When (and when not) to edit your 4DP profile


Manually Modifying Your 4DP Profile: The Dos and Don'ts

The app gives you the ability to manually adjust your 4DP values. Perhaps you feel that one aspect of your fitness has improved recently and, while you don’t want to adjust your entire profile you do want to, say, tweak your 5-second power a bit upwards.

If can be useful to adjust a part of your 4DP profile in the middle of a training plan without re-testing if you feel significant gains have been made in one particular area. But, BEWARE! Manually changing elements of your 4DP is not something we recommend as arbitrary adjustments can have huge, potentially negative implications for your workouts. It’s not just the individual values, but the relationships between them that are important and any changes not done through a test can alter those relationships.

So, if you insist on adjusting one particular element of your 4DP profile, we suggest you do the following to get a proper view of what it should be (rather than guessing):


  • Neuromuscular Power (5 second): If you think that your sprint targets are low, then fire up Full Frontal and do the sprint test of two efforts and see if things have changed.
  • Anaerobic Capacity (1 minute): If you think your AC should go up or down a bit, then ride The Omnium. By the time you make it to the kilo interval your legs should be fairly well wrecked.  If your average power for the Kilo is higher than your Full Frontal-set AC, you can adjust AC up 2-3%.
  • Maximal Aerobic Power (5 minute): If you’re just slaying the 3-6 minute efforts in your workouts, then go and hit Nine Hammers as hard as you can. If you hit the power targets on every hammer, and then have a little juice left in the tank for the final minute of Hammer 9, then go ahead and bump up your MAP by 1-3%
  • Functional Threshold Power (20 minute): Those long threshold efforts leaving you wanting more? Then go and ride Hell Hath No Fury. If you make it through the first 20 minute effort at 100%, then increase the intensity to 105% for the second.  If you can make it to the end of that 20 minute effort without too much trouble (and be honest here, we are not talking about just “making” it to the end, but having it feel like a 7 and not a 7.75) then you can increase your FTP by 2-3%.


We don’t recommend adjusting any more than one aspect of your 4DP profile between tests. If you feel that more than one aspect needs to be adjusted, then it’s best to just front up to Full Frontal. The exposure is never easy, but you just might be pleased by what you see.

For more detailed information, check out this article by Sir Mac Cassin:


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