Quick answer: For leg day, pick loose bodybuilding pants with room through the quads and glutes, an elasticated or drawstring waist, and a breathable fabric such as a ribbed knit or poly waffle. Go wide-leg with closed ankles if you want the classic old-school look without fabric catching under your shoes. Go straight-leg if you want maximum airflow.
Bodybuilding pants (or trousers, if you're British about it) are the most underrated part of a training wardrobe. Skinny joggers that look fine at the shops pinch the moment you hit the bottom of a squat. Here's how to choose properly.
What are the best loose-fit bodybuilding trousers for leg day in the UK?
The best leg-day trousers do three jobs: they let you sit into a full-depth squat without pulling at the knee or crotch, they keep you cool, and they stay put without you re-tying a drawstring between sets.
- Ribbed Bodybuilding Pants: straight leg, relaxed through the upper leg, ribbed breathable fabric and an elastic waistband. Sizes M to 3XL in Midnight Black, Steel Grey, Steel Blue and Maroon.
- Bodybuilding Pants: the old-school wide-leg cut in a 300gsm poly waffle (95% polyester, 5% spandex), closed at the feet with a drawstring. Sizes XS to 4XL.
- HELLFIRE Straight Leg Sweats: a heavier 360gsm cotton-poly fleece with a baggy straight leg, for colder sessions and everyday wear.
Ribbed Bodybuilding Pants: oversized where it matters, structured where it counts.
See everything in the pants collection.
Which gym trousers have wide legs but stay secure around the ankles?
This is the classic golden-era bodybuilding pant: a big, wide leg that gathers at the ankle. The closed ankle matters in the gym for practical reasons:
- Fabric doesn't drag under your heel on squats, lunges or the leg press.
- It won't catch on bench feet, plate trees or the hack squat platform.
- The volume stays in the thigh, which exaggerates leg size, and the narrow ankle sharpens the silhouette.
Our Bodybuilding Pants use exactly this cut, with an adjustable drawstring at the foot so you can set how tightly they gather. They also come in Black & White and Black & Grey.
Straight-leg bodybuilding trousers vs tapered gym joggers for lifting
| Straight-leg / wide-leg | Tapered joggers | |
|---|---|---|
| Squat depth | Lots of room at the knee and thigh, nothing pulls | Can pinch at the knee if cut slim |
| Airflow | High, because air moves up the open leg | Lower, because the cuff traps heat |
| Look on big legs | Drapes and adds size, with a retro feel | Can look stretched over big quads |
| Everyday wear | Streetwear-friendly baggy fit | Neat and sporty |
| Best for | Leg day, heavy compounds, big lower bodies | Cardio, conditioning, slimmer builds |
If you carry serious size through the quads and glutes, straight or wide legs nearly always win. Tapered joggers are made for an average leg, not a bodybuilder's.
What breathable gym trousers work well for heavy training and everyday wear?
Breathability comes from the fabric and the cut together:
- Ribbed knits have raised channels that keep fabric off the skin, so less of it is touching you.
- Poly waffle is quick-drying and textured, and a little spandex adds stretch for deep squats.
- Cotton-poly fleece (around 360gsm) is warmer and better for winter, warm-ups and lifestyle wear than for a sweaty August leg day.
For one pair that does both, the Ribbed Bodybuilding Pants are designed for training, lifestyle wear and off-season size. They pair well with an oversized pump cover tee.
Where can I find bodybuilding trousers in extended sizes in the UK?
Most high-street gym trousers stop at XL or 2XL, and their "XL" is often cut for a runner, not a 110kg lifter. Things to check:
- The hip and thigh measurement, not just the waist. The size chart for our Bodybuilding Pants goes up to a 180cm hip measurement in 4XL.
- An elasticated or drawstring waist, which adjusts as you bulk or cut.
- Model reference. On our HELLFIRE sweats, the model is 6'2", 120kg and wears a 2XL, which gives you a real-world comparison.
We stock bodybuilding pants up to 4XL, and our ribbed pants up to 3XL.
HELLFIRE Straight Leg Sweats: 360gsm, baggy straight leg.
FAQ
Are bodybuilding pants and bodybuilding trousers the same thing?
Yes. "Pants" is the American term and "trousers" the British one. In gym wear both mean loose, full-length training bottoms.
Why do old-school bodybuilders wear baggy pants?
They give free movement for heavy leg work, keep the legs warm between sets and hide leg size until it's time to show it. The look became iconic in golden-era gyms in the 1970s and 80s.
Can I wear wide-leg gym trousers for deadlifts?
Yes. A closed or gathered ankle keeps the fabric tidy. Make sure the waistband is secure enough that you're not adjusting it between pulls.
Related guides: Best gym shorts for weight training · Building a golden era gym outfit · Size guide for muscular builds