In the mornings on the way to the gym you’re freezing in short sleeves, and after warming up you’re sweating your soul out – the transition period makes choosing the right training gear unnecessarily complicated. Yet, it doesn’t require complicated equipment, just the right principle. We’ll show you what matters.

What is the layering principle for training?

The layering principle means wearing several thin layers of clothing on top of each other instead of one thick item – this allows you to adapt to the temperature instead of being at its mercy. In sports, it traditionally consists of three layers: a base layer directly against the skin that wicks away moisture, an optional middle layer for extra warmth, and an outer layer that you can take off as needed.

In the gym, you generally only need the first two layers – the gym hall is rarely as cold as a mountain path in October. The first layer directly on your skin is the most important, as it determines how you feel throughout your entire workout.

Why a base layer makes sense in the gym

A base layer is the layer that sits directly on your skin and has two jobs: to wick moisture away from your body and regulate temperature. Sounds like outdoor gear for hiking or ski touring – but it works just as well for strength training or cardio during the transition period.

The advantage is most apparent during the warm-up. Your body needs a few minutes to reach operating temperature – during this phase, you quickly cool down in thin, short clothing, especially if the hall temperature in autumn is already lower than in summer. A close-fitting base layer like our "Spider" turtleneck long sleeve keeps you warm during this initial phase without causing you to overheat later during your main set – because the material wicks away moisture instead of trapping it.

The most common mistake during the transition period

The classic: You dress for the cold outside – thick sweater, long-sleeved shirt – and ten minutes later you’re standing in the gym soaked in sweat because the hall is heated and your body has long since reached operating temperature. The result is uncomfortably wet clothing that lets you cool down quickly during training breaks – paradoxically, exactly the problem you wanted to avoid.

The solution isn't thicker clothing, but the right clothing. A compression fit like our long sleeve compression shirt fits snugly against the body without adding bulk, and the quick-drying material ensures that you won’t be left in wet clothes even during intense sets. Cold outside, warm inside – that’s what the transition period is made for, not for compromising on your choice of clothing.

Short sleeve or long sleeve: What fits when?

A simple rule of thumb helps with the decision: If the outside temperature on the way to the gym is still above 18 degrees, a short-sleeve shirt with a light jacket for the commute is usually enough. If it gets cooler, a long sleeve as a base layer makes more sense – especially if you have to go back out into the cold immediately after training and don't have time to change completely.

The type of training also plays a role. In strength training with longer breaks between sets, you cool down faster than with continuous cardio – here, a long sleeve is more worthwhile than during an intense HIIT workout where you are in constant motion anyway. If you alternate between the two, a close-fitting long sleeve like our turtleneck model is the more flexible choice because it wears just as well under an additional layer as it does on its own.

Material check: What you should look for

Not every long sleeve is suitable as a base layer. What matters:

• Breathability – the material must transport moisture away from the skin, otherwise the extra layer is useless.
• Quick-drying – important for the transition between warm-up, main set, and cooldown without you freezing in wet clothes.
• Tight but flexible cut – a compression fit lies snugly without restricting freedom of movement during squats, bench presses, or overhead movements.
• Not too thick a material – a base layer should insulate, not make you sweat. Thick cotton shirts are the wrong choice here because they soak up moisture instead of wicking it away.

Exactly this combination – snug fit, breathable, quick-drying material – can be found in our compression shirts, whether as a short sleeve for milder days or as a long sleeve for the cooler weeks that are now coming.

Frequently asked questions

1. Is a turtleneck too warm for training? No, as long as the material is thin and breathable. A turtleneck long sleeve made of functional material insulates the neck without overheating the rest of the body – unlike a thick sweater, which you would rather wear as a transition jacket on the way to the gym.

2. Can I also wear my summer compression shirt in the autumn? Yes, as a short-sleeve base under a light jacket it works well as long as the temperatures are still mild. As soon as it becomes noticeably colder in the mornings, it is worth switching to a long sleeve so that you don't freeze before your workout even begins.

3. What is the difference between a base layer and a normal sports shirt? A normal sports shirt is usually cut more loosely and designed primarily for looks. A base layer sits tightly against the body, is optimized for moisture management, and is made to function as the first layer on the skin – even under other clothing.

The transition period doesn't have to be a compromise between freezing and sweating. With the right layer directly on your skin, you’ll get into your workout warm and get out dry – and you’ll also be ready when it finally gets colder in October.