Unsure if you should be training to failure or not? Or if leaving some reps in the tank now and then could lead to better results? Well look no further as today I am talking to three leading authorities on the topic; Mike Israetel, Eric Helms and Zac Robinson. We cover the advantages of going to failure but also the shortcomings, whether or not the stimulus-to-fatigue ratio differs depending on the context for proximity to failure and finally giving you some practical advice on how to manage proximity to failure in your own programme.