Issue #18

A randomized controlled trial registered at Brigham Young University is investigating whether daily Finnish dry sauna therapy can offset the adverse cardiovascular, muscular, and metabolic effects of seven days of severely reduced physical activity in healthy adults. Participants are assigned to one of three groups — maintained activity with sauna, reduced activity with a room-temperature control session, or reduced activity with genuine sauna therapy — with outcomes including vascular endothelial function and exercise tolerance.

NPR science correspondent Will Stone investigates the line between proven medical benefit and wellness hype surrounding sauna use, reporting from an international sauna research congress. The episode examines what the current body of science can and cannot yet confirm about heat therapy's health claims.

A comprehensive umbrella review published in Sports Medicine – Open synthesized fifteen systematic reviews covering 161 unique primary studies and more than 3,200 participants to produce the most complete assessment to date of post-exercise cold-water immersion. The review maps specific conditions under which cold immersion aids recovery and circumstances where it may be counterproductive.

A U.S.-based practitioner reviews the current research on what deliberate cold exposure — including cold plunges and cold showers — actually does to the nervous system, stress hormones, and inflammation levels. The piece distinguishes findings that hold up under scrutiny from claims that remain overstated.

Major athletic and wellness brands are shifting their focus from performance optimization to recovery, investing in products tied to sleep quality, HRV, and nervous system support. The trend reflects a broader industry pivot in which heat and cold therapies, alongside wearable tracking, are becoming central to consumer wellness routines.

A deep-dive feature examines how U.S. and Canadian retaliatory tariffs are straining the deeply intertwined lumber and trade relationships between Maine and New Brunswick, affecting cross-border lumber businesses that have operated for generations. A 25% Canadian counter-tariff on U.S. lumber is now making cross-border trade significantly harder for established producers on both sides.

Canada has escalated its challenge to the U.S. antidumping methodology applied to softwood lumber, filing a notice of appeal with the U.S. Court of Appeals for the Federal Circuit after the Court of International Trade upheld the Commerce Department's price-comparison test. The dispute centers on a calculation method that Canadian producers argue produces arbitrary results across the vast majority of their American sales.

Canada's counter-tariffs, which took effect September 8, introduced rates of 15%, 25%, and 50% on specified goods covering roughly $27.6 billion in U.S. imports, with construction materials including steel, lumber, and fasteners now facing pricing and availability uncertainty. The Alberta Construction Association flagged the development in its September newsletter and is collecting business input on tariff impacts.

The U.S. Commerce Department reached its one-year deadline to report to President Trump on hardwood timber and lumber imports, a step that could trigger a new national security tariff on hardwood products currently spared by the existing 10% softwood duty. Canadian mills already operating under layered anti-dumping, countervailing, and Section 232 duties now face the prospect of additional measures on hardwood as well.

A coalition of Canadian lumber producers led by the federal government is appealing a U.S. dumping determination that found significant price gaps across more than 99% of major Canadian mills' American sales by value. The case challenges the Commerce Department's price-comparison methodology, which the U.S. rejected in a prior steel nails dispute for ignoring market-specific price variation.

October 1 marked a Commerce Department reporting deadline on hardwood imports under a 2025 presidential proclamation, arriving at a moment when Canadian softwood producers are already shipping into a U.S. market where anti-dumping, countervailing, and Section 232 tariffs can stack simultaneously. The report is a decision point, not an automatic tariff trigger, but it adds further uncertainty to an already complex and costly North American lumber trade environment.

Lumber futures fell to $527 per thousand board feet, their lowest point in two years, as climbing mortgage rates — reaching 7.3%, a three-year high — suppressed housing demand and broader bond market volatility reinforced higher-for-longer interest rate expectations. Canadian counter-tariffs of 25% on U.S. lumber and 50% on plywood are providing a partial offsetting pressure on prices.

CME lumber futures closed at $538 per thousand board feet for the week ending September 25, 2026, up fractionally from the prior week but 9.4% below year-earlier levels, with daily closes ranging only $3 across the entire week. Trading volume averaged 330 contracts per day, running 56.6% below the 12-week baseline.

Madison's Lumber Prices Index held flat at US$505 per thousand board feet for the week ending October 2, 2026, unchanged from the prior week but down 4%, or $20, from one month ago. The index tracks a weighted blend of Western Spruce-Pine-Fir, Eastern Spruce-Pine-Fir, Douglas fir, and Hem-Fir based on North American production ratios.

