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1 Rep Max Calculator

Why calculate instead of test your 1 rep max

Knowing your 1 rep max can be a useful tool in monitoring your progress as well as acting as a gauge of your maximum strength. However, testing for your 1 rep max can be problematic.


Firstly, there's a huge amount of stress put on your central nervous system in order to push yourself to the absolute limit. Without sufficient tapering and recovery, this could impact your long term progress.


Secondly, there's also an increased risk of injury. Not only are  you putting your muscles under maximum load, there's a potential to compromise on form in the moment of trying to achieve a new lift.


Lastly, the session in which you test your 1 rep max, is not particularly conducive to your long term progress. Due to the maximum intensity involved, it's likely you'll need some extra recovery before you can return back to your normal programme. During the session itself, while there may be a small gain in top end strength, due to only performing 1 rep at a time, it's likely not enough stimulus to promote muscle growth.


By using the calculator below, you can enter in your best training lifts, and it'll give you your theoretical max lifts. Remember it's only to give you an idea. It will calculate sets up to 10 reps and provide you with 1-5 rep maxes.



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