Seeing 0 for the deep sensor in Practice Lab? You're not alone — and it’s actually a great sign!
Let’s clear up a common point of confusion: the deep sensor and your deep pelvic floor muscles are two very different things. Here’s what’s really going on and how you are training those deeper muscles effectively.
Understanding the two sensors in your Perifit Care(+) device
Your Perifit Care(+) probe has two sensors, each with a specific role:
🟢 Bottom sensor (previously called superficial sensor)
Located near the vaginal opening
Measures pelvic floor contractions
Shown as the green line in Practice Lab
🔴 Top sensor (previously called deep sensor)
Located deeper in the vagina, near the cervix
Measures intra-abdominal pressure
Shown as the red line in Practice Lab
👉 So if you're consistently seeing “0” for the red line, it simply means the sensor isn’t picking up abdominal pressure — which is actually a good thing!
What’s the goal in Practice Lab?
Your objective is to:
Raise the green line → This shows your pelvic floor is contracting
Keep the red line low → This means you're not overusing abs, glutes, or breath-holding
A green-up, red-down combo means you're contracting your pelvic floor muscles in isolation — and that’s exactly what we want!
What about the deep pelvic floor muscles?
The pelvic floor has two main layers of muscles:
Superficial layer: More fast-twitch fibers — great for quick, strong contractions
Deep layer: More slow-twitch fibers — essential for endurance and stability
The good news?
Your Perifit training is designed to target both layers by combining:
Short, quick contractions → Engage fast-twitch fibers in both layers
Longer, endurance contractions → Engage slow-twitch fibers in both layers
So even though the deep muscles aren’t directly measured, you are absolutely training them through a well-rounded program.
In Short
The top sensor ≠ deep pelvic floor muscle readings
The green line is your best guide to pelvic floor activation
A low red line usually means good form
And the variety in your training ensures you’re targeting both layers of the pelvic floor