Cardio machines do two jobs at your gym. They give members a heart-rate workout that doesn't depend on weather or daylight. And they earn back the floor space they take up by driving member retention, peak-hour utilization, and class programming.
This guide covers 15 cardio machine types every gym should consider, what each one costs, where each fits by gym size and type, and how to think about the mix as an operator—not a shopper.
Here's an overview of the 15 cardio machine types that we'll be covering:
- Treadmill
- Elliptical trainer
- Stair climber/stepmill
- Stationary bike
- Recumbent bike
- Spin bike
- Airdyne bike
- Air bike
- Rowing machine
- VersaClimber
- Jacob's Ladder
- Ski ergometer
- Stepper machine
- Arm ergometer
- Curve treadmill
For the rest of the article, we'll unpack why each one is essential and the pros and cons from both business and member-experience perspectives.
Cardio Equipment Cost Comparison
How to Choose Cardio for Your Gym
Most cardio guides hand you a product list. That's the easy part. The harder questions—how many to buy, where to put them, and which ones earn back their floor space—rarely get answered.
Here's how operators we work with actually think about it.
Member-per-machine ratio
The industry baseline is one cardio station per ten active members during peak hours.
A gym with 300 members typically wants 25–35 cardio machines distributed across types. Below 1:10 and you'll see queueing complaints; well above 1:10 and you're paying rent on machines that gather dust.
Floor space per machine
Plan roughly 50 square feet per cardio machine, including walking lanes and access.
Treadmills want 5 feet of clearance behind them for safety. Spin bikes can pack tighter (3-foot center-to-center) because the rider is stationary. A 1,500 sq ft cardio area realistically fits 25–30 machines if you're disciplined about layout.
Recommended mix by category
For a general-purpose gym, a defensible starting mix looks like this:
- 60–70% treadmills: the highest-utilization category in almost every gym type
- 20–30% elliptical / cross-trainer: joint-friendly default for older members and rehab
- 5–10% bikes (spin, recumbent, upright): class programming and low-impact alternative
- 2–5% rowers, climbers, ergs: variety and HIIT programming
If you run a specialty gym, this mix will look very different—covered in the next section.
ROI math that actually works
A commercial treadmill at $5,000 should pay itself back in 24–36 months through three line items: avoided premature replacement (commercial frames last 10+ years vs. 3–5 for prosumer), reduced downtime (less revenue lost to "out of service" tape), and retention lift from members who don't switch gyms because the cardio works.
The cleanest formula:
Payback months = Machine cost ÷ (monthly retention lift in dollars + monthly downtime savings)
If a $5,000 machine prevents two members per month from churning at $80/month, that's $160/month in retained revenue—a 31-month payback before you account for downtime savings.
Cardio Mix by Gym Type
A martial arts academy doesn't need 12 treadmills. A 24-hour access gym does. The mix that works is a function of gym type, member behavior, and class programming—not a generic "must-have" list.
- Big-box / commercial gyms (24-Hour Fitness, LA Fitness, independent multipurpose): Heavy treadmill density (60–70% of cardio floor), full elliptical row, recumbent bikes for older members, 4–6 spin bikes for a small group room. Total cardio area usually 25–40% of total floor space.
- 24/7 access gyms (Anytime Fitness, Snap Fitness, independent access models): Treadmills + ellipticals dominate because there's no instructor presence. Skip equipment with high learning curves (Jacob's Ladder, VersaClimber) and skip equipment that requires supervision. Aim for the highest possible per-machine utilization.
- Boutique HIIT / CrossFit boxes: Air bikes, ski ergs, and rowers do the heavy lifting. Two assault bikes, two SkiErgs, and 4–6 rowers covers most workouts. Treadmills are optional. If you have curve treadmills, you're probably running 1–2, not a row.
- Martial arts academies: 1–2 rowers, 1 air bike, maybe a heavy bag-rotation cardio station. Members aren't there for cardio machines—they're there for the training. Cardio is a warm-up tool, not a profit center.
