About growth hormone and eating before bedtime

Insulin and growth hormone are antagonistic hormones in relation to each other. Typically, high blood glucose / insulin levels lower growth hormone levels, and conversely, low blood glucose / insulin levels increase growth hormone levels.

But the bottom line is that on its own, GH does not have such an anabolic character, and any of its anabolic effects are manifested in interaction with the insulin-like growth factor-1 (IGF-1, also called Somatomedin).

The liver produces IGF-1 with the secretion of GH, as well as with many other related factors at the right time and in the right place (including in the presence of adequate daily calories, proteins, etc. In addition, IGF-1 can be secreted by the muscle cells themselves.

Growth Hormone and muscle gain

As for the effect on muscle growth, I can't agree with the importance of the role of GH for muscle growth. In studies where one group of subjects (engaged in strength training) was injected GH exogenously, and the other did not receive it, there was no significant increase in muscle mass compared to the group of people who did not receive GH injections.

It is known that growth hormone levels increase significantly during periods of fasting and on an empty stomach. But despite the fact that, at high glucose/insulin levels, the secretion of growth hormone decreases, especially at rest, the question is how significant this effect will be in the presence of physical exercises.

Moreover, after starting a training, insulin levels begin to fall almost immediately due to the secretion of catecholamines, so I think a 5-10 minute warm-up will reduce any high levels of insulin raised by high-carb foods. And overall, I'm not sure that the overall hormonal response from exercise will be critical for muscle growth. That is, in my opinion, the overall training effect of the quality strength training will play a much more significant role than any hormonal splashes.

Thus, it is likely that the manipulation of hormonal levels of GH (or testosterone) by strength training, certainly has its advantages, but I still believe that high-quality strength work, etc. is more important factor for muscle growth.

Regarding carbohydrate intake before an evening workout, you should understand the following: to get a good hormone response from your GH after your workout, you must have enough blood glucose to ensure a high workout intensity. Yes, it's wonderful that you will get a good splash of HG level from a "hungry" workout, but what does it matter if the training itself goes sluggishly and anyhow?

What about the morning?

The same can be said about disputes regarding food in the morning before training. If you train early in the morning on an empty stomach, then you can certainly get a greater response on the secretion of GH, but the main disadvantage of such a training will be that it occurs in conditions of low blood sugar.

And if your training goes badly because you had neither strength nor energy, then you will not grow, no matter how significant the hormonal response from training is.

Regarding carbohydrate intake after exercise, at least one study has shown that the combination of protein and carbohydrate taken after exercise increases both insulin levels and growth hormone levels.

The reason is that carbohydrates lead to an increase in insulin levels, which then leads to a decrease in blood glucose (this works insulin), which in turn causes the release of GH.

Ultimately, I think that replenishing muscle and liver with glycogen after exercise is relatively more important than over-worrying about trying to achieve high levels of GH during sleep, etc.