In training videos and blogs for triathlon or cycling often FatMax is being used as the threshold at or under which low intensitiy training should be performed. As far as I understood that is the HR where your absolute consumption of fat is highest.
At Uphill Athlete, we use AeT, which is defined as the HR at which the ratio between fat consumption and glycogen consumption is 1:1.
To me, the FatMax value kind of makes more sense for the goal of optimizing fat metabolization. What is the reasoning for UA using AeT anyways? Or are FatMax and AeT so close that it doesn’t really make a difference?
Thanks in advance,
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