Feeling good after exercise and doubled learning efficiency are the results of the combined effects of physiology and brain mechanisms. It's entirely a scientific phenomenon, not an illusion:

1. Mood improvement: The body is "automatically secreting happy hormones"

- Endorphins: Secreted in large quantities during exercise, natural "painkillers + antidepressants," directly alleviating anxiety and irritability

- Dopamine: Enhances pleasure and satisfaction, making people feel relaxed and accomplished

- Serotonin: Stabilizes mood, improves sleep, and reduces overthinking and internal friction

- Cortisol (stress hormone) decreases: Exercise is the best "pressure relief valve," worries are directly diluted

2. Doubled learning efficiency: The brain gets a "hardware upgrade"

- Dramatic increase in brain blood and oxygen supply: Brain cells become more active, reactions speed up, and memory strengthens

- BDNF (Brain-Derived Neurotrophic Factor) rises: Equivalent to "fertilizing" the brain, promoting neuron growth, making it easier to remember things learned

- Better concentration: After exercise, distracting thoughts decrease, it's harder to lose focus, and entering a flow state becomes faster

- Brain fatigue is reset: The brain fog caused by prolonged sitting can be significantly cleared with just 10 minutes of exercise

Simple summary

Exercise = Clearing the brain's cache + Charging emotions

You are not "relying on willpower to study," but your body is actively helping you enter an efficient state.

This is also why many top students and investors have regular exercise habits:

Get the body moving first, then the mind can start working.