New lifters might grow more from stretching muscles than experienced lifters, but we don’t know for sure because most studies use beginners.

Muscle hypertrophic responses to training at different lengths may vary across muscle groups due to differences in architecture, biarticulation, and sarcomere number.

There is not enough scientific research yet to determine whether training muscles at longer or shorter lengths leads to better muscle growth.

Individual hypertrophic responses to resistance training are highly variable across muscle groups and are not consistently correlated between upper and lower body musculature.

When people who exercise recreationally train with their muscles stretched more during movements, they gain a bit more muscle size compared to training with varied muscle lengths, but both approaches lead to the same improvement in strength.

Total training volume, training intensity, and consistency are more significant determinants of muscle hypertrophy than the specific muscle length at which training occurs.