From my experience experimenting with both thumb over and thumb under grips during pull-ups, I've found that each grip provides unique benefits depending on your workout goals. Using the thumb under grip tends to feel more secure and stable. The wrap-around grip allows for better force transfer from your forearms and biceps, which can help when performing weighted pull-ups or aiming to build maximum strength. As some athletes point out, this grip often supports heavy weighted reps and recruits your arm muscles more intensely. On the other hand, the thumb over grip feels more comfortable and natural for many people, especially during high-rep sets or longer training sessions. While it may reduce some grip strength and stability, it allows a greater range of wrist movement and can reduce fatigue, enabling you to push through more repetitions effectively. It's important to note that individual anatomy plays a big role in which grip feels better. Factors such as wrist flexibility, hand size, and forearm strength can influence comfort and performance for each grip style. In my case, alternating grips not only prevents overuse injuries but also targets muscles differently to promote balanced development. Additionally, I found that incorporating both grips into my training helps improve overall grip strength and endurance. For example, starting with thumb under grip in lower-rep strength sets and finishing with thumb over grip in high-rep burnout sets has worked well. Ultimately, there is no one-size-fits-all answer. The best approach is to try both grips, listen to your body, and choose the grip that aligns with your specific training goals and comfort. Also, experimenting with grip width and hand positioning can further refine your pull-up technique. Remember, the key is consistent practice and paying attention to how your muscles respond. Share your experiences and preferences too, as personal insights can be invaluable for others navigating their pull-up training journey.