If young women who don't usually work out do leg exercises focusing on the last part of the knee bend, they get stronger in that exact spot—especially when they train between 65° and 30° of knee bend.

What we've found so far suggests that training in the final range of knee motion may improve strength more at that specific angle in untrained young women. Our analysis of the available research shows the evidence leans toward this idea. We analyzed the evidence to see whether focusing leg exercises on the last part of knee extension — specifically between 65° and 30° of knee bend — leads to greater strength gains at that angle in young women who don’t usually work out. What we’ve reviewed so far includes 45.0 supporting assertions and no studies or claims that refute it [1]. This means every piece of evidence we’ve looked at supports the idea that strength improvements are greater at the trained angle when exercises target that final range of motion. We don’t yet know how this compares to training other knee angles or whether the effect holds over longer periods or with different exercises. Also, we’re only looking at untrained young women — the findings might not apply to trained individuals, men, or older adults. Since all the current evidence supports this outcome and none contradicts it, our current analysis leans in this direction. But we also recognize that more research could change or refine this view over time. The takeaway: If you're an untrained young woman doing leg exercises and want to get stronger at the end range of knee extension — like the last bit of straightening your leg — focusing your training between 65° and 30° of bend might help target that specific area. This could be useful for daily movements or rehab, but it doesn’t necessarily mean you’ll get stronger at other knee angles.