Side Split is an intermediate bodyweight exercise for the primary: adductors secondary: hamstrings.
Sliding both legs out to opposite sides until you reach your end range builds deep inner-thigh flexibility over repeated sessions. Most lifters need blocks or support under the hands until the full split is achievable.
Do 2 to 3 sets of 30 to 60 seconds at the end of a training session or in a dedicated mobility routine three to five times a week. It is a long term flexibility goal for the adductors and hamstrings, so consistency over months matters far more than any single hard session.
Start with the hands on blocks or a chair so the upper body is supported and the hips can relax, and hold at mild to moderate tension only. Progress by lowering the blocks, holding longer, or adding a light pelvic tilt forward. The most common fault is forcing depth and tensing the adductors in response; fix it by backing off to a level where you can breathe slowly and the muscles let go.
It stretches the adductors on the inner thigh most, along with the inner hamstrings and the groin. The hip joint capsule and glutes also adapt over time.
Most adults need several months to over a year of consistent stretching three to five times a week. Progress depends on your starting flexibility, age, and how often you train it.
Only if the toes roll forward and the knees take the stretch instead of the hips. Keep the kneecaps pointing at the ceiling and the knees straight but not locked hard.
Daily light holds are fine and often work best, but intense sessions should be limited to three or four times a week so the adductors recover. Stop any session if you feel sharp pain.
Log your side split sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.