy spent bringing the arm across the front of the body is wasted energy – keep the arms charging forward and back, no twisting.