Why is PULSE helpful?

1. Monitoring Workload (volume & intensity)

At its core, PULSE is a throw counter that accounts for intensity.

PULSE measures the total number of throws each day as well as the intensity or stress (torque in nm) of those throws. The torque values are then normalized based on the athlete’s height and weight to get a total 1 day workload.

These 1 day workloads are used to determine acute workload (workload over the past 9 days) and chronic workload (workload over past 28 days). Daily workloads are weighted so that yesterday’s throws count more than one week ago. You can learn more about how these are calculated in this ‘What is throwing workload?’ article.

Based on your acute workloads and chronic workloads, we can prescribe a 1 Day Workload that gives you a better idea of not only how much you should throw today, but at what intensity as well. Following high volume-high intensity days, you would expect your Prescribed 1 Day Workload to be lower, whereas after days of rest your Prescribed 1 Day Workload would be higher indicating you are ready to let it eat.

What is A:C Ratio?

A:C Ratio provides a rule of thumb for coaches to use when making programming decisions and evaluating the readiness of their pitchers on game day.

Dividing the acute workload by the chronic workload gives an athlete’s A:C Ratio:

  • A:C Ratio = 1.0 means that the athlete is in “Maintenance Mode”
  • A:C Ratio > 1.0 means that the athlete is “building workload”
  • A:C Ratio < 1.0 mean that the athlete is “deloading”

It is recommended that athletes stay within an A:C Ratio of .7 to 1.3. “Caution zones” are considered between 0.4-0.7 and 1.3-1.6. Anything outside of those ranges would be considered sub-optimal. These numbers fluctuate on a day-to-day basis so it is possible to be under 1.0 one day and above 1.0 the next.

Coaches or athletes can use A:C ratio and chronic workload numbers to evaluate if an athlete:

  • is throwing too much or too little
  • is throwing with too high of an intent on recovery days

Note that until 28 days have passed since the athlete’s first throwing session, motus will use formulas to estimate chronic workload based on the data that it has available. A workload in the caution or danger zone early in an athlete's program is possible while the athlete is still building workload and should be taken in context.

A:C Ratio is directly factored into an athlete's Prescribed 1 Day Workload to account for the fatigue an athlete has built up in the past few days, as well as the athletes overall throwing fitness.

The general purpose of monitoring workload is to optimize performance and reduce the potential risk of injury.

3. App Usage

  • TRAQ Integration:
    • Coaches and athletes can access PULSE data in TRAQ:

  • OS App:
    • Coaches and athletes can access PULSE data in the PULSE app for iOS devices:

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