How do thin people exercise and gain muscle (a must-read for thin people)

　　Based on my experience in the gym for two years, it’s not particularly easy to answer because I started working out when I was overweight. However, many of my friends and colleagues asked thin people how to exercise and gain muscle, and they all achieved certain results in the end. When communicating with them, I learned some things. Based on the information I searched, I summarized it below for reference.
　　
　　1. Improve the digestion and absorption function of the gastrointestinal tract
　　
　　Many people are thin not because they eat less or don't take in enough nutrients, but because their gastrointestinal digestion and absorption functions are insufficient, so they eat in vain; and some people can't grow strong no matter how much they take supplements. Therefore, fitness and muscle gain must first start with improving the gastrointestinal tract.
　　
　　——You can see a doctor to diagnose your gastrointestinal condition and then prescribe appropriate medicine. Because weight loss can be divided into simple weight loss and secondary weight loss. Simple wasting has no clear endocrine disease , secondary wasting is caused by nerve system or organ of the endocrine system sexually transmitted diseases caused by changes. If it is secondary weight loss, please recover from the illness before exercising exercise。
　　
　　——You can usually eat more stuff that strengthens the stomach and digestion, such as hawthorn tablets and apple cider vinegar, to assist the effects of the medicine.
　　
　　——Regular exercise will promote gastrointestinal digestion and absorption (below we will discuss how to exercise from another angle).
　　
　　——Maintain a regular diet, chew slowly and eat three or four meals a day.
　　
　　——Don't smoke and drink alcohol in moderation.
　　
　　——Be sure to eat hygienic and clean food to prevent diarrhea。