Some human studies suggest that stretching may be a viable strategy to induce hypertrophy. However, more research is needed to get more prolific evidence. Yet, adapting stretching by using additional loads or with a piece of specific equipment may show more impressive results on muscle hypertrophy. That said, remember to use caution when adding additional load to a stretch. As this is a way of forcing your body to move into a deeper stretch than you would typically have by just using gravity. If you go this route, start with your bodyweight and gravity and then slowly progress at your own pace to add in an additional load.