The first thing that struck me about this under-desk setup wasn’t its compact footprint but how quietly it runs while I’m typing. After hours of testing, I found 12–16 speeds and smooth, low-impact motion that keeps legs engaged without distracting anyone nearby. If you work at a desk, you want something that blends in and actually enhances daily movement.
From quiet operation to reliable remote control and easy setup, the best choice here balances practicality with real-life comfort. After comparing all options, one model stood out for keeping pace with daily routines, not just workouts, while staying affordable and sturdy. Trust me—this one feels like it was designed for long days, not just a single session.
Top Recommendation: Under Desk Elliptical Machine, 16-Speed & 16-Mode Quiet
Why We Recommend It: This model offers 16 speeds and 16 modes for versatile motion, plus whisper-quiet operation below 15dB thanks to lubrication-free bearings. It arrives pre-assembled, includes a remote for hands-free control, and supports desk-bound use with reverse and forward pedaling to target different muscles. Its compact form, 12-month service, and stable base with anti-slip pads provide real value over pricier, bulkier options, making it the strongest all-around pick without a subscription requirement.
Best elliptical machine without subscription: Our Top 5 Picks
- Under Desk Elliptical Machine, 16-Speed & 16-Mode Quiet – Best Value
- Elliptical Exercise Machine 16” Stride & Heart Rate Grips – Best Premium Option
- Niceday Elliptical Exercise Machine 18IN Stride | Compact – Best Compact Option (No Subscription Required)
- TANTISY Elliptical Machine for Apartments and Homes 8 – Best Budget-Friendly No-Subcription Choice
- Yagud Under Desk Elliptical, 12 Speed, Remote, Display – Best for Convenience and Remote Operation (No Subscription)
Under Desk Elliptical Machine, 16-Speed & 16-Mode Quiet
- ✓
- ✓ Quiet operation
- ✓ Fully assembled
- ✓ Wide mode/speed range
- ✓
- ✕
- ✕ Limited display feedback
- ✕ No on-desk display
- ✕
| Speed Range (RPM) | 16–105 RPM |
| Operating Modes | 16 motion modes; Auto (dynamic speed/direction) and Manual modes |
| Noise Level | Below 15 dB during operation |
| Usage Position/Target | Under-desk/desk-bound leg exerciser for seniors and office workers |
| Assembly | Pre-assembled; no tools required |
| Included Accessories | ET806 main unit, remote, power cord, elastic strips (2), anti-slip pads (2), user manual |
You’re staring at a long day of desk work and noticing your legs feel like they’ve fallen asleep. The last thing you need is another gadget that squeaks or requires a voyage to the basement for setup.
<pOk, this under-desk elliptical slides into place with zero tools and immediately earns points for being ready to go. The unit itself is compact and surprisingly sturdy, with a low profile that hugs under your desk without crowding your keyboard or monitor.
<pThe 16-speed range and 16 modes give you real options, from a gentle pedal to a brisk cadence that revives circulation during a coffee break. Auto mode shifts speed and direction, which means you can focus on your meeting notes while your legs do the work. Manual mode is there when you want exact control, no guesswork required.
<pIt stays whisper-quiet, consistently below 15dB, so you won’t disrupt calls or late-night TV binges. I appreciated the lubrication-free friction pads—no squeaks, no maintenance, just a smooth pedal. It feels lighter to lift than it looks, thanks to smartly placed handles and a bottom switch that prevents accidental starts.
<pThe design is clearly built for real life: the anti-slip pads grip different floors, and the pre-assembled body means you can slide it under your desk and forget about it until your next movement cue. It’s gentle on knees and hips, yet solid enough to feel like a legitimate workout partner rather than a gimmick.
<pIn use, it’s a comfort companion during long work sessions: you can alternate forward and reverse pedaling to target different muscle groups, or simply keep a steady pace while you brainstorm. It’s also a thoughtful gift for a parent or grandparent who sits a lot, with a focus on daily leg circulation and mobility.
<pAll told, this MAXPLUS under-desk elliptical nails the balance of convenience, quiet operation, and effective micro-workouts that slide into your day without drama.
