Daily briefing: Exercise rewires the brain for endurance, in mice

"Repeated exercise sessions on a treadmill strengthen the wiring in a mouse's brain, making certain neurons quicker to activate. Researchers found that this 'rewiring' was essential for mice to gradually improve their running endurance, which suggests that the brain is actively involved in the improvement of a physical ability with practice. "Exercise is not just about muscles breaking down and building up," says neuroscientist and study co-author Nicholas Betley. "It's changing your whole brain.""

"The US Environmental Protection Agency (EPA) has revoked the 'endangerment finding' - the conclusion that it can regulate greenhouse gases because they endanger public health and wellbeing. At the same time, it repealed emissions standards for vehicles - something that, by several estimates, will add billions of tonnes of greenhouse gases to the atmosphere in the coming decades. Rules for power plants might be next."

"Can social media be addictive to young people? A jury in California is being asked to decide - even though the question still divides researchers. The young woman at the centre of the case alleges that she became addicted to social-media platforms as a child, causing the anxiety, depression, and body dysmorphia that she lives with today. Scholars expect to see a "a battle of the experts" to debate 'dopamine hits' of intermittent reinforcement, how our brains respond to"

Repeated treadmill exercise strengthens neuronal wiring in mice, making certain neurons quicker to activate and enabling gradual improvements in running endurance. The brain is actively involved in improving physical abilities through practice, not just muscle adaptation. The US Environmental Protection Agency revoked its greenhouse-gas 'endangerment finding' and repealed vehicle-emissions standards, a move likely to add billions of tonnes of greenhouse gases and to jeopardize future power-plant regulations. A California jury will consider whether social media can be addictive to young people, with experts expected to debate dopamine-driven intermittent reinforcement and mental-health impacts. Researchers also traced the source of a rare COVID-vaccine side effect and described 'phantom pain' responses to biodiversity loss.

Read at Nature