Just figured out after years of doing this wrong - if your legs feel heavy on easy runs, you're probably not eating enough carbs the day before. Spent three months thinking I'd lost my fitness until I actually tracked what I was eating. Game changer. Sometimes the answer isn't training harder.
Kate MorrisonThis is such a good reminder — I do the same thing with baking, convinced I've lost my touch when really I've just skipped lunch!