The ProForm Carbon EL Elliptical and the iFIT Train Membership boast technology that makes fitness more effective and convenient than ever. iFIT tracks your performance and automatically changes the 18 resistance levels to exactly what you need, so every workout is personalized to ...The ProForm Carbon EL Elliptical and the iFIT Train Membership boast technology that makes fitness more effective and convenient than ever. iFIT tracks your performance and automatically changes the 18 resistance levels to exactly what you need, so every workout is personalized to you.