A couple weeks ago, we broke down the movements of a couple...

A couple weeks ago, we broke down the movements of a couple world class lifters. Today, Lester Ho (@lesterhokw) is here to discuss how to analyze body positions and movement in relation to the data provided by these charts.

Understanding Iron Path.

Apps like Iron Path are wonderful tools for a coach to do simple biomechanical anaylses for the lifts.

However, there needs to be a proper understanding of what the app provides in terms of information.


This is measured using the plate as a reference. Not only to track the bar path. But to determine distance. This is why placing the tracking disc on the plate needs to be accurate if you intend to get an accurate reading of bar velocity. This is also why if you are using a video from an angle, bar velocity values and even the bar path is skewed so you can’t properly determine what’s going on.


Many mistake reading the bar velocity graph to understand acceleration. Acceleration is change of velocity over time. So the gradients you see in regards to bar velocity may indicate acceleration or deceleration but does not tell you how much acceleration is occurring.


When reading this graph, the assumption made is the reference to how force is actually generated in the lifts which is through the feet. Yes. Such measures are only possible if there is a force plate available. But the app calculates force based off the acceleration/velocity graphs and also the weight used. So the important thing is to know that the force values can be contributed from not just the legs but in fact the entire system of the body including the torso, shoulder and arms.

So saying all that, applying all that information and now observing body positions at various peaks of the graphs provide a better idea of what the lifter is doing or utilising.

Disclaimer: These are just my observations of the Iron Path app. I have no association with the developers so this is based off one’s experience with the app.

#FuBarbell #TheTrainingGeek #IronPath #Biomechanics