Quick Answer: Gyms are usually kept between about 18 and 20C because people generate a lot of heat once training - which means the first fifteen minutes are genuinely cold, particularly if you are new and moving between machines rather than working continuously. The answer is a removable warm layer for the start rather than warmer clothing overall: a full-zip you can open, long sleeves you can push up, and a base layer that is not cotton.

You walk in, and it is colder than your house.

Everyone else looks fine in a vest, and you are freezing for the first quarter of an hour.

They are not tougher. They are further into the session than you are.

Why do gyms keep the temperature so low?

Because it is set for people who are already working hard, not for people who just arrived.

Exercise generates substantial heat, and a room comfortable for someone standing still is uncomfortably warm for someone mid-set. Most gyms settle around 18-20C as a compromise, and free weight areas are often cooler than studio spaces.

Which produces a real mismatch for newer members:

• You spend more time between sets while learning machines and finding equipment
• You are probably working at a lower intensity than the people around you, generating less heat
• You spend longer standing still reading instructions or waiting for equipment

None of that is a criticism - it is simply what the first few months look like, and it means the room genuinely feels colder to you than to the person next to you.

There is also a cooling effect that catches people out. Air conditioning and fans are aimed at machine areas, and moving air over slightly damp skin feels considerably colder than still air at the same temperature.

And the after-effect matters as much as the start. You warm up, you sweat lightly, you stop - and now damp fabric plus a cool room makes the walk to the changing room genuinely unpleasant. This is the part almost nobody plans for.

What should the layers actually be?

Three pieces, and the top one comes off within fifteen minutes.

Base layer: a fitted long or short sleeve top that is not cotton. Cotton absorbs sweat and holds it against you, which is fine while moving and cold the moment you stop. A synthetic or merino blend costs little and changes the whole experience.

Mid layer: a full-zip. The zip is the entire point. You can open it progressively as you warm up, and take it off without pulling it over your head mid-session. A pullover hoodie means removing it entirely or keeping it on, which is a worse set of options than it sounds.

Legs: full-length leggings rather than shorts, at least for the first few sessions. Legs feel the cold in an air-conditioned room more than people expect, and a mid-weight legging is comfortable across the whole session rather than only the warm part.

What to bring rather than wear:

• A dry top for afterwards. The single most useful thing on this list. Changing out of a damp top before leaving makes the biggest difference to how cold the journey home feels
• Light socks that are not cotton, for the same reason as the base layer
• A small towel, which doubles as equipment hygiene and as a way to dry off before layering back up

On what not to do: do not simply wear a thicker single layer. It solves the first ten minutes and makes the next forty worse, with no way to adjust.

How does this change as the session goes on?

Predictably, which means you can plan it rather than react to it.

The first ten to fifteen minutes are the cold part. Keep the zip layer on through the warm-up. This is not weakness - warming up in a cold room takes longer, and cold muscle is genuinely less ready to work.

Somewhere in the first two or three working sets you will want it open. Open it rather than removing it, which gives you a middle setting.

By the middle of the session it comes off entirely for most people. Have somewhere for it to go - draped over the machine you are using is the usual solution and is worth thinking about in advance rather than carrying it around.

At the end, the reverse happens fast. Put the layer back on as soon as you finish, before stretching or cooling down, because the temperature drop after stopping is sharp.

The cardio caveat: if you start with cardio you will warm up much faster and may want the layer off within five minutes. If you start with weights, expect a longer cold period since the between-set rests keep you cool.

And on the changing room: change out of the damp base layer, not just the outer. Putting a jumper over a wet top and walking outside is the most common way to end up genuinely cold after a session, and it is entirely avoidable with one spare top in the bag.

5 Mistakes First-Timers Make in a Cold Gym

1. Wearing cotton. The single most consequential choice. A cotton t-shirt is fine until you sweat, and then it stays damp for the rest of the session and the journey home. A cheap synthetic top is a genuine upgrade.

2. Choosing a pullover instead of a zip. Without a zip your only options are fully on or fully off, and there is no way to adjust mid-set. A full-zip is the most useful single garment for a cold gym.

3. Dressing for the room instead of the session. The room is cold and you will not be, ten minutes in. Dress to be slightly cool on arrival with a layer you remove, rather than warm on arrival with nothing to take off.

4. Not bringing a dry top. The walk to the car in a damp top is where people actually get cold, not the gym floor. One spare top solves it entirely.

5. Skipping or rushing the warm-up because you are cold. This is backwards - a cold room means the warm-up matters more, not less. Keep the layer on and take the extra few minutes, particularly in autumn and winter.

A sixth worth knowing: the free weight area is usually the coldest part of a gym and the studios are usually the warmest. If you are moving between them, expect the change rather than being surprised by it.

FAQ: Cold Gym Outfit Questions, Answered

Why is the gym so cold when everyone else seems fine?

They are further into their session and generating more heat. As a newer member you spend more time between sets and often work at a lower intensity, so the same room genuinely feels colder to you. It changes within a few weeks.

Should I wear shorts or leggings?

Full-length leggings for the first few sessions at least. Legs get cold quickly in air-conditioned rooms, particularly during rest periods, and leggings stay comfortable across the whole session rather than only the warm part.

Can I keep my jacket on the whole time?

You can, and most people find they overheat by the middle of the session. A full-zip lets you open it progressively rather than choosing between on and off, which is why it beats a pullover for this.

What is the one thing worth buying?

A full-zip mid layer, or a non-cotton base layer if you already have a zip. Between those two, the base layer matters more for how cold you feel afterwards and the zip matters more during.

Why do I get cold after the workout rather than during?

Damp fabric plus a cool room plus no heat production. Changing out of the damp base layer before leaving fixes almost all of it, and putting a warm layer back on immediately after your last set helps too.

TL;DR:

• Gyms sit around 18-20C because it is set for people already training, not people who just walked in
• Newer members feel it more because of longer rests and lower intensity - it genuinely is colder for you
• Three layers: non-cotton base, full-zip mid, full-length leggings
• The zip is the point - it gives you a middle setting instead of on-or-off
• Keep the layer on through the warm-up, and put it back on immediately after your last set
• Bring a dry top; the walk home in a damp one is where people actually get cold

Dress to be slightly cool on arrival with something to take off. Everything else follows from that.

See It in Motion

Seen here: High Waist 8” Yoga Shorts — shop similar styles on bubblelime.com