Sunny Health & Fitness ASUNA Hi-Performance 7700 Manual Treadmill

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ASUNA 7700

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440 lbsManual,
8 levels
Frame: 5 years
Parts: 180 days

The ASUNA Hi-Performance 7700 is one of the new treadmills released by Sunny Health & Fitness in 2018. It’s non-electric machine with manual action but does offer an impressive weight capacity and sturdiness, offering the possibility to perform high-intensity cardio workouts.

Technical Details and Specifications

  • Assembled dimensions: 55L x 30W x 57H inches (140L x 76W x 145H cm)
  • Running surface dimensions: 49L x 19W inches (124L x 49W cm)
  • Deck cushioning: 6 cells
  • Assembled weight: 167 lbs (76 kg)
  • Weight capacity: 440 lbs (200 kg)
  • Incline: Manual, 10°-14°
  • Resistance: Magnetic, 8 levels
  • Exercise meter: No
  • Warranty: Frame 5 years / Parts 180 days

Frame construction

The ASUNA 7700 Hi-Performance treadmill features a heavy-duty frame made of steel tubing. Both its deck and the front section of the frame with the upright masts are very sturdy, the whole machine being rated for a maximum load capacity of 440 lbs (200 kg).

The front masts of the machine are curved to improve sturdiness, but also provide an aesthetic touch to the machine. The handlebar assembly features a multi-grip design, offering the possibility to perform a wide variety of workouts, from light-cardio, walking and recovery training, to high-intensity HIIT workouts. The whole handlebar assembly is coated with a rubber layer in order to provide a sweatproof, secure grip.

This Sunny Health & Fitness treadmill is not equipped with any console. However, it does include a tablet holder which can support any type of tablet. You can also your own heart monitor device to it if you have one. The unit itself does not have any pulse reading function or Bluetooth, nor it can communicate with any fitness app.

The fully assembled unit is not extremely large compared to other treadmills, such as the Bowflex BXT216, for example. It only takes 55″L x 30″W (140 x 76 cm) of floor space. On top of that, its deck is foldable. You can fold it vertically and lock it in this position with the knob on the left mast. The folding mechanism also integrates a hydraulic cylinder which assists you when unfolding the deck, slowly lowering it until it touches the floor to prevent any damage. With the deck folded up, the unit’s length is reduced to 27.5″ (70 cm).

Despite the fact that it is a rather small treadmill, the ASUNA 7700 is not exactly a light fitness machine. It weighs approx. 167 lbs (76 kg); therefore, it is recommended to be carried and assembled by two persons. However, once the unit is fully assembled, its transport shouldn’t be too difficult because its front base frame features a set of transport wheels. Also, the front metallic base frame has adjustable stabilizers to perfectly level the unit on any type of floor.

All the steel parts in the machine’s frame construction are coated with a durable paint finish which is resistant to corrosion. The color used is black, this being the only color available for this model (at least for the moment).

Deck and running surface

As we’ve mentioned above, the Sunny ASUNA 7700 features a highly durable deck which can support users up to 440 lbs (200 kg). It integrates a solid running board, while the side rails as steel-made, with a sheet of non-slip material on top.

The tread belt is made of heavy-duty rubber material featuring a textured surface to provide a high adherence during all exercises. It offers a running surface of 49″L x 19″W (124 x 49 cm) which should be enough for users up to 6’2″ (188 cm). Taller users may find it a bit small for their complete stride, but walking or light jogging workouts are still possible for them as well.

The diameter of the integrated rollers is not specified, but they are fairly thick for a small deck, providing an excellent traction for the belt. They also integrate high-grade ball bearings for a smooth motion.

Just like most other treadmills, the ASUNA Hi-Performance 7700 features an integrated deck cushioning system. Its deck integrates 6 cushioning cells, placed in pairs of two at the rear, at the middle and at the front of the deck. This being said, the unit delivers a lower impact on your ankles, knees, hips, and spine during running.

