Het aromatase-enzym (het enzym dat testosteron omzet naar oestrogeen) bevindt zich voor een groot gedeelte in vetweefsel. Hoe meer vetweefsel je hebt des te meer testosteron er omgezet wordt naar oestrogenen met alle gevolgen van dien.
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maar je hebt ook oestrogenen nodig om te gainen man ...
Testosterone
Too much: Rarely an issue
Too little Increase in body fat, decrease in muscle mass
Estrogen
Too much: Increase in body fat
Too little: Joint issues, health issues, slower muscle gain
Cortisol
Too much: Slower metabolism, decrease in muscle mass, increase in body fat
Too little: Rarely an issue
Thyroid
Too much: Difficulty gaining weight, muscle weakness, fatigue
Too little: Slower metabolism, fatigue, increase in body fat
Insulin
Too much: Insulin resistance, increase in body fat , increase in blood pressure
Too little: Type-I diabetes
Very Low Body Fat Levels: For most, having very low body fat levels will result in suboptimal hormone levels (such as decreased testosterone and increased cortisol) that will impede long-term muscle gains. Obviously, competitive bodybuilders get much leaner than this for competitions, but it's not something most will maintain year round, especially if they're trying to get bigger.