- Yoga / Pilates / functional studios: Skip traditional cardio almost entirely. A single rower or recumbent bike can serve members with special-population needs. Floor space goes to mats, reformers, or open training area instead.
Connected Cardio in 2026
The cardio category has changed more in the last three years than in the previous fifteen.
Connected cardio—machines that pair with member apps, sync workouts to a profile, and feed data back to your gym software—is now a baseline expectation in commercial-grade equipment, not a premium feature.
What this looks like in practice:
- Bluetooth + ANT+ in nearly every commercial treadmill, bike, and rower at $2,000+
- App integrations with Apple Health, Strava, Peloton, EGYM, and other platforms
- Member-profile sync when paired with gym management software—the workout shows up in their member record, not just on the machine console
The retention case is straightforward.
Members who track their cardio sessions in a connected ecosystem show up more often. The data lives somewhere they can see it, which makes the workout feel like progress rather than a one-off session. For operators, this means cardio equipment isn't just hardware anymore—it's a member-engagement surface.
What Is Cardio Equipment?
Cardio equipment is any fitness machine designed to raise heart rate and work large muscle groups—treadmills, rowing machines, stationary bikes, ellipticals, climbers. These machines improve cardiovascular health, build endurance, and burn calories.
Regular use strengthens the heart, improves lung function, and supports weight management. Cardio equipment suits all fitness levels and can be modified for specific goals or physical limitations.
The 15 Cardio Machines, One by One
Each machine below gets the same treatment: what it does, who it's for, where it fits in a gym, and what it costs commercial vs. home.
1. Treadmill
A treadmill lets you walk, jog, or run indoors on a moving conveyor belt. You can adjust speed and incline to simulate different terrains, and most models include safety rails and emergency stop buttons.
- Weather-proof cardio: Members get consistent workouts year-round
- Adjustable intensity: Speed and incline settings suit beginners through advanced runners
- Joint-friendly options: Cushioned surfaces reduce impact compared to outdoor pavement
- Easy to use: Minimal learning curve for members of all fitness levels
Commercial-grade treadmills cost $2,000–$8,000. Home models run $500–$3,000. You'll find treadmills in nearly every gym—they're the most common cardio machine for a reason.
2. Elliptical trainer
An elliptical trainer is a stationary machine that provides a low-impact cardiovascular workout. It combines walking, running, and stair climbing into one fluid motion. The pedals move in an oval pattern, replicating leg movements without the jarring impact. Handles also engage your upper body.
- Low impact: Easier on joints than running or jumping
- Full-body engagement: Moving handles work arms while pedals work legs
- Adjustable resistance: Users can target different muscle groups and intensity levels
- Beginner-friendly: Simple mechanics suit all fitness levels
Commercial ellipticals cost $1,000–$5,000. Home models run $300–$2,000. Ellipticals are widely available in gyms and fitness facilities.
3. Stair climber/stepmill
A stair climber, or stepmill, mimics climbing stairs using a rotating staircase with continuously moving steps. Users can adjust speed and intensity, and many models include railings for stability.
- Low impact: Less joint strain than running, suitable for those with sensitivities
- Intense cardio: Quickly elevates heart rate for HIIT or steady-state workouts
- Lower body focus: Targets glutes, quads, hamstrings, and calves effectively
Commercial stepmills cost $3,000–$8,000. Home models run $1,000–$4,000. Most large commercial gyms have at least one stair climber. Smaller gyms may skip them due to the higher price tag.
4. Stationary bike
A stationary bike replicates cycling while staying in one place. They come in upright, recumbent, and spin variations.
- Low impact: Reduces joint stress, ideal for rehab or sensitive knees
- Adjustable resistance: Works for HIIT or steady-state cardio
- Space efficient: Takes up less floor space than treadmills
- Versatile: Multiple styles suit different member preferences
Commercial stationary bikes cost $500–$2,500. Home models run $100–$1,500. Stationary bikes are standard equipment in almost all gyms and fitness facilities.
5. Recumbent bike
A recumbent bike features a reclined seating position with a larger seat and backrest. You sit back with your legs in a horizontal position, pedaling in front of your torso rather than beneath you.
