Medically reviewed by Dr Sin Yong · Last reviewed · 3 min read
A muscle-stimulation device such as those built on HIFEM treats a different layer.
Published 10 October 2026 · Reviewed by Dr Sin Yong

4K Body Lift is Dr Sin Yong's high-definition body sculpting protocol on the Secret DUO platform. It uses radiofrequency only, combining insulated-needle RF microneedling with the platform's fractional RF mode for skin tension and texture on the abdomen, flanks, arms and thighs. It does not use EMS or electromagnetic muscle stimulation, and fat reduction, where that is the main problem, is planned separately.
The 4K Body Lift is named on several body pages, each covering a different decision. The protocol page explains the method; the concern pages explain when it is chosen over the other two body protocols and when something else is needed.
A pocket that pinches and a fold that hangs are two different problems; the 4K Body Lift is for the first, and I will not use it to pretend it solves the second.— Dr Sin Yong
Read the concern page for your area first; the protocol page makes more sense once the pinch test has told you which layer is the problem.
Four body terms on this site sound alike and are regularly mixed up in enquiries. Each acts on a different layer.
A useful shorthand: Figure Lift for skin that hangs, 4K Body Lift for fat that pinches, HIFEM for muscle, and surgery for volumes none of these should pretend to handle.
The decision is made in person, not from a photograph. Dr Sin Yong starts with the pinch test on the zone that bothers you.
Where the picture is mixed, which is common on the abdomen after pregnancy or weight change, the protocols are sequenced rather than stacked, and the plan is reviewed as the tissue responds. The consultation process page explains how that assessment runs.
Full page: 4K Body Lift; the needling component on Secret DUO for the body.
No. It is radiofrequency only.
Fat reduction is planned separately; the 4K Body Lift is for skin tension, contour and texture.
US FDA 510(k) summary K170325 — Secret RF (ILOODA Co., Ltd.), 2017: bipolar 2 MHz, needle depth 0.5–3.5 mm in 0.1 mm steps. source
US FDA 510(k) summary K202043 — Secret DUO (ILOODA Co., Ltd.), 2021. source
Chandra S, et al. Physics of fractional microneedle radiofrequency. J Cutan Aesthet Surg. 2024;17:177. doi:10.25259/jcas_98_23 (PMID 39483649). source
The Landscape of Radiofrequency Technology for Skin Rejuvenation. Health Science Reports, 2025. pmc.ncbi.nlm.nih.gov
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