What is a sensible starting dose for the sissy squat isometric hold?

Start with 2 sets of a 10 to 15 second hold using a firm support for balance, and treat a pain-free, controlled bodyweight sissy squat for reps as the prerequisite before you try holding it statically. Add five seconds per week rather than removing the support early.

How do I make the sissy squat isometric hold easier or harder?

To make it easier, hold onto a doorframe or rack with both hands and stop well short of a full stretch. To make it harder, let go with one hand, hold a light weight against your chest, or extend the hold time once your knees have adapted to the position.

What is the sissy squat isometric hold good for and who should avoid it?

It builds knee-extensor strength and tendon resilience at a long muscle length that few other exercises reach, which suits advanced lifters with healthy, well-prepared knees. Avoid it if you have current knee pain, a meniscus issue, or you cannot yet do a full-range sissy squat for reps without support.

Advanced

Sissy Squat Isometric Hold

By letting the knees travel forward and the torso lean back, the sissy squat isolates the quads and especially loads the rectus femoris in a lengthened position. Holding statically builds knee-extensor strength and tendon resilience but demands healthy knees and good balance. Treat it as an advanced quad finisher and hold a support to control depth.

Equipment: Body Weight
Body part: Quads
Type: Strength
Browse by muscle: Rectus Femoris, Vastus Lateralis
Browse by movement: Knee Extension

How to do it

1
Stand tall and hold a rack or sturdy support for balance.
2
Rise onto the balls of your feet and let your knees travel forward as your torso leans back.
3
Lower until you feel a strong stretch through the front of your thighs.
4
Stop and hold, keeping a straight line from your knees through your hips to your shoulders.
5
Maintain the hold for the target time, then pull yourself back up.

Tips

Keep hips, knees, and shoulders in one line; do not pike at the hips.
Ease into depth over several sessions to let the knees adapt.
Use the support to regulate how much load the quads take, especially early on.

Variations

Common mistakes

The descent happens fast instead of under control, turning a held stretch into a bounce that the knees absorb instead of the quads holding tension.
Coming down onto flat feet instead of staying up on the balls of the feet turns the hold into a wall-sit variation and removes most of the load from the quads.
The knees splay outward as fatigue sets in, which changes the tracking this exercise relies on and can nag the inner knee over time.
Chasing a long hold time in the very first sessions, before the tendons are ready for sustained tension, is how this move earns its reputation for cranky knees.

Frequently asked

What is a sensible starting dose for the sissy squat isometric hold?: Start with 2 sets of a 10 to 15 second hold using a firm support for balance, and treat a pain-free, controlled bodyweight sissy squat for reps as the prerequisite before you try holding it statically. Add five seconds per week rather than removing the support early.
How do I make the sissy squat isometric hold easier or harder?: To make it easier, hold onto a doorframe or rack with both hands and stop well short of a full stretch. To make it harder, let go with one hand, hold a light weight against your chest, or extend the hold time once your knees have adapted to the position.
What is the sissy squat isometric hold good for and who should avoid it?: It builds knee-extensor strength and tendon resilience at a long muscle length that few other exercises reach, which suits advanced lifters with healthy, well-prepared knees. Avoid it if you have current knee pain, a meniscus issue, or you cannot yet do a full-range sissy squat for reps without support.

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