The community suggests that specifically strengthening the hip flexors is essential for optimizing running performance, improving posture, and reducing pain associated with a sedentary lifestyle.

noli's read

Science confirms that the hip flexors play a crucial dynamic role in the recovery phase of the stride (the swing of the leg). Observational studies and research in sports biomechanics indeed highlight that their weakness can limit the efficiency of the running cycle. The idea that prolonged sitting weakens and shortens these tissues is a classic topic in fitness, although the direct link between isolated strengthening and postural correction (such as pelvic tilt) is more complex and debated. It is an exaggeration to think that isolated strengthening is a universal miracle solution, as a strong posterior chain is just as indispensable for propulsion. Furthermore, the concern expressed by some users that strengthening might aggravate excessive arching of the back remains a hypothesis without a strong clinical consensus, with mobility often being as important as pure strength. The community converges toward a positive appreciation of strengthening, although a minority raises legitimate questions about overall muscular balance.

the sources

1. 1r/AdvancedFitness