Nutrients for Hikers and Outdoor Enthusiasts: The Overview

First things first: On long, sweaty tours, electrolytes matter most of all – magnesium and potassium for muscles and nerves – along with a steady energy supply from B vitamins and enough carbohydrates. If you do a lot of endurance activity, it’s also worth keeping an eye on your iron status. For short, leisurely hikes, on the other hand, plain water is usually enough.

The alarm goes off at five, your backpack is packed by the door, and 1,400 metres of ascent lie ahead of you. Being out in nature is balm for the mind – but for the body it’s genuine, sustained work. Sweat carries away fluid and minerals, the muscles work for hours on end, and at altitude the dry, sunny air takes its toll. At the same time, your backpack only holds what you’re actually willing to carry. That’s exactly why it pays to think your supply through in advance.

Electrolytes: What sweat costs you

Anyone out for hours will sweat – and with the sweat, it’s not just water that leaves the body, but minerals too. On hot days and steep climbs, the loss can be considerable. Magnesium and potassium in particular are central here, because they are involved in muscle and nerve function:

How to keep an eye on your electrolyte balance under exertion is explained in Sport, electrolytes, magnesium and potassium. For hot days, Electrolytes in summer heat helps. Important: For short, leisurely hikes, water is entirely sufficient. Only on long, sweaty tours does a targeted electrolyte intake become worthwhile. Which form of magnesium is suitable on the trail is clarified in Which magnesium is the best?

Approved claims: what you may actually say

So that you know what the recommendations are based on, here are the key approved functions in compact form: Magnesium contributes to normal muscle function, to electrolyte balance, to energy metabolism and to the reduction of tiredness. Potassium contributes to normal muscle and nerve function. The B vitamins contribute to normal energy metabolism. Iron contributes to oxygen transport and to the reduction of tiredness. Vitamin D contributes to the maintenance of normal muscle function. These are the functions that interest outdoor enthusiasts – and they are all soundly substantiated, not a marketing promise. That’s exactly why you can rely on them when planning.

Energy for the long kilometres

Hiking often means many hours of steady exertion. For your metabolism to release energy from food, the B vitamins are important: vitamin B12, B6, niacin and riboflavin contribute to normal energy metabolism. Magnesium complements this, as it too contributes to normal energy metabolism and can reduce tiredness. How this interplay works is described in Energy with magnesium, iron and B vitamins. On the tour itself, quickly available carbohydrates from dried fruit or bars are practical for replenishing your reserves – the classic trail mix is no coincidence.

Iron and oxygen transport

Endurance places demands on oxygen transport. Iron contributes to the normal formation of red blood cells, to normal oxygen transport and to the reduction of tiredness. Anyone who regularly does a lot of endurance activity in particular should know their iron status, because a low value can affect performance. However, don’t supplement on suspicion – have the value determined by a doctor if needed. More in Recognising and preventing iron deficiency and Nutrients for runners and endurance.

Sun, altitude and vitamin D

Outdoors you get plenty of daylight – a plus, because sun on the skin stimulates the body’s own vitamin D production. Vitamin D contributes to the maintenance of normal muscle function and normal bones. In the dark season or on shady forest tours, your status can drop. At the same time, remember sun protection for your skin in intense mountain sunlight. Background in the dark season and vitamin D and Supplements and sun.

The mechanism behind it: Why electrolytes decide the final kilometres

Why exactly do you feel it in your legs first on long tours? Muscles and nerves work via tiny electrical signals, and for this your body needs a fine balance of charged minerals – above all sodium, potassium, magnesium and calcium. If you sweat for hours, this balance shifts: water and salts are lost, and signal transmission becomes sluggish. Magnesium contributes to electrolyte balance and to normal muscle function, potassium to the normal functioning of the nervous system. If you then only drink pure water without salts, you can even worsen the imbalance. That’s exactly why, on long, hot tours, water plus electrolytes – not water alone – is the smarter approach. Details in Magnesium vs. potassium.

What research is investigating

It is well established in sports physiology that sweat costs water and electrolytes, and that muscle and nerve function depend on magnesium, potassium and calcium. Actively researched are how strongly individual sweat electrolyte loss varies (it is highly person-dependent), how altitude affects fluid balance and performance, and what role iron status plays in endurance athletes. What follows from this for you: blanket quantity figures are of little help – what matters is adapting your intake to the duration, heat and intensity of the specific tour.

