Commercial Cardio Equipment: Treadmill vs Bike vs Rower vs Ski Erg — How to Balance Your Floor

Choosing the right mix of cardio equipment is one of the most critical decisions you'll make when fitting out a commercial gym. Get it right and members stay engaged, classes fill up, and your floor looks premium. Get it wrong and you end up with rows of underused machines gathering dust while members queue for the treadmills.

This guide breaks down the four most popular commercial cardio options — treadmills, exercise bikes, rowing machines, and ski ergs — and helps you decide how to balance your floor for maximum member satisfaction and return on investment.

Why Cardio Equipment Mix Matters

No two members train the same way. Some want steady-state cardio; others want high-intensity intervals. Some have knee issues that rule out running; others find rowing machines intimidating. A well-balanced cardio floor caters to all of these preferences while also serving your commercial interests — more equipment variety means fewer reasons for members to cancel.

Beyond member experience, your cardio mix affects:

• Floor space utilisation — different machines have very different footprints
• Maintenance budget — motorised treadmills require more servicing than non-motorised equipment
• Energy consumption — treadmills and motorised bikes draw significant power
• Noise levels — rowing machines and ski ergs are louder under load
• Member retention — variety reduces boredom and keeps members coming back

Treadmills: The Anchor of Any Cardio Floor

Treadmills are the most recognised and most demanded piece of cardio equipment in any commercial gym. They're accessible to virtually all fitness levels, replicate a natural movement pattern, and support everything from walking rehabilitation to sprint intervals.

Pros

• Universal appeal — suits beginners through to elite athletes
• High hourly usage rates (members tend to use treadmills for 20–45 minutes per session)
• Strong perceived value — members notice when treadmills are absent
• Wide speed and incline range for varied programming

Cons

• Largest footprint of any cardio machine (~0.7–0.9m² per unit)
• Higher maintenance cost due to motor, belt, and deck wear
• Higher energy consumption
• Not suitable for members with certain knee or hip conditions

How Many to Buy?

A common industry benchmark is one treadmill per 40–50 active members. For a mid-size gym with 300 active members, that's roughly 6–8 treadmills. If your gym runs peak-hour classes or is open 24 hours, skew higher.

Explore our commercial cardio equipment range including treadmills from leading brands.

Exercise Bikes: High Usage, Low Maintenance

Upright bikes, recumbent bikes, and spin (indoor cycling) bikes each serve slightly different demographics, but all share one key advantage: they're low-impact and extremely reliable.

Upright and Recumbent Bikes

These are staples of the general cardio floor. Recumbent bikes in particular attract older members and those in rehabilitation, making them valuable for gym demographics that skew 35+. They're also extremely low maintenance — fewer moving parts means less to go wrong.

Spin Bikes

If you run group cycling classes, spin bikes are essential. They're compact, durable, and used intensively. Even if you don't run dedicated spin classes, a cluster of spin bikes on the open floor can serve members who prefer that riding position.

Pros

• Very low impact — suitable for injured, elderly, and deconditioned members
• Lower maintenance than treadmills
• Compact footprint, especially spin bikes
• Quiet operation (magnetic resistance models)

Cons

• Lower perceived status than treadmills in some demographics
• Seated position less functional for some training goals

Rowing Machines: Full-Body Power and Growing Popularity

Commercial rowing machines have surged in popularity over the past five years, driven by the HYROX movement, CrossFit, and a broader shift toward full-body conditioning. A rowing machine engages approximately 86% of the body's muscles and delivers an exceptional cardiovascular and strength endurance stimulus in a low-impact format.

Pros

• Full-body conditioning in a single machine
• Low impact — suitable for most injury profiles
• Excellent for HIIT and endurance programming
• Very durable with minimal maintenance (air resistance models especially)
• Small footprint per unit when stored vertically

Cons

• Technique-dependent — poor form leads to lower back injury and member frustration
• Louder than bikes or treadmills under hard effort
• Requires more floor space in use (roughly 2m x 0.6m per machine)
• Not suitable as a primary cardio option for deconditioned or elderly members without coaching

Placement Tip

Position rowing machines away from your main traffic aisles. They're often used in short, high-intensity blocks — you don't want members weaving around rowers mid-sprint. A dedicated functional zone works well alongside functional training equipment.

Ski Ergs: The Conditioning Specialist

The ski erg is the newest mainstream addition to the commercial cardio floor. Originally developed for cross-country skiers, it's now a staple in high-performance gyms, CrossFit boxes, and HYROX training facilities. It delivers an intense upper-body and core conditioning stimulus that no other machine replicates.

Pros

• Unique upper-body dominant conditioning — stands apart from all other cardio
• Extremely small footprint (wall-mounted options available)
• No motor or belt — essentially zero maintenance
• Excellent for HIIT programming and timed intervals
• Popular with performance-focused members and athletes

Cons

• Niche appeal — not suited to all member demographics
• Technique-dependent; less intuitive than a treadmill or bike
• Loud under hard effort
• Lower usage rate if your member base is not performance-focused

Recommended Cardio Floor Mix by Gym Type

General Commercial Gym (300–500 members)

• 8–10 treadmills
• 4–6 upright/recumbent bikes
• 4 rowing machines
• 2 ski ergs

Boutique Functional Fitness Studio

• 4 treadmills (or assault treadmills)
• 4 rowing machines
• 4 ski ergs
• 4–6 assault bikes

Hotel or Corporate Gym

• 3–4 treadmills
• 2–3 upright bikes
• 1–2 rowing machines
• Optional: 1 ski erg

Rehab or Allied Health Facility

• 2–4 treadmills
• 4–6 recumbent bikes
• 2 rowing machines (with coaching resources)

Floor Space Planning Tips

Good flooring is critical under and around cardio equipment. Rubber matting reduces noise, protects floors, and improves member safety. See our gym flooring range for commercial-grade options.

Frequently Asked Questions

How many treadmills do I need for a 500-member gym?

A general benchmark is one treadmill per 40–50 active members. For 500 members, aim for 8–10 treadmills minimum, with additional bikes and rowers to handle peak demand.

Are rowing machines worth buying for a general gym?

Yes — particularly as the HYROX and functional fitness trend continues to grow. Even in a general gym, 3–4 rowers add significant variety and appeal to a growing demographic of performance-minded members.

Should I buy ski ergs or assault bikes?

Both, ideally — but if you're choosing one, assault bikes typically have broader appeal. Ski ergs are more niche but serve an important conditioning role. For HYROX-focused facilities, both are essential.

How do I prevent cardio equipment from dominating my floor plan?

Zone your cardio equipment together along one or two walls. This keeps the floor plan clean, manages noise, and prevents cardio from cannibalising your strength training area.

What's the biggest mistake gym owners make with cardio equipment?

Buying too many treadmills and not enough variety. Balance is key — a diverse cardio floor signals a quality gym.

Ready to Plan Your Cardio Floor?

Whether you're fitting out a new facility or refreshing an existing floor, Compound Fitness Equipment can help you select the right cardio mix for your member base, budget, and space.

Browse our cardio equipment range or contact our team to discuss your fitout requirements.