What is a PK Score?

PK Fitness introduces a new way of characterizing workouts called the PK Score. Using a PK Score, every workout is characterized by two numbers that combine to create a PK score.

The P factor, a user’s average effort, and the K factor, the duration of a workout. The P factor ranges from 0 to 100 corresponding to a user’s resting state and maximal exertion state respectively. The K factor is expressed in minutes.


PK Score fitness

What is a “good” PK Score?

The short answer is “it depends”.

In an effort score, the P factor, provides an objective measure of how hard you worked for a particular workout. Answering the question of what a “good” P score is requires knowing a bit more about the context of the workout. Workout type, for example, can be a big determining factor in the expected range of the P factor of your PK Score. Another important factor is what is your overarching goal.

Here’s an analogy that may help to explain. The P factor is like a speedometer for your body. In an automobile, If we asked what is a “good” speed, we would need more context to provide a meaningful answer. Are you in a school zone? Are you on the Autobahn? Is there fog or rain? Are you trying to conserve fuel? or are you in a race? All of these questions will have material effect on whether or not 50 MPH is a “good” speed.

In the same way, answering the question about a target P score requires context. The best answer to this question will likely come from an experienced training professional or your physician. However, one important element in determining at least the range of expectation for your P factor is the type of activity in your workout. Take a look at the chart below to get a sense of a few workout types and where on the effort spectrum you should expect to fall.

The K factor in the PK Score is simply the duration of your workout. This too requires context to answer what is a “good” K score. If you’re doing a quick set of Abs, perhaps a K score of 10 is good. On the other hand, if you’re focused on building a stronger heart, a K score of 20 or more would be a “good” target score.


What is sensor connectivity?

Sensor connectivity is simply how reliably your sensor was operating during a workout. This is important because if your sensor isn’t functioning properly, PK Fitness may not accurately read your effort!

Why is my sensor connectivity low

The sensor connectivity can be affected by many different things: the type of sensor you are using, the type of exercise you are performing, and how far your phone is from your sensor can all affect connectivity.

For example, if the type of workout you are performing causes your forearm muscles to swell and tighten, then using a wrist monitor may have low connectivity. This is caused by your blood vessels constricting, potentially lowering the accuracy of wrist monitors. For these kinds of workouts, a chest strap monitor will perform the best.

For best results with PK Fitness:

Select your heart rate monitor for the type of workout you plan to perform and be sure to stay within Bluetooth range of your phone to allow consistent, accurate effort readings. See the accompanying table for our workout-based monitor recommendations.