In practice: the nutrient roadmap by tour length

Not every tour needs the same preparation. This overview helps you match the effort to the exertion:

As a rough guide: the longer, hotter and steeper the tour, the more a targeted intake is worthwhile. If you want to know whether supplementation is even worthwhile for your own activity level, you’ll find ideas in Nutrients for occasional athletes.

Food and fluids on the trail

The best supplement is of little use without solid foundations. These rules have proven their worth:

• Drink regularly in small sips, not only when you’re thirsty.
• Bring nutrient-rich snacks: nuts, dried fruit, wholegrain products.
• Deliberately plan electrolytes for long and hot tours.
• Adapt supplementation to the actual exertion – a look at the timing helps.
• Always test new products at home first, never on the big tour.

Recovery after the tour

The trail is done, the shoes are off – now recovery counts. After a demanding tour, the body wants to replenish fluid and electrolytes and let the muscles recover. A wholesome meal with carbohydrates and protein is the best basis for this: carbohydrates refill the energy stores, protein provides building blocks, since protein contributes to the maintenance of normal muscle mass. After sweating, drink deliberately, and on long, hot tours feel free to include some electrolytes rather than just plain water. Magnesium contributes to the reduction of tiredness and fatigue – one reason it’s on the plan in the evening for many active people. How recovery in sport works overall is explored in more depth in Nutrients for recovery after sport.

Multi-day tours, warmth, cold and altitude

Several days in a row add up the strain, shorten recovery and put your provisioning to the test. Alongside magnesium and potassium, B vitamins and – depending on your starting point – iron come more strongly into focus. Recovery also needs support: enough protein helps, since protein contributes to the maintenance of normal muscle mass. Conditions change your needs: in heat, sweat loss rises considerably; in cold, people often drink too little because the sensation of thirst diminishes; and at altitude, dry air draws out additional fluid. So adapt your intake deliberately instead of approaching every tour the same way. Further ideas: Nutrients for fluid balance and Spring fatigue and nutrients.

An honest assessment: Is supplementation even needed?

Not every hike needs extra supplements. For a Sunday stroll or a short half-day tour, a balanced diet and water are enough. Targeted nutrient intake only becomes interesting once duration, intensity, heat or altitude clearly challenge the body. Then electrolytes and a good energy supply can decide whether the final kilometres are still enjoyable. Principle: first the solid foundation, then the targeted supplement. An honest assessment is offered in Supplements: sensible or a waste of money?

Matching products from Scheunengut

For outdoor enthusiasts, products from Sport & Fitness are suitable, such as Magnesium and Potassium for electrolyte balance. Anyone keeping an eye on their iron status will find suitable options under Iron. All products are lab-tested and made in Germany. Read on: Nutrients for amateur athletes and Recovery after sport.

Frequently asked questions (FAQ)

Which nutrients are most important when hiking?

On long, sweaty tours, the electrolytes magnesium and potassium take centre stage, because they contribute to normal muscle and nerve function and the body loses them through sweat. Added to this is a steady energy supply from B vitamins and carbohydrates. For short, quiet hikes, on the other hand, plain water is usually enough.

Should I take electrolytes before every hike?

No. For short, leisurely tours, a balanced diet and enough water are sufficient. A targeted electrolyte intake through magnesium and potassium only becomes interesting on long, hot or intense tours, when sweat loss rises considerably. It’s best to test new products at home beforehand.

How much should I drink on a long tour?

As a rough guide: drink regularly in small sips, not only when you’re thirsty. Your needs rise considerably in heat and at altitude, while in cold people often drink too little because the sensation of thirst diminishes. So adapt the amount deliberately to the conditions.

Is iron a concern for hikers?

For occasional hikers, usually not. But anyone who regularly does a lot of endurance activity should know their iron status, since iron contributes to oxygen transport and to the reduction of tiredness, and a low value can affect performance. Don’t supplement on suspicion – have the value determined by a doctor if needed.

This article serves as general information and is no substitute for individual medical advice.