Sunny SF-E3875 Elliptical Trainer | Low-Impact Cardiovascular

Start a low-impact cardiovascular training routine with the Sunny SF-E3875 Elliptical Trainer. Confidently stride when you step onto the oversized textured footplates designed for optimal grip and balance. Crafted for long-lasting workouts, the durable steel frame on the elliptical cross trainer supports a maximum user weight of 300 lbs.

The SF-E3875 elliptical is for dynamic workouts; you can pedal forward and backward along the 19.5-inch stride length while working every muscle in your lower body. Increase workout intensity by adjusting the 16 levels of computerized resistance in taps.

The Sunny SF-E3875 elliptical trainer features a fitness monitor to track your time, distance, speed, calories burned, heart rate, wattage production, and RPM. Take advantage of 24 different program modes. Additionally, preset goal-driven workouts will base your performance on watt generation, BMI data, heart rate, and custom user values.

It’s easy to monitor and maintain your target heart rate with the Sunny SF-E3875. Measuring your pulse rate is an essential tool for exercising correctly and efficiently. The more steady and prolonged the elevated heart rate is during the workout, the more fat gets burned. This critical health data will help you better understand your health and fitness status.

Learn more in my complete review below!

Sunny SF-E3875 Elliptical Trainer
Sunny SF-E3875 Elliptical Trainer

Product: Sunny SF-E3875 Elliptical Trainer

Price: For a great deal on this elliptical, merely go here to Sunny Health &

Warranty: Frame 3 years / Parts 180 days

My rating: 8.25/10

Affiliate Disclosure: As a Sunny Health & Fitness Affiliate Program participant, I earn commissions on purchases made through links in this post. Full disclosure

Details and Specifications

  • Assembled dimensions: 62″L x 26″W x 70″H (157L x 66W x 178H cm)
  • Assembled weight: 189.6 lbs (86 kg)
  • Weight limit: 300 lbs (136 kg)
  • Stride: 19.5 inches (49.5 cm)
  • Incline: No
  • Resistance: Eddy current, 16 levels
  • Fitness Monitor: 24 programs
  • Extras: Bottle holder, tablet holder
  • Warranty: Frame 3 years / Parts 180 days

SF-E3875 Frame and parts

The Sunny Health & Fitness SF-E3875 features a frame made of steel tubing with heavy-duty construction. With all the parts assembled, it weighs approximately 189.6 lbs (86 kg); thus, it takes two people to carry the machine.

Sunny SF-E3875 Elliptical Trainer

However, on the other hand, all this weight is reflected in its overall stability. Plus, its four adjustable and rubberized levelers enhance its stability.

Despite its weight, once assembled, it is relatively easy to move. Its front base has two large rubberized wheels, while its rear tube features a lifting handle. Therefore, you won’t have to handle more than 30% of its total weight by lifting it from its grip and using the front wheels.

The machine’s metallic base is a one-piece element. Due to this aspect, the machine provides superior sturdiness. It also has a dual rail system for the pedals, which leads to better stability and a sure-footed feeling during pedaling.

The steel bars in this Sunny elliptical trainer’s frame construction come coated with a durable powder finish resistant to chipping and corrosion.

The top metallic covers of the rails are an exception, though. They are aluminum materials, and they’re not powder coated. The front covers of the drive and resistance elements are ABS material; this also stands for the pedals.

The Sunny SF-E3875 is a relatively large unit. When fully set up, it is approx. 63″ (157 cm) long and 26″ (66 cm) wide, while its highest point is the top of its moving arms, which reach approx. 70″ (178 cm) above floor level. Thus, it would be best if you assigned a usage area for it of at least 110″ x 70″ (280 x 178 cm).

The machine has two sets of handlebars, one mobile and one fixed. The mobile handlebars feature extended, curved, and ball grips at the top. The fixed handlebars weld directly to the front main mast; they offer a horizontal grip. They also integrate metallic sensors for heart rate detection.

Stride, elliptical path, and step-up height

First of all, Sunny SF-E3875 does not have an incline system. Therefore, the elliptical path and the stride length are not adjustable. However, the machine offers a stride length of approx 19.5″ (49.5 cm). Consequently, it should accommodate users up to 6’2 ″ – 6’3 ″ (188 – 190 cm) with no problem, promoting a complete range of motion.

Sunny SF-E3875 Elliptical Trainer
Sunny SF-E3875 Elliptical Trainer

The pedals can support users up to 300 lbs (136 kg). They are made of durable ABS material and attached to heavy-duty steel bars. Also, they have a textured surface for improved adherence and inner borders for extra foot stability.

They integrate a double-wheel system each for superior stability. In addition, the integrated wheels feature industrial-grade ball bearings for smooth motion over the rails.

