strengthen, lengthen, tone. let s go inside and check it out. but it looks more like a torture chamber than it does a fitness class. some people say it is a torture chamber. slt is like pilates on crack. it s a combination of cardio, strength training and pilates. it is a slow workout where you do every move for extended periods of time so you work your muscles to muscle failure. i can totally see why the celebrities, victoria s secret models do this, it s tough. it s muscle shaking, sweat inducing and fun workout, 50 minutes full body, core focused