- Comfortable positioning: Reclined posture reduces back strain
- Low impact: Gentle on joints, great for rehab or older members
- Accessible: Easier to mount and dismount than upright bikes
Commercial recumbent bikes cost $1,000–$4,000. Home models run $200–$1,500. You'll find recumbent bikes in most commercial gyms. Smaller or strength-focused gyms may not carry them.
6. Spin bike
A spin bike is a specialized stationary cycle designed to mimic outdoor cycling. It features a heavy flywheel, adjustable resistance, and handlebars that allow various riding positions.
- Group class ready: Built for high-energy spinning classes
- Intense cardio: Simulates hill climbs and sprints with resistance adjustments
- Durable construction: Handles standing climbs and aggressive riding
Commercial spin bikes cost $500–$2,000. Home models run $200–$1,500. Spin bikes are widely available, especially in gyms offering group cycling classes.
7. Airdyne bike
An Airdyne bike uses air resistance generated by a large front fan. Your pedaling and arm movements power the fan—the faster you go, the harder it gets.
- Full-body workout: Arms and legs work simultaneously
- Self-regulating intensity: Resistance automatically matches your effort
- Simple mechanics: Fewer parts to maintain or break
Commercial Airdyne bikes cost $800–$2,500. Home models run $200–$1,000. Airdyne bikes appear in many gyms, though computerized magnetic bikes are becoming more common.
8. Air bike
An air bike (also called a fan bike) works similarly to an Airdyne—a large front fan creates resistance based on how hard you push. The faster you pedal and move the handles, the more resistance you'll feel.
- Total body engagement: Works upper and lower body at once
- Low impact: Appropriate for joint issues or injury recovery
- High calorie burn: Excellent for weight management goals
- HIIT-friendly: Perfect for interval training protocols
Commercial air bikes cost $500–$2,000. Home models run $200–$800. Air bikes are popular in gyms emphasizing functional fitness, HIIT, and CrossFit exercises.
9. Rowing machine
A rowing machine simulates rowing a boat. You sit on a sliding seat, strap your feet in, and pull a handle connected to a flywheel or resistance mechanism. The motion works your legs, core, and arms simultaneously.
- Full-body workout: Engages multiple muscle groups in one movement
- High calorie burn: Effective for weight management
- Low impact: Gentle on joints while still challenging
- Versatile training: Works for steady-state cardio or HIIT
Commercial rowing machines cost $800–$2,500. Home models run $300–$1,500. Resistance types include magnetic, water, air, and hydraulic. Most commercial gyms have at least one rowing machine.
10. VersaClimber
The VersaClimber imitates climbing by engaging your arms and legs at the same time. You stand upright on foot pedals, grip the handles, and move your limbs in an alternating climbing motion. Resistance settings let you control workout intensity.
- Full-body engagement: Works legs, core, back, and arms
- Intense cardio: Quickly elevates heart rate
- Versatile programming: Suits steady-state, intervals, or HIIT
Commercial VersaClimbers cost $2,000–$5,000. Home models run $1,000–$3,000. The VersaClimber is specialized training equipment more commonly found in CrossFit and HIIT-focused gyms.
11. Jacob's Ladder
Jacob's Ladder is a self-paced climbing machine with rotating rungs attached to a continuous chain. The faster you climb, the faster the rungs move—so you control the intensity entirely through effort.
- Full-body workout: Engages legs, core, back, and upper body
- Low impact: Reduces joint stress while delivering intensity
- Self-paced: No buttons or settings—just climb
- HIIT-ready: Quickly spikes heart rate for interval training
Commercial Jacob's Ladder machines cost $4,000–$8,000. This premium equipment isn't as common as treadmills or ellipticals, but gyms emphasizing HIIT or functional fitness use them to offer challenging workout options.
12. Ski ergometer
A ski ergometer (ski erg) mimics the upper body movements of cross-country skiing. You stand or sit while pushing and pulling handles in a rhythmic skiing motion.
