1. AIR RESISTANCE opposes forward/rotary arm motion.

2. ARM LEVERAGE from extending arms out and/or up intensifies the spin resistance.

WEIGHT RESISTANCE plays a smaller role and creates outward force that adds to the total resistance. 

While Spin Strong includes both air and weight resistance, it’s the unique emphasis on air resistance that makes Spin Strong so effective.

Air resistance intensely resists your forward/circular movement. You must constantly pull through it, while also continuously changing direction. As you increase speed, resistance increases exponentially. For each doubling of air speed, air resistance quadruples.

Air resistance is a function of speed and the size of the object (amount of air displacement). Spin Strong uses air resisters with a symmetrical triple-fin arrangement. They are light, but are relatively large. They are highly effective creating rotary air resistance. This approach is so innovative Spin Strong is patented.

Arms are like levers when doing rotary training. Extending arms out and/or up intensify and increase the Initial resistance. The weight resistance further increases the resistance to some degree.

The result is a highly effective form of resistance for strength training.

Additional ways to increase resistance include using more arm circle action versus wrist action. Also, configuring Spin Strong with six air resisters (additional resisters can be purchased separately) versus five significantly increases resistance.

Spin Strong provides realistic jump rope exercise using a different formula for air resistance than a jump rope. A jump rope moves through the air faster, because it is traveling around a much bigger circle each revolution. But Spin Strong trainers provide bigger objects (and more surface area) moving through the air. Spin Strong trainers have been designed to provide the same amount of air resistance for jump rope exercise.



Spin Strong trainers are designed to meet the intensity and engagement needs of all users, regardless of of fitness level. They feature a wide variety of intensity levels, exercises and uses. Spin Strong are the only portable trainers to use air resistance. Actually no other fitness device except a jump rope also uses air resistance, which puts Spin Strong in good company.


Phil Davies, the inventor and founder of Spin Strong, has two rotary trainer patents and has spent over 15 years developing Spin Strong.

Phil was diagnosed with Parkinson’s disease in 2009.

Even though he lifted weights regularly, his strength was declining.

When his oid rotary trainer (which didn’t emphasize air resistance) didn’t provide enough resistance, he created Spin Strong.


Phil has increased his strength, endurance, coordination and performance.

According to Phil, “My endurance using a punching bag increased by 300%. And for shrub and hedge trimming work, my endurance went from 30 minutes to over three hours. It was like I had my original strength back and then some.”

 Phil continues his battle against Parkinson’s and is having good success thanks to his fitness training including regular workouts with Spin Strong.