Lifting weights until you can't go further while your muscles are fully stretched probably builds more muscle than stopping when they're fully squeezed. This happens because stretching the muscle...

What we have found so far suggests that training to failure while your muscles are fully stretched likely builds more muscle than stopping when they are fully squeezed. Our current analysis shows that the evidence we have reviewed leans toward this approach for muscle growth. We analyzed the available research and found that 60 studies support, 0 studies refute. When we look at how muscles work under weight, keeping them stretched while lifting places steady tension on the fibers. This steady pull helps the muscle work harder for longer. Exercises like calf raises show this effect clearly [1]. The evidence we have reviewed leans toward the idea that holding that stretched position until you cannot lift another rep gives the muscle a stronger growth signal. We do not claim this is a final answer. Our current analysis is based on what we have reviewed so far, and we know this view will improve as more research becomes available. Not every workout or muscle group will react the same way, and we are still tracking how different movements fit into this pattern. The evidence we have reviewed leans toward prioritizing the stretched position when you push to your limit. To put this into practice, focus on lowering the weight slowly and holding the stretch at the bottom of each rep. Stop when you truly cannot move the weight again, rather than cutting the set short. This simple shift in timing may help you get more out of your training sessions.