- Full-body engagement: Works arms, shoulders, back, core, and legs
- Low impact: Gentle on joints, suitable for various fitness levels
- Versatile training: Works for endurance or HIIT programming
Commercial ski ergometers cost up to $4,000. Home models run $500–$1,500. While less widespread than other equipment, ski ergs are a growing trend at gyms focused on functional fitness and HIIT.
13. Stepper machine
A stepper machine simulates climbing stairs with two pedals that move up and down. Some models include handles for stability and upper-body engagement. Adjustable resistance levels let users control difficulty.
- Low impact: Less joint stress than running or jumping
- Lower body focus: Targets quads, hamstrings, glutes, and calves
- Compact footprint: Takes up less space than treadmills or ellipticals
- Accessible: Works for members of all fitness levels
Commercial stepper machines cost $1,000–$3,000. Home models run $100–$500. Stepper machines are fairly common in gyms and fitness facilities, though not every location carries them.
14. Arm ergometer
An arm ergometer (also called an arm bike or upper body ergometer) focuses on upper body muscles. Instead of pedaling with your feet, you move handles in a circular or linear motion with your arms.
- Upper body focus: Targets arms, shoulders, chest, and back
- Accessibility: Allows cardio for those with lower body limitations
- Rehabilitation use: Common in physical therapy settings
- Seated or standing: Multiple positioning options available
Commercial arm ergometers cost $800–$2,500. Home models run $200–$1,000. Arm ergometers are less common in general gyms—they're specialized equipment typically found in rehabilitation facilities or gyms serving members with mobility limitations.
15. Curve treadmill
A curve treadmill has a curved, slatted surface instead of a motorized belt. Your pace controls your speed—no electricity required.
- Human-powered: No motors means lower energy costs and eco-friendly appeal
- Higher effort: The curved surface engages more muscles, especially core and hamstrings
- Safer deceleration: No set max speed—just slow your pace to stop gradually
Commercial models cost $3,000–$8,000; home versions run $1,000–$3,000. Curve treadmills are still specialized equipment, so not every gym carries them. You're more likely to find them at facilities emphasizing natural movement patterns or functional training.
Maintenance and Lifespan
Commercial cardio equipment isn't a one-time purchase—it's a depreciating asset with a maintenance schedule. A commercial treadmill typically lasts 10+ years with proper care; commercial bikes 7–10; rowers 8–10. Skip the maintenance and you'll cut those numbers in half.
A working baseline:
- Weekly: Wipe-downs, console cleaning, belt inspection
- Monthly: Belt tension check, lubrication on treadmills, electronics check
- Quarterly: Deep clean, motor inspection, deck flip on treadmills
- Annually: Professional service for high-use commercial machines
For a fuller breakdown, see our guide on cleaning your gym facility and equipment.
Match Your Cardio Mix to the Gym You Actually Run
Most cardio guides treat your gym like a list of products to buy. The harder questions are how many of each, where to put them, and whether the mix matches the kind of gym you actually run.
A 24-hour access gym wants treadmill density. A martial arts academy wants two rowers and an air bike. A boutique HIIT studio wants assault bikes and SkiErgs and almost no treadmills at all. The best cardio mix is the one that fits your member base, your peak-hour load, and your floor plan—not a generic top-15 list.
If you're replacing or expanding equipment in 2026, two things matter more than they used to: connectivity (does the machine talk to your member software?) and lifespan economics (does it pay back the floor space within 24–36 months?). Get those right and the rest of the mix takes care of itself.
If you're rethinking your floor plan, member software, or both, Gymdesk is built to make the connected-cardio side of that equation work alongside the rest of your operations.
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FAQ
Cardio Machines FAQs
Sean has spent the last decade creating content that helps businesses—small and not so small—grow smarter to allow operators to do more of what they love. You know, the fun stuff.
From shipping and international logistics to web development and marketing, he's done the work (not just the words) to scale retail and service businesses efficiently.
You can find his work at Sendle, Shogun, The Retail Exec, Gymdesk, and more.
