Strength and cardio

Muscle hypertrophy – the growth of muscles – is what half of sports nutrition is sold for. A new preprint promises another route to it: haemoglobin hydrolysate, which allegedly triggers muscle growth directly. It sounds like a breakthrough. But muscle hypertrophy is shown here in fish, mice, and cells in a test tube – there are no humans in the study. Let's break down what they actually found…