Warm footbath before bed,
does it really help with Improved subjective sleep quality in older adults with sleep problems?
research showsThe grade is C with 50 points. The 2025 meta-analysis contained 950 participants across 18 studies, whereas the two directly examined trials enrolled 46 and 15 participants, 61 in total. Pooled subjective sleep was positive, but objective sleep time, efficiency, and latency were not significant.
ads claimFootbath appliances sold in Korea advertise temperature control, timers, and massage, but this evidence concerns plain warm-water immersion and sleep, not electrode-based ionic detoxification. Verdict 2339 is D with 30 points for ionic footbath toxin removal, a different intervention and endpoint.
Useful facts when choosing a product
- A representative trial immersed the ankles to 10 cm in 41-42 degrees C water for 20 minutes one hour before usual sleep every night for six weeks.
- The comparator was no footbath rather than a room-temperature footbath, leaving temperature sensation, ritual, and attention uncontrolled.
- Pooled subjective sleep scores improved, while pooled objective polysomnography and actigraphy did not.
Chamgap Semantic Classification Code
Candidate index · review held
UNK.warm-water-footbath-at-38-42-degrees-c-about-before-bedtime.UNK.subjective-sleep-quality-with-sleep-problems.improve.UNKUnknown > warm-water footbath at 38-42 degrees C about before bedtime > Unknown > subjective sleep quality with sleep problems > Improvement claim > Unknown
An automated migration candidate, not an issued permanent code; exact claim scope remains under review. This machine-generated migration candidate helps retrieval but is not a permanent assignment. The original verdict ID and URL remain authoritative.
What the research actually shows
The 2025 systematic review included 950 participants across 18 studies and pooled subjective sleep scales from 13 studies. That 950 is the meta-analysis-wide sample, not the sample of one decisive direct trial. The directly examined Seyyedrasooli randomized trial enrolled 46 participants and the Liao crossover study enrolled 15, for 61 in total. Two avoidable defects remained. First, the positive trial used no footbath rather than a feasible active comparator such as room-temperature immersion or a neutral bedtime ritual. Second, objective measurement with polysomnography or actigraphy was feasible, but the positive Seyyedrasooli trial relied only on a self-reported PSQI endpoint. The 15-person Liao study did not show a large objective or subjective sleep effect. The 2013 paper reported support from Tabriz University of Medical Sciences.
Why this is classified as C (50)
The meta-analysis-wide 950 participants were distinguished from the two direct trials of 46 and 15 participants, 61 total. Lack of an active comparator and reliance by the positive trial on self-report alone despite feasible objective measurement are two avoidable defects, giving B2 and C with 50 points.
Counterpoint. Objective sleep measures did not improve. This verdict concerns plain warm-water immersion and sleep, unlike verdict 2339 on ionic footbath toxin removal.
Rejudgment record. Cross-check applied — Meta-analysis-wide 950 participants versus 61 in two direct trials, null objective measures, no active comparator, and self-report-only positive trial
| Endpoint | P | Symptom or function itself is the target - including patient reports and performance tests |
| Replication | R1 | Single confirmatory trial |
| Independence | I1 | Mixed funding sources |
| Effect size | E+ | Meets the clinically important threshold |
Stored derived and displayed grades match; this is not a current recalculation or validity check (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Improved subjective sleep quality | C | Pooled SMD was -0.76, but evidence was dominated by small unblinded studies. |
| Improved objective sleep time, efficiency, and latency | D | Pooled polysomnography and actigraphy results were not significant. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Chang et al. 2025 systematic review and meta-analysis | Systematic review and meta-analysis of footbath studies in older adults | Eighteen studies with 950 participants overall; 13 studies in the subjective-measure meta-analysis | The article's Funding section could not be verified in the accessible text | Subjective sleep scales and objective polysomnography or actigraphy | Subjective SMD -0.76, 95% CI -1.22 to -0.29; objective sleep time, efficiency, and latency were null | Synthesis of the evidence base |
| Seyyedrasooli et al. 2013 | Randomized no-footbath controlled trial | 46 participants, 23/23, all reported | Sponsored and supported by Tabriz University of Medical Sciences | PSQI total and components; no explicitly labeled primary endpoint verified | Total score 7.30+/-0.68 to 4.13+/-3.57 versus 4.69+/-0.51 to 5.69+/-3.08; between-change P=.02 | Representative small RCT |
Receipt — 4 References
All 4 cited sources were verified for existence at the original page (as of 2026-08-07).
Final verification and publication gate: Codex · Evidence date: 2026-08-07 · Corrections: none
Cite this verdict
[Chamgap] Warm footbath before bed x improved sleep quality in older adults — Evidence Grade C·50. 4 cited sources checked. Source: https://chamgap.com/en/verdicts/sleep/warm-footbath-before-bed-older-adult-sleep-quality/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.