Walking into a gym in a plush running shoe is one of the most common mistakes people make with their footwear — and it’s a fair question to ask before buying: are On Cloud shoes actually built for training, or just for the road? The short answer is it depends on the model. The Cloud X is the one built specifically with gym work in mind.
Why On Running Shoes and Gym Shoes Aren’t the Same Thing
on running shoes are built around forward motion — cushioning that absorbs a repeated, single-direction impact as you push off with each stride. A gym session asks something different. Lifting, lateral movement, box jumps, and quick direction changes need a flatter, more grounded base underfoot, rather than a tall stack of foam that can feel unsteady the moment you’re not simply running in a straight line.
The Cloud X: On’s Training-Specific Model
The Cloud X sits lower to the ground than distance-focused models like the Cloud Monster, using the same CloudTec® cushioning system as the rest of the range, but tuned for a firmer, more grounded feel. That lower stack height is what makes the real difference for gym use — your foot has less distance to travel before feeling stable ground contact, which matters when you’re under load or changing direction quickly.
Distance-running models sit at the opposite end of that spectrum on purpose. The Cloud Monster, for example, is built with a taller, softer stack specifically to absorb impact over long, straight-line miles — a strength for running, but not what you want underfoot during a heavy lift.
What to Use Each Model For
| Activity | Best Suited Model | Why |
|---|---|---|
| Weightlifting, strength training | Cloud X | Lower stack height for solid footing under load |
| HIIT, circuit training, agility work | Cloud X | Built for lateral movement, not just forward motion |
| Treadmill running as part of a gym session | Cloudsurfer | Balanced cushioning suited to running specifically |
| General cardio, classes, mixed sessions | Cloud X or Cloudsurfer | Both offer a versatile fit across varied activity |
| Heavy squats or deadlifts specifically | Consider a flat-soled lifting shoe | Maximum ground contact matters more than cushioning here |
A Note on Heavy Lifting
It’s worth being upfront: for very heavy, technical lifts like max-effort squats or deadlifts, dedicated flat-soled lifting shoes will usually outperform any cushioned trainer, On Cloud included. The Cloud X handles general strength training, circuits, and mixed sessions well, but if your training is built specifically around heavy barbell work, that’s a different category of footwear entirely.
What About Treadmill Sessions?
If your gym routine includes treadmill running alongside strength work, the Cloud X isn’t the right pick for that part of your session — its lower, firmer build is tuned for stability, not distance comfort. For the running portion specifically, the Cloudsurfer is a better match, offering the balanced cushioning built for running rather than lifting. Many gym-goers end up owning both: Cloud X for the floor, Cloudsurfer for the treadmill.
Sizing for Training Shoes
The Cloud X runs true to standard UK sizing, similar to the rest of the range. Since training sessions involve shorter, higher-intensity movement rather than long-distance miles, a slightly snugger fit is usually preferable for better lockdown during quick direction changes. If other On Cloud models have felt tight through the forefoot, it’s worth checking our wide fit range as well.
Still Deciding?
If you’re not sure whether the Cloud X suits your training style, get in touch through our contact page and we’ll help point you in the right direction before you order.
Shop the Cloud X
Ready to find your training shoe? Browse the full Cloud X collection below.
Frequently Asked Questions
Are On Cloud shoes good for the gym?
Yes, specifically the Cloud X, built lower to the ground with a stable base suited to training, lifting, and lateral movement.
Can I use running-focused models like the Cloud Monster for gym workouts?
It’s not ideal. The taller, softer cushioning built for running can feel unstable during lifting or quick directional changes, where a lower, firmer base works better.
Are On Cloud shoes suitable for heavy lifting?
For general strength training and circuits, the Cloud X performs well. For maximal squats or deadlifts specifically, a dedicated flat-soled lifting shoe is usually a better choice.
Does the Cloud X run true to size?
Yes, it fits true to standard UK sizing. A slightly snugger fit is often preferred for training to help with lockdown during fast movements.
