The foundation is planning. You need to know your caloric needs — your basal metabolic rate plus your activity level — to understand how much energy your body actually requires. Based on that, you structure your macronutrients: protein for muscle growth and maintenance, carbohydrates as the main energy source for endurance, and fats for overall health. The key point is to adapt your nutrition to your training. More workload means more energy demand. Nutrition is not static, it must adjust to your training phases.

Your training plan always depends on your current focus. You cannot maximize everything at the same time. Example with a running focus: 5 running sessions per week, 3 full-body strength sessions, plus mobility work. Running is the priority, while strength training supports muscle maintenance, stability, and injury prevention. In a strength-focused phase, this balance shifts accordingly. The key is having a clear focus and a structured plan.

In a military context, you must learn to perform under fatigue. You train this deliberately: for example, pre-fatigue sessions like heavy leg training followed by running, or upper body training followed by rowing. You can also structure multiple sessions per day — running in the morning, short recovery, training again later, and possibly marching in the evening. This teaches your body to perform even when it is already fatigued.

However, this must be built progressively. Muscles adapt quickly, but tendons and ligaments take much longer. You need to increase load gradually to avoid injury while building resilience.

The biggest mistake is lack of focus. Many people try to maximize strength and endurance at the same time. This usually leads to stagnation or overtraining. The solution is simple: work in phases with a clear focus and maintain the other qualities at a solid level.

Mental strength is built through discomfort, not comfort. You have to deliberately go into situations that are challenging and uncomfortable. That means pushing your limits, not avoiding difficulty, and finishing what you start.

A key factor is working on your weaknesses. You need honest self-reflection to identify your weak points and then systematically attack them. At the same time, set realistic goals. If your goals are too high, you will fail repeatedly and lose confidence. Good goals challenge you but remain achievable.

Training: a structured plan with a clear focus and measurable progress. Nutrition: know your caloric needs and adjust your intake to your workload. Mental: discipline, focus, and the willingness to face discomfort and overcome it. These three areas work together and determine your overall performance.