Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity

Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity
Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity

Cardio Trainer Manual Treadmill w/ Adjustable Incline, 300+ lb Capacity


14 reviews

Regular price $779.99 Save $-779.99

74 in stock

monitor icon

Digital Monitor

sturdy frame icon

300 lb Weight Capacity

adjustable incline levels icon

Manual Incline

resistance icon

16-Level Adjustable Resistance


Challenge your cardio routine with the SF-T7878 Magnetic Training Treadmill by Sunny Health & Fitness. With a weight capacity of 300lbs, feel confident when you dash on the running surface (47.5L x 17.5W in). Take advantage of the two, 11-pound flywheels that maintain running belt momentum and adds additional resistance to your exercise. Quickly control workout intensity by using the manual incline adjustor tool, which allows you to switch between three fixed levels of incline. Grab the slip-resistant multi-grip handrails, which you can use as support during dynamic cardio exercises, including high-intensity interval training. Use this cardio machine to practice controlled movements like sled-like training exercises that target muscles in your shoulders and improve your speed. Want even more resistance? Cycle through 16 levels of adjustable magnetic resistance that makes it progressively harder to maintain your running speed. 


DIGITAL MONITOR w/ Device Holder

Tracking your progress is simple with the built in Digital Monitor screen! The heart rate monitor- which quickly tells you how fast your heart is beating - can help you exercise at the correct intensity for maximum results. Screen display will showcase the distance and time to keep you focused to achieving any type of personal fitness goals. Use the performance monitor to track speed, distance, time, calories burned, and heart rate.


Pulse Sensors

Monitor and maintain your target heart rate. Measuring your pulse rate is an important tool for exercising correctly and efficiently. The more steady and prolonged the elevated heart rate is during the workout, the more fat is burned. This important piece of health data will help you better understand your health and fitness status.


16-Adjustable Resistance levels

Switch up the intensity of your workout with the 16 levels of magnetic resistance. With a simple twist, you can increase or decrease resistance so your workout can remain challenging and effective throughout your fitness journey. Perfect for any user's skill level!


Dual 11 lb Weighted Flywheels

Creates stable and smooth response for user. Weight of flywheels requires a higher energy demand from the user to get the belt started. Increases speed, power output and tensions.



Personalize the level of intensity of your workout with 3 different manual incline positions. Walk, Jog, or Run with adjustable inclines to maximize your calories burned. Taking advantage of the incline features on your treadmill is a great way to maximize your workout’s intensity without increasing the time or speed of the workout which could put additional stress on your joints.


Spacious Tread Deck

With a 47.5L x 17.5W in running surface, this fitness machine requires zero electricity and is completely self-powered. The adjustable resistance and fixed incline allow you to enjoy a versatile and muscular power based cardio workout.


Soft Drop System

The soft-drop hydraulic mechanism on the Sunny treadmills is a great feature that allows the deck to gently lower itself to the floor. The soft drop hydraulic mechanism assures safe, hands free unfolding. No longer will you fear scuffing your floors when dropping your treadmills base. Fold your treadmill for storage and unfold your treadmill when it’s time to work out.


Transportation wheels

Built in transportation wheels for easy portability. Simply tilt and roll out for use or away for storage, no need for heavy lifting or muscle strain.



Fold the treadmill deck upward to save space when the machine is not in use. The soft-drop technology makes it simple to lower the deck to the ground without damaging home surfaces.



Monitor: scan, speed, distance, time, calorie, odometer, pulse

3 Adjustable incline levels

16 Adjustable resistance levels

Pulse sensors

Device holder




Multi grip handlebars

Soft-drop system

47.5L x 17.5W in running deck

Transportation wheels


300 lb Weight capacity

Adjustable magnetic resistance

(2) 11 lb Flywheels

Manual incline



Warranty: 3 year structural frame 180 days other parts and components

Product weight: 102.2 lb

Product dimensions: 56L x 26.5W x 55.5H in

Folded dimensions: 28L x 26.5W x 55.5H in

Ship weight: 126.8 lb

Ship dimensions: 29.6L x 28.7W x 56.6H in

Warning iconCancer and Reproductive Harm -

  Warning iconCancer and Reproductive Harm -


The Product Manual may be downloaded below. If you have any questions, please feel free to contact our customer care team.

No, the treadmill does not need to be plugged in and the treadmill belt is powered by the speed of the user.

Yes! We have a great library of workouts that you can perform on your treadmill, which can be found on the Workouts section of our website as well as on our YouTube channel.

Manual treadmills are great for high intensity workouts as the force you apply to the tread deck will increase momentum of the flywheels. You can walk, jog, or run for a variety of cardio workouts.

The magnetic resistance applies resistance progressively to the two flywheels making it more challenging to get the treadmill up to speed and burn more calories while conditioning your lower body further. There are 8 magnetic resistance levels available on this treadmill.

This treadmill has 3 incline levels that can be adjusted manually.

Feel confident on our durable design with a 300LB max user weight limit.

The digital monitor helps track time, speed, distance, calories, and hand pulse. With its convenient scan mode, you can choose to see all numbers continuously repeated throughout your workout.

Yes! The treadmill can be easily and safely folded and unfolded with the soft drop hydraulic mechanism, and moving the treadmill to storage from your workout space is made easy with the transportation wheels.

There is a 3-year warranty on the structural frame and 180-day warranty on other parts and components.

Customer Reviews

Customer Reviews
4.8 Based on 14 Reviews
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Chris C.
Solid and performs well

Solid machine wish there was a bottle holder but other than that, this treadmill performs well and is sturdy.

Benjamin H.
So worth the wait

Finally got my hands on it. It's honestly been worth the wait. This is a fantastic treadmill and there's so much that you can do versus an automatic treadmill.

Kathy P.

I've used automatic treadmills all my life so I wasn't sure what to expect with a manual treadmill. However, I realized that I am getting a great workout that doesn't come close to the powered treadmills. I highly recommend this manual treadmill if you're looking to take your workout to the next level.

Arlene K.
Amazing workout!

This manual treadmill certainly gives you an amazing workout!! I'm training to be able to workout at the highest resistance and will update you with my progress! So far, I am enjoying this treadmill very much!!

Aaron S.
Manual over automatic

We got rid of our automatic treadmill because it wasn't safe for my dad after he took a tumble. This manual treadmill is great because it doesn't move until you start walking. We're very happy with the quality and more happy that he can work out safely at home.

Tyler T.

This is a very well designed treadmill. Simple to assemble with quality construction. It's perfect for slow walking, fast walking or even jogging as long as you hold onto the bars. Great for those looking to take it slow or train!