A fitness industry assumption is that training to muscular failure is essential for optimal gains. However, recent research challenges this idea, suggesting that stopping a couple of repetitions shy of failure can be equally effective for building strength and muscle. A study comparing training to failure with leaving reps in reserve found similar physical outcomes but less discomfort and more positive feelings in the latter group. This indicates that consistently pushing to failure may negatively impact long-term workout enjoyment and adherence. Therefore, while failure training has its place, especially for specific goals or individuals, submaximal effort could be a more sustainable approach for many.