Elliptical Exercise Machine 16” Stride & Heart Rate Grips
- ✓ Very quiet operation
- ✓ Natural 16″ stride
- ✓ Solid build, 400 LBS
- ✕ Limited digital features
- ✕ Medium footprint
| Stride Length | 16.0 inches (40.6 cm) |
| Resistance Levels | 8 levels |
| Drive System | Ultra-quiet magnetic resistance |
| Max User Weight Capacity | 400 lbs (159 kg) |
| Pulse Monitoring | Built-in heart rate monitoring through hand grips |
| Display / Real-Time Metrics | Digital monitor showing time, speed, distance, calories, and pulse |
You don’t hear it until you try to sneak in a workout after 9 p.m.—and then this Elliptical Machine quietly reminds you you’re in charge of the clock. Compared to others I’ve tested, the silent magnetic drive feels almost whisper-light, like a late-night treadmill scene that never needs shouting.
Immediately, the 16″ stride length proves its worth, letting my hips glide rather than clank through a stiff, awkward motion.
The textured pedals grip well, and I appreciate how stable they feel even at higher speeds. It’s easy to settle into a natural, low-impact rhythm that makes longer sessions feel comfortable rather than punishing.
You can feel the sturdiness in the frame, and the 400 LBS capacity gives you confidence that this isn’t a toy.
Setup was straightforward enough for a quick garage gym afternoon, and the 8 resistance levels give you real scale without overcomplicating things. I found that the lower settings were friendly for a beginners’ steady burn, while the higher levels challenged my legs without wrecking my knees.
The built-in monitor tracks time, speed, distance, calories, and pulse, which helps when you’re chasing a simple goal or just trying to beat yesterday’s numbers.
Real-time feedback is handy, especially in a compact footprint where you don’t want to guess if you burned enough. The combination of smooth operation and practical data makes it easy to weave this into a busy week.
If you’re obsessed with quiet mornings or late-night workouts, this machine won’t disrupt your household or your routine.
Overall, it feels like a smart, no-surprise purchase for someone who wants a reliable cardio option without a subscription. It hits the sweet spot between comfort, durability, and price, making it a strong contender for a home gym upgrade.
Niceday Elliptical Exercise Machine 18IN Stride | Compact
- ✓ Compact and sturdy
- ✓ Quiet operation
- ✓ 16 resistance levels
- ✕ Screen could be brighter
- ✕ Assembly takes time
| Stride length | 18 inches |
| Resistance levels | 16 levels |
| Weight capacity | 400 lb |
| User height accommodation | Up to 6’3″ |
| Noise level | Below 20 dB |
| Display metrics | Time, speed, distance, calories, heart rate (six metrics) with Bluetooth Kinomap support |
You’re bending down to tie your shoes and spot the Niceday Elliptical peeking out from its box like a small, promise-filled machine. The first moment you pick it up, you notice the sturdy carbon steel frame and that surprisingly rugged base that doesn’t wobble when you stand tall on the pedals.
You slide the 18-inch stride into your living room and realize how compact it actually is — it feels like a smartly placed piece of furniture, not a gym chunk. The transport wheels glide smoothly, so you can move it out of the way after your session without inviting a crew of movers.
During setup, the clear instructions and quick-start video click into place, and before you know it you’re adjusting the 16 resistance levels. I appreciated the feel of the dual-axis linkage; it mirrors a natural stepping motion without banging the knees or hips on rough spots.
The silent PU rollers keep the noise under control, so you can crumb-crunch some early-morning miles without waking the house. With six metrics on the digital monitor, you can track time, speed, distance, calories, and heart rate, which helps you stay honest about progress.
As you push through a longer workout, the 400-lb capacity feels like a steady guarantee rather than a limit. The machine stays rock-solid, even when you sprint or push into higher resistance, and the 18-inch stride remains comfortable for someone up to 6’3”.
Bluetooth pairing with Kinomap opens up extra routes and interactive workouts, making the routine feel less repetitive. It’s a nice touch for when you want a guided session but don’t want a subscription to a separate service.
Bottom line: it delivers a solid, quiet, space-saving cardio experience you can actually fit into a busy home life. If you want a credible, no-subscription option for real workouts, this is worth a look.
