The Push-Up as a Diagnostic Tool

The push-up, done correctly, reveals almost everything about upper body pushing health and capacity. Here's what to look for.

Alignment: in a perfect push-up, the body is a rigid plank from head to heel. Sagging hips mean weak core. Hiking hips mean tight hip flexors or incorrect position sense. Both indicate training priorities.

Scapular control: at the top of the push-up, the shoulder blades should be protracted (pushed apart). If they wing — lifting away from the back — the serratus anterior is weak. This is relevant for every pushing movement that follows.

Elbow path: elbows at 45 degrees from the body is generally the most shoulder-friendly position. Elbows straight out (90 degrees) stresses the shoulder in horizontal abduction. Elbows fully tucked (0 degrees) is fine but mechanically harder.

Range: full range means chest grazes the floor. Partial-range push-ups don't develop the full strength and leave tissue in the shortened position chronically.

The test protocol: do 10 push-ups with maximum attention to form, film from the side. What you see tells you your pushing quality, your core engagement, and your scapular control all at once.