Weider - X-Factor: ST DVD Training Kit Crafted to push your physique to new limits, this evolving eight-week regimen educates you within the Optimization Zone, starting from your core and radiating outward – making the most of every moment of your workout. As the weeks unfold, the intensity gradually escalates, allowing you to synchronize your growth with the program's demands. Unleash the full potential of your exercise routine through the dynamic 90-second high-intensity sequences. Engage in vigorous exercises for a span of 90 seconds, succeeded by either a strength-focused movement or a moment of repose. Then seamlessly transition into the subsequent 90-second sequence. This dynamic and high-tempo approach promises an enjoyable pathway to amplify your physical fitness.