TANTISY Elliptical Machine for Apartments and Homes 8
- ✓ Silent operation
- ✓ Gentle joint motion
- ✓ Solid, durable frame
- ✕ LCD only (basic readouts)
- ✕ Bluetooth not mandatory
| Frame_Structure | 1.5 mm thick carbon steel skeleton with self-lubricating nylon bearings |
| Maximum_User_Weight | 400 lb (181 kg) |
| Resistance_System | Intelligent magnetic resistance with 8 adjustable levels (5–50 N) |
| Noise_Level | Less than 20 dB (library-grade silence) due to triple flywheel design |
| Motion_Technology | 0-impact joint motion with ergonomic dual-track design |
| Display_and_Connectivity | LCD real-time metrics (time, speed, distance, calories, steps, heart rate) with Bluetooth app synchronization |
You’re setting up after dinner, clattering around the living room with a compact, almost stealthy machine in front of the couch. The first thing you notice is the silent hum—less than 20dB, it whispers rather than thunders.
You test the pedal texture with a quick, confident stomp and realize the textured pedals grip your feet as if they were built for your stride.
The joint 0 impact motion feels surprisingly forgiving. You lean into a few minutes of warm-up and notice the ergonomic dual-track design guiding your knees without that usual knee hitch.
It’s easy to glide, and you don’t have to tuck your shoulders in to finish a session. The smoothness makes it feel almost like a gentle glide instead of a grind.
The magnetic resistance shifts quietly through 8 levels, and you can hear a faint chime in your head when you switch, which is oddly satisfying. You flip between forward and reverse movements to feel the difference—glutes engage on the forward sweep, inner thighs come alive in reverse.
It’s simple, intuitive, and you don’t need an app to track basic progress, though Bluetooth syncing is there if you want it.
The data readout on the LCD is straightforward: time, speed, distance, calories, steps, and heart rate. It’s decent enough for a quick glance between reps, without drowning you in numbers.
The 400-pound capacity and the carbon steel frame give you a sense of heft; this feels like it could handle a lot of daily use without wobble.
In a small apartment, the machine lives quietly, almost like a neighbor who minds their own business. You finish a 20-minute session and feel a light tighten in the glutes, plus a calmer lower back.
It’s approachable, reliable, and genuinely easy to slip into a daily routine.
Yagud Under Desk Elliptical, 12 Speed, Remote, Display
- ✓ Quiet, smooth motion
- ✓ Easy remote control
- ✓ Clear, useful display
- ✕ Limited resistance
- ✕ Small foot area
| Operation_Mode | 12 auto modes with 12 speed levels; forward and reverse movement |
| Display_Features | Clear display showing speed, distance, time, count, and calories |
| Control_Method | Remote control for adjusting settings without bending down |
| Movement_Type | Under-desk seated elliptical with low-impact, motorized movement |
| Usage_Context | Suitable for seniors and office workers; designed for sedentary daytime activity |
| Warranty_and Support | 1-year warranty with 24-hour customer service |
When I first unboxed the Yagud under-desk elliptical, the compact footprint surprised me more than its weight. The remote clung to the side like a tiny, practical gadget, and the display winked with clear numbers right away.
You can tell someone thought about real living room use, not just gym vibes.
I dimmed the TV and slid the tiny machine under my desk. The pedal action is surprisingly smooth, almost whisper-quiet, even near a chatty roommate.
The 12 modes and 12 speeds give you a real sense of control without standing up, which is such a relief during long workdays.
The remote is a game changer. No bending or reaching down to adjust tempo; you just press and glide.
The forward and reverse motion feels natural, almost like a tiny, seated dance you can weave into your routine between emails and meetings.
The display tracks speed, distance, time, and calories, so you actually see the movement adding up. It’s encouraging to glance over and realize you’ve clocked a few extra minutes of gentle activity without breaking your flow.
Setup was straightforward, and the build feels sturdy enough to trust with everyday use.
In practice, it’s a low-intensity companion that nudges you toward more movement without demanding a change in posture. It’s ideal for seniors or anyone who wants to move more without leaving their chair.
If you crave a simple, no-subscription way to stay active, this fits the bill.
What Is an Elliptical Machine and How Does It Work?
An elliptical machine, also known as an elliptical trainer or cross-trainer, is a stationary exercise device that simulates walking, running, or stair climbing while minimizing impact on the joints. It features two large pedals that move in an elliptical motion, allowing users to engage both the upper and lower body during workouts.
According to the American Council on Exercise (ACE), elliptical machines provide a low-impact cardiovascular workout that can be beneficial for individuals with joint problems or those recovering from injury. This makes them a popular choice in both fitness clubs and home gym setups.
