Skip to content

Heat suit training increases hemoglobin mass in elite cross-country skiers.

PMID 35305278 (2022): heat, suit — Performance in heat (study note for endurance athletes).

Last updated/Feb 23, 2026, 11:13 PM

Study note • PMID 35305278

Heat suit training increases hemoglobin mass in elite cross-country skiers.

Scandinavian journal of medicine & science in sports2022 • DOI 10.1111/sms.14156
Evidence C60/100
Action 2: Consider

Worth trying if it fits your goal and context.

ELI5

In plain language

The primary purpose was to test the effect of heat suit training on hemoglobin mass (Hb(mass) ) in elite cross-country (XC) skiers. (controlled study; n=13 elite participants).

The abstract suggests a positive effect on Performance in heat under the tested conditions. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.

Takeaways

What the abstract suggests

  • Study question: The primary purpose was to test the effect of heat suit training on hemoglobin mass (Hb(mass) ) in elite cross-country (XC) skiers.
  • The abstract suggests a positive effect on Performance in heat under the tested conditions.
  • Population: n=13 elite participants.
  • Protocol cues (title/abstract): 50 min.

Protocol

Protocol (as reported)

  • Intervention/exposure: heat, suit (vs control group).
  • Dose/time/duration cues in abstract/title: 50 min.
  • Outcomes: Performance in heat.
  • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.

Fit

Who it helps, and who should skip it

Who it helps

  • Athletes similar to the study population (n=13 elite participants) working on heat.
  • Athletes who can measure Performance in heat with a repeatable workout or time-trial effort.

Who should skip

  • If you have symptoms or conditions that make the intervention risky, get professional guidance.
  • If you’re near race day and can’t safely test, defer the experiment.

Methods

What the study actually did

  • Design: controlled study.
  • Population: n=13 elite participants.
  • Comparator: control group.
  • Outcomes measured: Performance in heat.
  • Protocol cues mentioned: 50 min.
  • Source: PubMed PMID 35305278 (2022) — Scandinavian journal of medicine & science in sports.

Results excerpt

What the abstract reports

HEAT led to 30 g greater Hb(mass) (95% CI: [8.5, 51.7], p = 0.009) and 157 ml greater red blood cell volume ([29, 285], p = 0.018) post-intervention, compared to CON when adjusted for baseline values.

Note: excerpts are short; for full context, read the paper.

Limits

Limitations & bias

  • Abstract-only summaries can miss critical details (population, protocol, adherence, and context).
  • Single studies often don’t generalize to your event, history, and training load; treat results as a starting point.
  • If your context differs (elite vs recreational; cycling vs running), adjust expectations and be conservative.
  • This is performance information, not medical advice.

Coaching beta

Get a plan that adapts to your life.

Join the 26weeks.ai TestFlight beta for adaptive coaching, recovery-aware adjustments, and race-week reminders.

Keep going

Sources