Wall Sit
Isometric squat with the back on a wall — pure quad burn.
Execution
- Stand with the back flat against a wall, feet about hip-width, one stride forward.
- Slide down the wall until the knees are bent to 90°.
- Thighs parallel to the floor, knees stacked over the ankles.
- Hold the position — pressure even on both heels, abs lightly engaged.
Tips
- Beginners: 3 × 20-30 s; advanced 3 × 60-90 s.
- If knees complain, keep the hips slightly higher — 90° is not mandatory.
Isometrics with a noticeable effect
The wall sit is an isometric exercise: the muscles work without shortening. That sounds like less, but it has two concrete advantages. First, it fatigues the quads without any joint movement, which often makes it the first tolerable exercise after knee problems. Second, it's precisely dosable through time and knee angle.
Isometric holds also have a well-documented side effect on blood pressure — regular sets of one to two minutes lower it measurably.
Execution
Slide down the wall with the back flat against it until the upper and lower leg form roughly 90 degrees. The feet sit far enough forward that the knees stay stacked directly over the ankles. The back, shoulders and head stay in contact with the wall; the arms hang loose or rest against it.
Common mistakes
- Resting the hands on the thighs. Removes exactly the load the exercise is about.
- Knees past the toes. Here — unlike in the free squat — a real mistake, because the position is held statically. Move the feet further forward.
- Holding the breath. Especially common in isometric work and unfavorable for blood pressure. Keep breathing calmly.
Programming
Four sets of 30 to 90 seconds with an equal rest. Progress through time, a deeper angle, or single-leg.