Short answer: Human Growth Hormone matters. We all make it. Some make less as we age, some make more safely through certain types of exercises, certain AMOUNT of exercise, quality sleep, temperature and nutritional choices.

At a glance:
– HGH induces bone growth, regulates metabolism and electrolyte
– It decreases body fat, maintains muscle mass and strength
– It indirectly helps to maintain, build and repair healthy tissue in the brain and other organs
– It affects the immune system, cardiovascular system, central nervous system and ageing
– Abnormal HGH levels can have a negative impact
– Older people have lower levels when compared to younger individuals and as the body’s production of HGH falls, the resources your body needs to repair damage diminishes which can negatively impact the immune system, energy levels and fat distribution.

In simple terms – a good lactate workout and quality sleep for growth and cell reproduction.
Specifically, heavy resistance exercise has been shown to increase growth hormone in both men and women, according to a small June 2015 study published in [Growth Hormone & IGF Research]