Lots of things—poor running mechanics, muscle imbalances, and nagging injuries—can spring up because of a weak core.
That’s because a solid base is one of the most fundamental parts of what Dr. Jordan Metzl, one of the top running doctors in the country, calls a strong “kinetic chain”—that interconnection of muscles and joints from your lower legs up through your core and all the way up to your shoulders. When one part of that chain is faulty or weak when you’re running, the rest will crumble.
Ηow do your muscles decide whether to use carbohydrate or fat during aerobic exercise
BY ANNINIA HADJILOIZOU
The higher the intensity the greater the reliance on muscle glycogen. Exercise at a low intensity (less than 50% of Vo2 max) is fuelled by fat; as you increase intensity you will use a higher proportion of glycogen than fat.