Does working out improve productivity?

This is a medical explanation of this claim that Exercise improves productivity.

Over a shorter time-frame, an exercise routine can give you more energy  throughout the day. Most of your cells contain components called  mitochondria, often referred to as the cell's "power plant."  Mitochondria produce the chemical that your body uses as energy, known  as ATP. Physical exercise stimulates the development of new mitochondria within your cells, meaning that  your body will be able to produce more ATP over time. That gives you  more energy to exert yourself physically, but it also means more energy for your brain, boosting your mental output.
When you exercise, your body releases several different chemicals in your brain, collectively known as neurotransmitters.Although the mechanisms aren't fully understood, these neurotransmitters  seem to reduce the discomfort of exercise and create the sensation  often referred to as "runner's high."And this results in more productive and less stressed at work.
How can a 12-year-old get muscular really fast?

Jablonowskij states that the force:Up to 11 years is insignificantFrom 12 to 15 years increases considerablyFrom 15 to 18 has an intense developmentThe growth period is particularly suited to the development of strength through training. It will be necessary to pay attention to the posture during the execution of the training. Given the possible evolution of the strength,

Do macros matter more than calories or vice versa? If I don't eat enough protein I lose muscle. If I eat too many calories I gain weight. So what's optimal?

When body composition manipulation is the plan, then calories and macros are both incredibly important, but calories are definitely king.Here's how it all works out:Weight loss and weight gain are all functions of the energy balance equation; specifically, what is the difference between calories taken in and calories going out?In a general sense, to