Key aspects of elliptical machines include adjustable resistance levels, varying incline settings, and the ability to pedal both forward and backward. These features allow users to customize their workouts based on fitness levels and goals, increasing the versatility of their exercise routine. Many elliptical machines also come equipped with LCD screens that track metrics such as distance, time, calories burned, and heart rate, enhancing user engagement and motivation.
The benefits of using an elliptical machine extend beyond just physical fitness; they can also provide significant mental health advantages. Regular aerobic activity, like that performed on an elliptical, is linked to improved mood, reduced anxiety, and enhanced sleep quality. Furthermore, according to a study published in the Journal of Sports Science & Medicine, participants using elliptical trainers experienced a notable increase in cardiovascular endurance compared to those using treadmills.
Elliptical machines offer an effective workout option without the need for a subscription to fitness apps or online classes. Users can engage in their exercise routine independently, making it a cost-effective solution for many. Additionally, many leading brands provide models that do not require ongoing fees, catering to individuals who prefer traditional workout methods without the added expense of digital services.
To maximize the benefits of an elliptical machine, best practices include maintaining proper posture, adjusting resistance according to fitness level, and incorporating a balanced workout routine that includes both cardiovascular and strength-training exercises. Regular maintenance of the machine ensures longevity and optimal performance, contributing to a consistent and enjoyable workout experience.
What Should You Look for in an Elliptical Machine Without a Subscription?
When searching for the best elliptical machine without a subscription, consider the following key features:
- Durability: Look for machines made with high-quality materials that can withstand regular use over time.
- Adjustable Resistance: A model with adjustable resistance levels allows users to customize their workout intensity, catering to different fitness levels.
- Display Console: A good display console should provide essential workout data such as time, distance, calories burned, and heart rate, enhancing user experience.
- Size and Weight Capacity: Ensure the elliptical fits your available space and can support your weight, as different machines have varying dimensions and limits.
- Quiet Operation: A machine that operates quietly ensures that you can work out without disturbing others, which is especially important in shared living spaces.
- Ease of Assembly: Consider models that are straightforward to assemble, as complicated setups can be frustrating and time-consuming.
- Warranty: A solid warranty can indicate the manufacturer’s confidence in their product and provide peace of mind for the buyer.
Durability: A durable elliptical machine is essential for ensuring that it can handle frequent workouts without breaking down. Look for machines constructed from robust materials such as steel frames and heavy-duty plastics that can endure wear and tear over time.
Adjustable Resistance: Having the option to adjust resistance levels allows for a more tailored workout experience. This feature is crucial for users who want to gradually increase their fitness levels or those who are training for specific goals.
Display Console: A well-designed display console can greatly enhance your workout experience by providing real-time feedback on your performance. Look for consoles that are easy to read and display multiple metrics, enabling you to track your progress effectively.
Size and Weight Capacity: Before purchasing, measure your available workout space and check the machine’s dimensions. Additionally, verify that the elliptical can support your weight, as most models come with specified weight limits that should be adhered to for safety.
Quiet Operation: A quiet elliptical is ideal for home use, especially in apartments or shared living spaces. Machines with magnetic resistance tend to be quieter than those with friction resistance, making them a better choice for noise-sensitive environments.
Ease of Assembly: Some elliptical machines come fully assembled, while others may require assembly. Opt for models that are known for being easy to put together, as complicated instructions can lead to frustration and discourage regular use.
Warranty: A comprehensive warranty can protect your investment in case of defects or malfunctions. Look for manufacturers that offer extended warranties, as this can indicate their commitment to quality and customer satisfaction.
Which Features Are Essential for Home Use?
When considering the best elliptical machine for home use without a subscription, several essential features should be taken into account:
- Durable Build Quality: A robust frame and high-quality materials ensure longevity and reliability during workouts.
- Adjustable Resistance Levels: This feature allows users to customize their workout intensity, catering to different fitness levels and goals.
- Compact Design: An elliptical machine that is space-efficient makes it easier to fit into a home gym or living space.
- Ergonomic Features: Comfortable grips, adjustable pedals, and a smooth stride length can enhance the user experience and reduce the risk of injury.
- Display Console: A clear and informative display provides real-time data on metrics like speed, time, distance, and calories burned, helping users track their progress.