This elliptical path of this Sunny cross-trainer is slightly inclined forward. Thus, the pedaling motion feels like descending on a very soft ramp. Therefore, it focuses on the glutes but delivers a consistent workout for multiple muscles.

At their lowest position, the pedals are at approx. 10″ (25 cm) above floor level. Conversely, their highest position is approx. 16″ (40 cm) above floor level. Therefore, placing and using the machine in a room with a ceiling at least 20″ (51 cm) higher than your height is advisable.

SF-E3875 Drive and resistance

The Sunny Health & Fitness SF-E3875 elliptical machine integrates a pretty heavy flywheel. Its exact weight is not specified, but it should be at least 20 lbs (9 kg), considering the machine’s overall weight. The flywheel has a balanced structure to deliver smooth motion and a consistent pedaling feel.

It is also bi-directional, allowing you to pedal in reverse if you focus on other muscle groups.

This Sunny elliptical trainer uses a poly-v belt for its transmission. Therefore, its drivetrain does not require any periodic lubrication. It also produces considerably less vibration than a chain drive, and the usage of the machine is almost entirely silent.

The Sunny SF-E3875 features a motorized magnetic resistance system. Its main internal resistance elements are a small servo motor and a magnetic brake integrated into the flywheel assembly. Unfortunately, the motor changes the brake’s magnetic pull when adjusting the resistance, leading to pedaling difficulty.

Sunny SF-E3875 Elliptical Trainer

The resistance can only adjust from the fitness monitor, and the unit requires a connection to a power source. A power adapter comes with the machine. Also, some of the programs on the monitor automatically adjust the resistance.

The trainer’s resistance system offers 16 distinct difficulty levels. The first few provide little pedaling difficulty, making them great for recovery training. Conversely, the 15-16 levels considerably increase the pedal tension, allowing you to burn more calories, reach a higher pulse rate in a shorter time, and benefit from a more consistent workout overall.

Fitness monitor

This Sunny elliptical trainer includes the same fitness monitor as the SF-E3862. It’s a mid-range monitor that provides a set of built-in programs. Unfortunately, it does not have Bluetooth or online capabilities.

The monitor has an LCD with a 6-inch diagonal and a blue LED backlight, improving the shown data’s readability. In addition, it tracks the most crucial workout metrics, including time, distance, total distance, speed, RPM, watts, calories, heart rate, and target heart rate.

The monitor is not telemetric, which means it can only read your pulse through the sensors integrated into the fixed handgrips. Unfortunately, it cannot communicate with any wireless HR transmitters. In addition, the speed and distance are also in Imperial MPH and miles; there is no option to set the monitor to metric units.

SF-E3875 Workout Programs

There are 24 workout programs available on the machine’s fitness monitor, from P1 to P24. The P1 program is the Manual mode. This program allows you to exercise freely, adjusting the resistance throughout your session. It also allows you to set workout goals for time, distance, and burned calories.

Sunny SF-E3875 Elliptical Trainer
Sunny SF-E3875 Elliptical Trainer

The programs from P2 to P13 are preset. Each has 12 profiles, and you can select up to 16 resistance levels for each. The P14 program is for Watt Control. It allows you to select a target value for your Watt output.

The P15 program is a Body Fat calculator. It will prompt you to input your height, weight, age, and gender, and based on this data, the monitor can calculate your Body Mass Index (BMI).

The P16 – P20 are HR-based programs. They require you to use HR pulse sensors. P16 is a Target Heart Rate program. It allows you to select a parameter for your heart rate, and the monitor will notify you if your pulse falls below your target. The P17-P20 programs are Heart Rate Control programs with preset HRC targets at 55%, 65%, 75%, and 85%.

During any of these programs, the monitor will auto-adjust the resistance. For example, it adds intensity if your pulse falls below the selected heart rate or reduces the resistance if you exceed the desired heart rate.

Finally, the P21-P24 are Custom User programs. You can create separate workout profiles and input user data (age, weight, height, etc.) for each. Additionally, each custom program can be saved and reused as often as possible.

SF-E3875 Assembly and Maintenance

This elliptical trainer’s drive and resistance elements come pre-assembled, forming the unit’s main body. Also, the base of the trainer is a one-piece element. Therefore, the assembly’s primary step is to connect these two elements, then add the moving arms, the pedals, and the fitness monitor.

Consequently, it may take up to one hour of your time. However, it’s far from being a complicated task. Each assembly step is evident in the manual; an essential toolkit comes with the machine.

Internal maintenance is not necessary for this machine. Its joints may need lubrication from time to time, though. Also, keep the pedal bars’ rails clean, inspect the machine for loose parts, and retighten as needed.


