FitLine® for Fitness & Sport

The plan is set, the shoes are broken in — and still, the third session of the week sometimes feels tougher than the first. That is not a sign of weakness, it is everyday training life: what you can deliver in a workout is prepared by your body between sessions. Sleep, food, hydration and the question of whether the nutrients you need are on board all play a part in how well you recover and how the next session feels. Two topics come up again and again. The first is magnesium: when your calves twinge after sport, many people think of this mineral first — and there is a reason for that. Magnesium plays a part in muscle function and energy metabolism; both are now officially recognized (EFSA). If you train hard on a regular basis, you lose extra magnesium through sweat — your intake then deserves a closer look. The second topic is protein, or more precisely: the amino acids it is made of. They are the building blocks your body uses to build muscle protein — after training just as much as during the night that follows. What amounts are realistic, what separates essential from non-essential amino acids, and why timing matters less than the ads claim: all of that can be explained soberly, without a single promise. That is exactly what the articles below do. You will not find big words there, but numbers, sources and examples from everyday training: which foods deliver plenty of magnesium, how to roughly estimate your protein needs, and how to tell that your recovery is falling short. The rule of thumb up front: the foundation is food, movement and hydration — a supplement steps in where everyday life falls short. If you want to go deeper, start with the topic closest to your training: muscle function, amino acids, or the question of how to read tiredness after sport. Each article stands on its own, names its sources and says honestly what research knows and what it does not. That way you build up, piece by piece, the knowledge that fits your training — at your own pace, no pressure.