Western Spruce-Pine-Fir 2×4 benchmark pricing slipped to US$472 per thousand board feet in the week ending September 18, down 2% week-over-week, with demand described as just-in-time buying for immediate needs only and little interest in restocking inventory. Freight costs emerged as a new pressure point, with diesel reaching levels not seen recently and sellers warning that last-minute orders risk being eclipsed by sharply rising fuel surcharges.

Mid-year timber price reports from Kentucky and Ohio show stumpage down 15–29% for most major species since last fall, while national diesel prices set an all-time record of $6.529 per gallon in the week of September 21 before easing slightly. The Federal Reserve's quarter-point rate increase pushed the 30-year mortgage above 7%, adding further strain to lumber demand from the housing sector.

Madison's Lumber Price Index put framing lumber at $506.76 per thousand board feet as of September 25, 2026, down 1.8% week-over-week and 2.8% month-over-month, though still 4.5% above year-earlier levels. The National Association of Home Builders is advocating for a long-term Canada tariff deal and expanded domestic timber sales from federal lands to address persistent cost pressure on residential construction.

The American Iron and Steel Institute and the Steel Manufacturers Association warned Commerce Secretary Howard Lutnick and the U.S. Trade Representative that South Korean steel imports are surging across multiple product categories despite existing Section 232 tariffs, with long-product imports hitting a record 145,300 tons in July 2026, a sixfold increase from July 2024. Industry groups are urging the administration not to ease the tariffs, citing $47 billion in announced domestic investment tied to the current tariff structure.

The White House temporarily reduced Section 232 tariffs on selected agricultural equipment and HVAC components containing steel and aluminum from 25% to 15%, with broader modifications across several industrial product categories running through December 2027. The adjustments are designed to ease near-term cost pressure on downstream manufacturers while continuing to encourage domestic metal supply chain investment.

Dry van all-in spot rates rose to $3.01 per mile for the week of September 20–26, with fuel surcharges driven by diesel hitting $6.529 per gallon — the highest weekly EIA reading on record going back to 2007. Linehaul rates were essentially unchanged while fuel accounted for the entire increase in all-in van rates, a dynamic that directly affects the cost of shipping large building materials.

September freight data showed spot rates recovering across dry van, reefer, and flatbed after an August correction, with contract rates continuing to climb and capacity remaining tight heading into Q4. Freight demand produced its first meaningful positive signal in more than three years, though rates have risen faster than demand for most of 2026.

Diesel prices have been rising faster than crude oil due to diesel-specific supply constraints, with U.S. distillate inventories projected to remain below five-year lows through much of 2027 amid strong export demand and reduced global refinery output. The International Energy Agency has described the global refining system as stretched to the limit, with freight carriers unable to fully recover the latest diesel increase in their spot pricing.

FinnFunn's Sauna Village will operate wood-fired bathing sessions at The Inn at East Hill Farm in Troy, New Hampshire, on October 23–24, 2026, as part of a broader Finnish cultural weekend running October 23–25. Two sauna operators are hosting both private group sessions and open community sauna rounds during the event.

A U.K.-based initiative called For Brothers That Talk uses communal sauna sessions to create a low-barrier environment where Black men can openly discuss mental health, substance use, and personal struggles. Founder Michael Gyambibi started the program after observing how the heat and intimacy of the sauna space consistently encouraged candid conversation among strangers.

GQ profiles the Aufguss World Masters competition, where practitioners from around the world perform choreographed towel-waving, scent, and theatrical routines inside saunas for judged competition. The piece follows a U.S.-based competitor through the event and explores how the Aufguss tradition is gaining traction in the American wellness market.

Sauna operators across the West of England report a rising trend of people using sauna sessions for first dates and spontaneous social connection, with owners attributing the phenomenon to the heat's ability to lower inhibitions and reduce reliance on phones and alcohol. Some venues are now considering structured speed-dating events to meet growing demand for sauna as a social space.

The eighth annual Sauna Fest at Therme București runs October 5–25, featuring more than 800 Aufguss shows created by over 100 masters from 29 countries, all included in the standard day pass. A ten-day Sauna Village component showcases equipment and product exhibitors alongside the performance programming.

The Global Wellness Summit covered the International Sauna Congress held in Oslo, where scientists and practitioners gathered to examine heat exposure as a growing global tool for wellbeing and combating social isolation. NPR's Will Stone attended the congress and reported on the state of evidence behind sauna's health claims for a U.S. audience.