  • Sturdy steel construction – can support users up to 300 lbs;

    Sunny SF-E3875 Elliptical Trainer
  • Adjustable stabilizers;
  • Transport wheels on the front base;
  • Lifting handle on the rear base;
  • Oversized, non-slip pedals;
  • Quiet operation, ideal for apartment use;
  • 16 levels of eddy current resistance;
  • 24 workout programs;
  • Goal settings for time, distance, calories, pulse, and watts;
  • Recovery function;
  • BMI function;
  • The fitness monitor display has an LED backlight, which considerably improves readability;
  • HR pulse sensors integrated into the fixed handlebars;
  • Tablet holder included;
  • Bottle holder included;
  • Reasonably easy to assemble;
  • Little maintenance is required;
  • Excellent warranty.


  • The fitness monitor is not telemetric;
  • Not equipped with an incline function;
  • There is no sound system;
  • The fitness monitor does not have online connectivity.

Sunny SF-E3875 Elliptical Trainer Summary

The Sunny SF-E3875 is a mid-range elliptical trainer for home use. It features an eddy current resistance system with 16 levels and a fitness monitor with 24 workout programs. Furthermore, it has a fairly sturdy construction, with a maximum user weight capacity of 300 lbs. Moreover, it’s an excellent machine for light to intense cardio workouts, muscle toning, stamina development, and weight loss.

I hope you found this article helpful and informative. Would you please speak up if you have anything you’d like to share or any opinions about my website? I look forward to your comments, questions, and the sharing of ideas.

Please remember to consult your physician to determine if you have any medical or physical conditions that could put your health and safety at risk or prevent you from using the equipment properly. In addition, your physician’s advice is essential if you are taking medication that affects your heart rate, blood pressure, or cholesterol level.

10 thoughts on “Sunny SF-E3875 Elliptical Trainer | Low-Impact Cardiovascular”

  1. Hello there! This is a detailed review of the elliptical trainer. I am a big fan of using the elliptical machine whenever I work out. You burn a pretty good amount of calories, and it’s also very light on the knees, which is fantastic. I currently have a cheap one at home that is near breaking down from overuse. Perhaps when it does fully break down and is no longer functional, I might try using this brand that you suggest. Thanks for creating this.

    • Hi Mike, thanks for stopping by and sharing your thoughts with us. When you’re ready to replace the elliptical you have, let me know, and I’d be happy to give you some recommendations.

      Best regards, Robert

  2. Hi. Thanks for this article. It was a pleasure reading it!

    Ellipticals have always been one of the best exercises for me when I used to go to the gym with a couple of friends. We would put on some music and enjoy it for about 20-30 minutes every time. Looking back, that was a lot of time! I would highly recommend it to anyone! 

    Best regards,

    • Hi Dominique, thanks for stopping by. It sounds like you and your friends had fun while exercising. What made you stop going to the gym? Were your gyms closed due to COVID-19? They should be re-opening soon. You know that you can have fun exercising at home. If I can be of any assistance in making some equipment recommendations, please let me know. I’m always happy to help. And be sure to read my elliptical buying Guide. You’ll find it in the buying guide menu.

      Kind regards, Robert

  3. Hello there,

    I cannot believe that the elliptical trainer has incredible specifications that will aid in your health, such as tracking your time, distance, speed, calories burned, heart rate, wattage production, and RPM!!! So you can measure effectively and understand more about your body and act accordingly. 

    A fantastic review and detailed throughout, a great video explaining the specifications of this excellent home use machine, and impressed by the 24-hour workout programs that integrate within:)

    • Hi Farah, thanks for stopping by. Are you interested in getting exercise equipment for home use? If so, would you please let me know if I can assist you? I’m always happy to help.

      Kind regards, Robert

  4. Elliptical trainers are always my go-to machine of choice when I need to give my knees a break from the long runs that I enjoy. The low-impact aspect is beneficial and significant because it helps me recover faster but still get a good cardio workout. I did not see any prices in the review. How much would one of these set me back?

    • Hi Al, thanks for stopping by. There are affiliate links throughout the review for checking the current price. I do this because of the manufacturing price changes. Today’s current price is $856.99. Would you please let me know if I can be of further assistance?

      Kind regards, Robert

  5. I started working out at home since the gyms shut down early last year. I have begun to enjoy doing my own workouts, and I am trying to set up my workout corner to have the equipment to give me a complete workout. I have been surviving on YouTube guided exercises, but I now feel that I should go into more meaningful programs as I don’t intend to go back to the gym. I like this elliptical machine. Besides seeming right for me, I like the features that make it moveable, that allow the use of preset programs, that the surface is resistant to corrosion, and that it is quiet. Thank you for this detailed review and the tips included.

    • Hi JJ, thanks for stopping by and sharing with us. I think it’s great that you’re working out at home. You’ve got this! Would you please let me know if I can ever be of assistance? I’m here to help.

      Kind regards, Robert


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