Energy flows and Matter Cycles

This is a concept familiar to biology and physics. When energy enters a system, that system makes use of it by cycling. Think of a water mill. Water moves past the wheel, turning it, creating hydropower. We actually use the same mechanism to create motion when we walk, and we use those same mechanics in every activity we perform.

Walking in traditional physical therapy textbooks is described by the term the “gait cycle”. This cycle is a form of propulsion. Although a rather boring topic for most, the subtleties of this activity are incredible. Subtleties aside, this form of propulsion is how we move in all aspects. Barbell back squats, landmine presses, and box jumps all use the same mechanics to propel us through the movement. What it ultimately comes down to is absorbing energy from the ground, cycling it through our system and producing energy on the other end.

When we walk the first thing that happens is our heel and forefoot strike the ground, absorbing energy from it. That energy is cycled through tissues creating spin which then propels the other foot forward, and on we go. As we descend in a squat, we are absorbing the flow of energy from the ground and storing it, so that when we begin to come out of the hole, we can produce enough energy to overcome the bar on our shoulders. These principles apply to all things in nature, including every activity we perform. The ways in which we program exercise can bias these principles in ways that lead to greater success in our activities of choice.

Movement is based on simple rules. Complexity emerges from these rules which is fascinating and difficult to manage or even understand. That being said, we can identify them and make better decisions for ourselves when it comes to exercise and movement.

Austin Ulrich, Physical Therapist