Learn stemming in bouldering: place feet and hands on two opposite surfaces, press outward and save strength in corners. Step by step with clear milestones.
Stemming means placing feet or hands on two opposite surfaces and pressing outward so the counter-pressure holds you. It works in corners, dihedrals and between volumes. The honest answer to "Can I really rest like this?": yes, with the right pressure you can stand in a good stem almost without grip strength. Whoever masters it gains a rest in the middle of the route. It is especially useful in gyms with volumes and corners, where surfaces face each other.
The German Alpine Club (DAV) describes "Stützen und Spreizen" (propping and stemming) in its bouldering glossary like this: you stand with legs wide apart, one leg on each side of the wall, and push yourself upward with your hands on the holds [1]. Sports science lists "stemming" as its own technique that exists both frontal and rotated [2]. Together with stepping, rocking over and hooking, it counts in that systematization among the pushing actions used mainly to initiate movements, not just to stabilize [2].
Expect it to take a few sessions until you feel the right pressure (an experience value, not a measurement).
Entry criteria (practice standard):
Look for two surfaces facing each other. Put your feet on both sides and press outward. Your hands stay on holds at first.
Milestone: You stand in the stem for ten seconds without a shoe slipping.
Place your palms on the surfaces and brace outward. That relieves grip strength. The pressure comes from the whole body, not just the arms. Feel how the shoulders go slightly forward and the elbows open, and keep the arms long rather than bent.
Milestone: You stand for ten seconds with hands and feet pressing.
Move one foot up at a time while the other foot and hands maintain pressure. The pressure stays constant, otherwise you sag. Move only one contact point at a time and let the other three work.
Milestone: Three moves in a row without sagging.
In a stable position you release one hand and shake it out. That is the favorite job of a stem: a rest without stepping down.
Milestone: Twenty seconds of rest on one hand.
Go from the stem back onto normal holds and keep climbing. Decide on each move whether the pressure or the holds carry better.
Milestone: You climb an easy boulder with a stemming section.
A stem can fail suddenly: if a shoe slips, the pressure disappears and you lose your hold. Practice at jump-down height, keep the landing zone clear and fall under control. Wide steps load hips and knees; in a case series of 77 acute knee injuries in climbers and boulderers, the high step was responsible for about a fifth of the cases [3]. A case series says nothing about risk per move, but it shows where knees suffer. In a Munich hospital cohort of 430 boulderers, 61 percent of the injuries were in the lower extremity [4]. Warm up and increase the width slowly. This guide explains and motivates but does not replace supervised training. Have a coach show you falling technique and mat rules.
Build foot pressure first, then the hands. Feel how the pressure comes from the hips and only then release one hand. This is practical experience and not proven, but it prevents the sudden sag when you release a hand too early.
Stemming means placing feet and hands on two opposite surfaces and pressing outward so the counter-pressure holds you. It works in corners, dihedrals and between volumes [1].
In corners, dihedrals and wherever two surfaces face each other. There you can save strength, rest or gain height without holding on to small holds.
Place both feet flat on the surfaces, press outward, add the palms and build the pressure steadily. Move up a foot only when the other foot and the hands maintain pressure.
Usually the outward pressure is missing, or the shoe isn't flat on the surface. Bring your hips slightly forward, press the sole flat against the wall and move only one contact point at a time.
Wide steps load hips and knees [3]. Warm up, stem only as wide as is comfortable and increase the width slowly.
Downclimbing: Get Down Safely Instead of Jumping