CoachingAnswer

ALTITUDE OR HEAT TRAINING: WHICH IS BETTER FOR ME?

By Anthony WalshRoadman CyclingUpdated 26 May 2026

ANSWER

Altitude training is the more powerful stimulus for red blood cell mass adaptation — elite cyclists gain 3–5% in VO2max from a full 3–4 week camp at 2,000m+. Heat training delivers 70–80% of the same haematological benefit for free, at home, in 10–14 days. For most amateurs, heat training wins on practicality. If you can do altitude, do it — and add a heat block before your event to extend the gains.

KEY TAKEAWAYS

Altitude (2,000m+, 3–4 weeks) is the stronger stimulus for red blood cell mass — roughly 3–5% VO2max gain.
Heat training delivers 70–80% of the same haematological adaptation in 10–14 days at home, at no cost.
The two are complementary — a heat block post-altitude extends and amplifies the adaptation window.
For most amateurs: heat training is the practical choice; altitude is the premium option for those who can access it.

WHO THIS IS FOR

IS THIS YOU?

The rider deciding whether to invest in an altitude camp

You're weighing a Tenerife or Sierra Nevada camp against a home heat protocol. You want a clear cost-benefit comparison.

The rider who has done altitude camps and wants to maximise the return

You're already doing altitude training and want to know how heat fits alongside it for maximum adaptation.

THE ROADMAN VIEW

The honest framework for this decision is practical, not ideological. Altitude training is the gold standard because the research is more extensive and the full haematological response — particularly red blood cell mass — is larger and more durable over a 3–4 week camp. That's why WorldTour teams spend weeks at altitude before Grand Tours, not weekends. The biology is clear.

But the biology of heat training is also clear, and the gap between the two is smaller than most people assume. A 10–14 day heat block gets you roughly 70–80% of the haematological adaptation of a proper altitude camp. For an amateur who can't take two weeks off to ride at 2,400m, that 70–80% is the entire conversation. It's available to everyone, costs nothing beyond time, and can be repeated across the season around key events.

The combination case is compelling if you have access to both. Do the altitude camp — that builds the ceiling. Come home and run a heat maintenance protocol for 2–3 sessions per week — that extends the adaptation. Then run a full heat block 2–3 weeks before your priority event — that re-peaks the gains. You get the best of both pathways, and the altitude investment gives you the most return.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Dan LorangHead of Performance, Red Bull–Bora–Hansgrohe
At WorldTour level, altitude camps remain the primary haematological adaptation tool — live-high, train-low over 3–4 weeks is the protocol that demonstrably raises red blood cell mass most significantly. Heat training is used as a complementary block, typically after altitude, to extend and maintain the adaptation into the race season.
Hear it: 13 Years Of Coaching Pros: What Amateurs Don't Know
Roadman Podcast — heat training analysisRoadman Cycling, coaching pillar
The Roadman podcast coverage of heat and altitude training made the comparison explicit: altitude is the stronger total stimulus but heat training delivers a meaningful fraction of the same adaptation in far less time and at zero cost. For amateurs, the practical answer is that a home heat protocol is often the better decision simply because it's achievable.
Hear it: Remco's Heat Training: Why It Works & How to Gain From It

PRACTICAL APPLICATION

DO THIS WEEK

Choose based on access and event timing
If you can do a 14-day altitude camp (2,000m+) with 2–4 weeks to your event, do it — altitude is the stronger stimulus. If not, run a 10–14 day heat block 1–2 weeks before your event. Both are valid; don't let perfect be the enemy of achievable.
Combine altitude and heat for maximum effect
If you have access to both: complete altitude camp first (3–4 weeks), return home, maintain with 2–3 heat sessions per week, then run a full 10-day heat block 2 weeks before your target event. This combination layers adaptations across both pathways.
Use heat training as the accessible default
For each key event in the season, budget for a 10–14 day heat block ending 7–14 days before race day. This is your baseline performance edge — consistent, repeatable, and free. Altitude camps, when available, are the premium layer on top.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEDismissing heat training because altitude is 'better'.
FIXPerfect is not the option on the table for most amateurs. A home heat block delivers real, measurable adaptation that altitude training, theoretically superior, cannot deliver if you can't access it.
MISTAKEDoing altitude training and then doing nothing to maintain the gains.
FIXAltitude adaptation fades. A heat maintenance protocol post-camp — 2–3 sessions per week in elevated temperature — extends the performance window from the altitude investment significantly.
MISTAKEStacking altitude and heat training simultaneously without managing load.
FIXCombining altitude camp with a daily heat block adds significant physiological stress. These are complements, not simultaneous protocols. Do altitude first, then heat maintenance, then a targeted heat block pre-event.

FAQ

FREQUENTLY ASKED QUESTIONS

Which adaptation is more durable — altitude or heat training?

Red blood cell mass from altitude holds for 3–4 weeks post-camp and decays slowly. Plasma volume from heat training begins reversing within 2 weeks of stopping. Altitude produces a more durable haematological change, which is one reason it remains the preferred option when available.

Can I do heat training instead of an altitude camp if I can't afford one?

Yes — this is exactly what heat training is for. A home heat protocol delivers meaningful adaptation that a significant number of professional teams now use alongside altitude training. As a standalone option for amateurs without altitude access, it's the most cost-effective performance intervention available.

Do the adaptations from altitude and heat training add together?

Largely yes. Both drive plasma volume expansion and red blood cell mass increases, but through somewhat different mechanisms and with different magnitudes. The combination produces more total adaptation than either alone — which is why WorldTour teams use both.

Is there a scenario where heat training is better than altitude?

For events with a specific heat acclimatisation demand — a gran fondo in Southern Europe in July, for example — heat training is the better preparation because it acclimatises your thermoregulatory system directly, not just your haematological system. Altitude doesn't teach your body to sweat more efficiently.

How should I sequence altitude and heat training across a season?

Typical WorldTour sequencing: altitude camp in late spring, heat maintenance through summer, targeted heat block before priority summer races, second altitude camp in autumn for the following season. For amateurs: altitude if available, heat blocks around each key event, heat maintenance between.

Does living at altitude (e.g. in the mountains) mean I don't need heat training?

Living at altitude provides continuous acclimatisation above 1,500m and continuous haematological adaptation above 2,000m. This doesn't replicate the specific thermoregulatory adaptations of heat training. If you're living at altitude and racing in hot-weather events, a targeted heat block is still worthwhile.

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