If the exercise work rate is free to vary, then experimental interventions such as
changes in ambient
temperature, oxygen content of the inspired
air, energy substrate availability or the provision of incorrect distance feedback all alter the power output (pacing strategy), whereas the rate of increase
in RPE has been found to be
similar between conditions.13 20 21 24 — 26
Warmer Temps Likely to Blame The original paper gives a number of examples which show that
changes in land use, precipitation, cloudiness and humidity are superimposed on glaciers
similar to those of Kilimanjaro,
in terms of latitude, and that something else is at work... «most obvious would be warmer
air temperatures».