High-intensity exercise changes how muscle cells manage calcium

Torso shot of a young man with bare chest lifting dumbbells. Fit young man exercising with dumbbells on grey background. Cropped image of sweaty bodybuilder.

Torso shot of a young man with bare chest lifting dumbbells. Fit young man exercising with dumbbells on grey background. Cropped image of sweaty bodybuilder.

Researchers at Karolinska Institutet in Sweden have discovered a cellular mechanism behind the surprising benefits of short, high-intensity interval exercise. Their findings, which are published in the scientific journal PNAS, also provide clues to why antioxidants undermine the effect of endurance training.

A few minuets of high-intensity interval exercise is enough to produce an effect at least equivalent to that achieved with traditional much more time-consuming endurance training. High-intensity exercise has become popular with sportspeople and recreational joggers alike, as well as with patients with impaired muscle function. However, one question has so far remained unanswered: how can a few minutes’ high-intensity exercise be so effective?

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Do you buy local? Your consumer ethnocentrism may be showing

buying with credit card in us state of hawaiiAre you are one of the many consumers who prefer domestic to foreign products, even when the domestic products are lower in quality and cost more? Why is that? As a new study in theĀ Journal of International Marketing explains, you are exhibiting what is known as consumer ethnocentrism–a thirty-year-old concept, says the study, whose conceptual boundaries and measurement need to be extended.

“Since its initial formulation in 1987, the concept of consumer ethnocentrism has remained by and large unchanged,” write the authors of the study, Nikoletta-Theofania Siamagka (King’s College London) and George Balbanis (City University London). “But empirical evidence from a number of studies shows that consumer ethnocentrism has a multidimensional structure, a structure too complicated for the current working definition, which basically considers only one dimension, the moral dimension, of purchasing foreign products.”

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