Combines sit-ups with the concept of the yoga plank position to kick your core into overdrive. Immediately engages your entire midsection, buns & thighs and a full range of crunch motions for results youll love. Now with a larger Smart Monitor that displays your exercise duration, repetitions & calories burned. It features customizable difficulty settings for a workout to fit every fitness level. New heart rate monitor - built right into the easy-to-grip handles, this sensor tracks your pulse as you exercise. Rotating knee pads - swivel to the left or right as you crunch for increased resistance & an even more intense workout. Compact & easy to store - no need for extra space - just fold it up when your workout is finished to store easily under the bed or in a closet; . One size fits all. General information: Size H128, W35, D56cm. Batteries required 2 x AAA (included).