- Quiet Operation: Machines that operate quietly are ideal for home use, allowing workouts without disturbing others in the household.
- Easy Assembly: A straightforward assembly process is crucial for those who want to quickly set up their equipment without the need for professional help.
Durable build quality is essential because it ensures that the elliptical can withstand regular use without wearing down or breaking. Look for machines made from steel or high-quality plastic, as these materials typically offer better stability and longevity.
Adjustable resistance levels are important for users seeking to progress in their fitness journey. By allowing individuals to increase or decrease the resistance, they can tailor their workouts to match their current fitness level or specific training goals.
A compact design is particularly beneficial for home environments where space may be limited. Ellipticals that can fit into smaller areas without sacrificing performance are ideal for maximizing workout space.
Ergonomic features, including well-placed grips and adjustable pedals, significantly enhance comfort during workouts. A smooth stride length that matches the user’s natural motion is also vital to ensure an enjoyable exercise experience.
The display console should be user-friendly and provide accurate feedback on important workout metrics. This information can motivate users and help them set achievable fitness goals.
Quiet operation is a significant consideration for home use, especially in shared living spaces. A machine that operates silently allows users to work out at any time without causing disturbances.
Finally, easy assembly is crucial for those who want to start using their elliptical right away. Machines that come with clear instructions and require minimal tools are preferred by many users, making the setup process hassle-free.
How Does Brand Reputation Impact Your Choice?
Resale value can be an important consideration for buyers. Reputable brands typically have loyal followings, meaning that even if you decide to sell the machine later, it may retain a higher value compared to less-known brands.
What Are the Best Elliptical Machines Without Subscription?
There are several high-quality elliptical machines available that do not require a subscription for usage, making them great options for home workouts.
- Sole Fitness E35: The Sole E35 is known for its smooth operation and robust construction. It features a 20-inch stride length and an adjustable incline, accommodating users of various heights and fitness levels, while its built-in speakers and Bluetooth connectivity provide an enjoyable workout experience without additional costs.
- NordicTrack Spacesaver SE7i: The Spacesaver SE7i is a compact, foldable elliptical that is perfect for those with limited space. It offers multiple resistance levels and an adjustable stride, allowing for a customizable workout, and its user-friendly interface ensures you can track your progress without needing a subscription.
- ProForm Endurance 520 E: This model is designed to provide an effective full-body workout with its 18-inch stride length and adjustable incline settings. With built-in workout programs and a user-friendly display, the ProForm Endurance 520 E allows for a versatile fitness experience without the need for ongoing fees.
- Schwinn 470: The Schwinn 470 elliptical is praised for its advanced features, including 29 workout programs and 25 resistance levels. This machine offers a smooth ride and is equipped with Bluetooth connectivity for app tracking, all while allowing users to enjoy all its features without any subscription fees.
- Horizon Fitness EX-59: The EX-59 is designed for comfort with its ergonomic design and adjustable foot pedals. It comes with a variety of built-in workout programs and a simple console display, making it easy to engage in effective workouts without the burden of subscription costs.
How Do These Machines Compare on Quality and Price?
| Machine | Quality | Price | Warranty | Weight Capacity | User Ratings |
|---|---|---|---|---|---|
| Machine A | High durability with a smooth, quiet operation. | $400 – Mid-range price for good features. | 3 years | 300 lbs | 4.5/5 |
| Machine B | Moderate quality, suitable for casual users. | $250 – Budget-friendly option, fewer features. | 1 year | 250 lbs | 3.5/5 |
| Machine C | Excellent build quality and user reviews. | $600 – Higher price but offers advanced features. | 5 years | 350 lbs | 4.8/5 |
What Unique Features Set Them Apart from Others?
The best elliptical machines without subscription offer unique features that enhance user experience while saving on ongoing costs.
- Manual Resistance Adjustment: Many of these machines allow users to change resistance levels manually, providing a customizable workout without the need for a subscription service. This feature not only saves money but also gives users complete control over their fitness regimen.
- Built-in Workout Programs: Some models come equipped with a variety of pre-set workout programs designed to target different fitness goals, such as weight loss or endurance training. These programs can provide structure and motivation without requiring an additional fee for app-based workouts.
- Compact Design: Many subscription-free ellipticals have a space-saving design, making them ideal for home gyms with limited space. This allows users to enjoy a full-body workout without having to compromise on room for other equipment.
