Helder 2 lower back protocol — 20cm · 20 min · body mode

Device Helder 2 (AriHelder)
Distance 20 cm — arm mount
Mode Body mode · full power
Duration 20 min per session
Frequency Daily or 5× / week
Wavelengths 631 nm red · 856 nm NIR
✓ OHSP Verified Verified output: 10.47W total — NIR 9,242 mW + Red 1,228 mW. Independent integrating sphere measurement →

How to position the device

The Helder 2 is a distance device. Unlike on-skin wearables, it operates from a defined working distance — 20 cm — using the included arm mount. Incorrect distance is the single most common user error with distance PBM devices.

1

Set up the arm mount

Attach the Helder 2 to the arm mount. Position the arm so the device face is 20 cm from the lumbar region of your lower back. Sit, lie, or stand — whichever keeps the 20 cm distance stable for 20 minutes.

2

Select body mode at full power

Set the Helder 2 to body mode, full power. Verified output: 10.47W total — NIR 856nm: 9,242 mW · Red 631nm: 1,228 mW. Do not use head mode for lower back — head mode runs at half power and is reserved for face, scalp, and thyroid applications.

3

Run the session

Hold the position for 20 minutes. Wear appropriate eye protection. Do not look directly at the LEDs. The arm mount keeps the session hands-free throughout.

Session guidance

Consistency matters more than any single session. Daily or five sessions per week is the standard Helder 2 lower back protocol. Most users report noticeable improvement within two to four weeks of consistent daily use.

Morning or evening — there is no evidence that time of day affects efficacy for musculoskeletal targets. Choose what you can maintain.

Safety & contraindications Do not use in body mode over open wounds, active infection, or tumour sites. Avoid use directly over the abdomen during pregnancy. Always wear eye protection — never look directly at the LEDs. If you are on photosensitising medications, consult a practitioner before use.

Frequently asked questions

20 cm is the standard working distance for body mode. Use the arm mount to maintain this hands-free throughout the session. Too close increases irradiance beyond protocol range; too far reduces it below effective dose.
20 minutes per session in body mode. Sessions shorter than 10 minutes or longer than 30 mi