This depends on the kind of workout you want. eBikes with torque sensors will usually provide you with a smoother and more intuitive ride, which can make it easier to stay out and keep moving longer. On the other hand, eBikes with cadence sensors can give you a better workout on hill climbs, since the motor will give you less assistance when the pedals are moving slowly—placing the bike in low gear before a climb will allow you to get a little help from the motor but still work up a sweat.