- Durability and Warranty: High-quality machines often come with robust construction and extended warranties, ensuring longevity without the need for frequent replacements. This aspect can significantly reduce long-term costs compared to cheaper models that may require more maintenance.
- Bluetooth Connectivity: Some elliptical machines provide Bluetooth capabilities, allowing users to sync their devices with fitness tracking apps. This feature enables users to monitor their progress without the need for subscription services, keeping track of workouts and personal records independently.
- Quiet Operation: Many of the best elliptical machines are designed for quiet operation, which is particularly beneficial for home use. This allows users to work out any time of day without disturbing others in the household.
What Are the Advantages of Using an Elliptical Machine Without Subscription?
The advantages of using an elliptical machine without a subscription include cost savings, flexibility, and accessibility to workouts.
- No Monthly Fees: One of the most significant benefits is the absence of recurring subscription costs, allowing users to invest in the machine itself without ongoing financial obligations.
- Unlimited Access: Users can exercise at their convenience without being tied to a specific schedule or limited access times, making it easier to fit workouts into busy lifestyles.
- Variety of Workouts: Many elliptical machines come with built-in programs that provide various workout options, allowing users to engage in diverse routines without needing a subscription service.
- Personalized Training: Without subscription limits, users can tailor their workouts based on their fitness levels and goals, adjusting resistance and incline as needed during each session.
- No Commitment: Users can explore their fitness journey without the pressure of adhering to a subscription plan, making it easier to maintain motivation and consistency.
No Monthly Fees: One of the most significant benefits is the absence of recurring subscription costs, allowing users to invest in the machine itself without ongoing financial obligations. This can lead to significant savings over time, especially for those who use the machine regularly.
Unlimited Access: Users can exercise at their convenience without being tied to a specific schedule or limited access times, making it easier to fit workouts into busy lifestyles. This flexibility is particularly beneficial for those with unpredictable time commitments or family responsibilities.
Variety of Workouts: Many elliptical machines come with built-in programs that provide various workout options, allowing users to engage in diverse routines without needing a subscription service. This variety helps prevent workout monotony and keeps users motivated to continue their fitness journey.
Personalized Training: Without subscription limits, users can tailor their workouts based on their fitness levels and goals, adjusting resistance and incline as needed during each session. This customization fosters a more effective workout experience, catering to individual progress and preferences.
No Commitment: Users can explore their fitness journey without the pressure of adhering to a subscription plan, making it easier to maintain motivation and consistency. This low-pressure environment encourages long-term adherence to fitness goals without financial anxiety.
How Can You Ensure Effective Workouts with These Machines?
To ensure effective workouts with the best elliptical machines without a subscription, consider the following factors:
- Adjustability: Look for machines that allow you to customize resistance and incline levels.
- Durability: Choose a model made from high-quality materials that can withstand regular use.
- Size and Space: Consider the machine’s footprint to ensure it fits comfortably in your workout area.
- Workout Programs: Opt for machines that offer a variety of built-in workout programs to keep your routine engaging.
- Heart Rate Monitor: A built-in heart rate monitor can help you track your intensity and stay within your target heart rate zone.
- User-Friendly Display: A clear and intuitive display can make it easier to navigate workout settings and track progress.
Adjustability is crucial because being able to modify the resistance and incline allows you to tailor your workouts to your fitness level and goals, promoting consistent progress and preventing plateauing.
Durability is important as elliptical machines are a significant investment; selecting a sturdy model ensures it will withstand daily workouts without breaking down. This not only increases the lifespan of the machine but also provides a safe workout environment.
Size and space considerations are essential for home users to ensure that the machine fits well in their designated workout area without crowding or obstructing movement, which can cause frustration during workouts.
Having a variety of built-in workout programs can enhance your experience by providing structured routines that target different fitness goals, such as weight loss, endurance building, or interval training, thus keeping your sessions varied and motivating.
A heart rate monitor is beneficial for keeping track of your exercise intensity; by knowing your heart rate, you can adjust your workout to stay within optimal levels for fat burning or cardiovascular conditioning.
A user-friendly display is vital for an enjoyable workout experience, allowing you to easily track your time, distance, calories burned, and other metrics without distraction, which can enhance focus and efficiency during exercise sessions.
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