Incline and step-up height

The Sunny Health & Fitness ASUNA Hi-Performance 7700 is equipped with a manual incline system. It consists of two adjustable “feet” situated at the rear of the deck. This being said, in order to adjust the incline of the deck, you have to fold it first, adjust the two feet to the desired position, and then unfold it once more. Since the incline system is not automatic, you cannot adjust it during exercising.

The lowest incline of the deck is obtained with the two rear feet extended to their maximum position. This way, the unit provides an incline of approx. 10°. Conversely, with the feet adjusted to their minimum length, the rear of the deck will be lower, and therefore, the deck will provide an incline of approx. 14°. This being said, the incline span is approx. 4°. It’s also very important to mention that the deck does not offer a completely horizontal position.

When it comes to step-up height, the rear part of the deck is situated at approx. 5″ (13 cm) above floor level when the incline is set at its lowest. Conversely, the highest point of the running surface is approx. 15″ (40 cm) above floor level. Therefore, to prevent any hindrance during exercising, it is recommended to assemble and use the unit in a room with a ceiling that is at least 20″ (51 cm) higher than your own height.

Resistance system

If we haven’t mentioned enough, the Sunny ASUNA Hi-Performance 7700 is a manual treadmill. It does not use a motor for moving the belt. This being said, the adjustment of the belt speed cannot be done automatically, and doesn’t have a delimited speed range; you can basically run as fast as you can on it.

The front roller of the machine integrates a dual flywheel system, which adds smoothness to the ride and reduces belt and deck vibration. The flywheel assembly on the right integrates a manual magnetic resistance system which consists of a magnetic brake that is attached to the tension dial on the right mast through a steel cable. If you press the dial down, the brake moves closer to the flywheel which results in an increased magnetic pull on the flywheel, which leads to an increase of the overall belt movement difficulty.

The unit’s tension dial features 8 distinct level of difficulty. According to several user reports, even the lowest tension delivers quite a bit of belt movement difficulty. This being said, the treadmill promotes high-intensity training and great possibilities to develop your stamina and strength.

Assembly and Maintenance

The ASUNA 7700 comes fully assembled and in folded position. The only part that requires assembly is the tablet holder. This being said, the setup of the machine should not take more than 5-10 minutes. The manual provides all the necessary instructions.

For maintenance, the deck will require lubrication before the first use, and then periodically, depending on how often you use the machine. The necessary instructions for this are provided by the manual. Also, a tube of silicone lubricant is included with the unit. Other than this, it is recommended to inspect the unit from time to time and re-tighten any potential loose bolts or parts.

The Pros

  • Heavy-duty frame and deck – can support users up to 440 lbs
  • Small footprint;
  • Folding design with a soft-drop hydraulic system;
  • Adjustable stabilizers on the front base;
  • Transport wheels included;
  • Multi-grip handlebars;
  • Tablet holder included;
  • Non-slip side rail covers;
  • Manual belt action offering the possibility to run as fast as you can;
  • Manual incline with a range between 10°-14°;
  • 6 shock absorption elements integrated into the deck;
  • Dual flywheel system for a smooth and steady belt movement;
  • Manual magnetic resistance with 8 distinct levels;
  • Quiet operation; 
  • No power consumption;
  • Comes almost completely assembled;
  • Little maintenance required;
  • Excellent warranty.

The Cons

  • The deck cannot be set in a horizontal position;
  • No exercise meter;
  • The incline cannot be adjusted during the usage of the machine.


The Sunny Health & Fitness ASUNA Hi-Performance 7700 is a heavy-duty manual treadmill designed for high-intensity cardio and interval workouts. It features a dual flywheel system for a smooth belt motion, a magnetic resistance system for adjusting the belt movement difficulty, and a multi-grip handlebar with a tablet holder. Its also has a manual incline system. And finally, it’s not exactly an affordable unit but does offer an excellent quality for the price.

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