Our expert says:
No reason physiologically, other than maybe you are heavier than when you used to run before, or possibly that you're training indoors now? The key things driving sweating are the exercise intensity (the harder you go, the more you sweat), the environment (high humidity equals more sweat) and body weight (heavier equals more).
So I'm not sure if anything like that has changed. Perhaps the lack of training has created a need for your body to work super hard because you are less efficient than before. However, that will change over time, as you get fitter.
Overall, apart from being quite uncomfortable for you, this is nothing to really worry about. It should go away as you get fitter.
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