ArticleJournal of applied physiology (Bethesda, Md. : 1985)2025
Muscle temperature increases during a single far infrared sauna session without changes in intestinal temperature.
Article in Journal of applied physiology (Bethesda, Md. : 1985), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Far-infrared sauna exposure at 65°C elevates core temperature.Experimental physiology · 2026Article
- Heat Therapy: Targeting Health, Disease, and Disability.Comprehensive Physiology · 2026Review
Corrections and comments
- Erratum issued
Authors and funding
5 authors.
Funding
Abstract
Increases in muscle temperature during exercise and passive heating are associated with beneficial outcomes. Far infrared (FIR) saunas are a radiant heating stimulus. It has been claimed that FIR waves penetrate 3 to 4 cm deep into the peripheral tissues, but muscle temperature during FIR sauna bathing is unknown. The purpose was to quantify muscle temperature at three different depths during an FIR sauna session. Ten adults had a multisensor intramuscular temperature probe inserted into the quadriceps muscles before sitting in a FIR sauna for 45 min. Thermocouples were 3.4 cm (deep), 2.4 cm (middle), and 1.4 cm (superficial) below the skin surface. Muscle, core, and skin temperatures, and nude body weight (to calculate whole body sweat rate) were collected before and at the end of heating. Data are reported as (mean [95% confidence intervals]). Muscle temperature increased at the deep (+1.1 [0.3, 1.9]°C), middle (+1.9 [1.0, 2.9]°C), and superficial (+3.0 [1.8, 4.1]°C) depths (all
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.