PowerCranks™ integrates a one-way clutch in each crank-arm of your bicycle or stationary bike. This patented modification changes the cranks from being fixed to each other at 180º (as are regular cranks), to being independent from one another.

Each leg can drive the bicycle but one leg cannot assist the other. This forces the use of all the muscles of the lower extremity and many core muscles in a balanced and coordinated fashion.

This mvement pattern dramatially improves your performance if you depend on your legs for speed and power. PowerCranks can increase the efficiency of your workouts for the same amount of time invested if you and your workouts suffer from time constraints (doesn't everyone's?).

Typical new users are gaining 2-3 mph in cycling speed and 1 min/mile running improvement in 6-9 months. Studies are showing about a 10% improvement in cycling efficiency, power, and VO2max in only 6 weeks (over what can be done without PowerCranks). Just so you are not fooled. These improvements do not come easily. You must be willing to do the hard work, but if you will do the work, these improvements will come, and they will be bigger than you could have ever imagined possible.

• Let each leg drive the bike without the help of the other leg
  
• Force yourself to eliminate the dead spot in your pedal stroke
  
• Fully unweight on the upstroke & train major lower extremity muscle groups
  
• Balance the muscle effort and improve coordination
  
• Increase your basal metabolic rate by working twice as many muscles
  
• Fully train the hip flexor and hamstring muscles
• Build core strength, balance, and fitness
  
• Use in rehabilitation since the good leg cannot assist the bad leg
  
• Improve your running ability in a non-impact environment
• Lower the risk of injury

Why do PowerCranks have such a revolutionary effect? Or, in other words, why is there so much room for improvement in athletes who are otherwise training hard now?

As children, we learn how to pedal our tricycles and bicycles by pushing on the downstroke and just relaxing on the upstroke. Since we were not attached to the pedals, even if we wanted to go fast, we learned we had to always keep a little back pressure on the pedals on the back stroke so we would always be in contact with the pedal, ready to apply power as soon as the pedal came over the top.

As we grew older, we learned to push harder on the downstroke but we could not reduce the back pressure on the upstroke any more or we would lose contact with the pedal. So, we all learned in order to go faster all we could do was train to push harder.

Once this coordination was ingrained it is pretty much impossible to undo without proper feedback. The reality is that, without PowerCranks™ training, we have all pretty much ignored half of the muscles in the legs. While the form we learned as chlldren as to how to go fast on the bicycle might have been optimum when we were not attached to the pedals, this form is not optimum for adults wanting to maximize performance once we become attached to the pedals.

The problem comes in figuring out how to undo these less than optimum habits that are ingrained into the nervous system after 10 to 20 years of doing it "wrong". Fortunately, now there is PowerCranks and PowerCranks ensure you will make this change if you will put in the time on them.

Why do PowerCranks have such a revolutionary effect on running improvement?

Well, it just turns out that proper cycling technique is closely related to proper running technique. Nobody was more surprised than us when we started getting the reports of these fantastic running improvements starting in as little as two weeks.

As we have come to analyze this the reasons seem obvious and if you have any questions about this we encourage you to go to the running section of the web site and watch some of our running videos. Good running form and good cycling form are closely related!

This is the change demanded in the PowerCranks™ revolution.

Become a better athlete by using more of your total muscle power. Take the PowerCranks™ challenge, see how much you can improve!

PowerCranks are such an effective training tool we give you an unconditional 90 day money-back guarantee. What other product gives you that? We can't think of any. This gives you plenty of time to get through the adaption and to start to see the big improvements.

You will come to believe they are worth every penny you pay for them or you have lost nothing. About 2 in 1000 take us up on this offer. We are not worried about how you will decide if you give them a chance.