New data from connected fitness platform Strava has revealed significant shifts in how athletes have adapted their exercise routines during recent record-breaking temperatures.
With further heatwave conditions expected across the UK and Europe this summer, the platform’s insights show that users pivoted toward early morning starts, indoor facilities and cycling to manage the extreme heat.
As outdoor temperatures rose in recent weeks, many athletes opted for climate-controlled environments. The share of activities completed indoors rose by 12%, alongside an 8% increase in strength-based training routines such as weight training, functional fitness, HIIT and CrossFit.
Outdoor exercisers adjusted their schedules to avoid peak midday heat, driving a 32% increase in the share of activities starting before 07:00. During the peak temperature window, early morning sessions accounted for 14.1% of all UK uploads, compared to 10.6% prior to the warm spell.
The shift to early morning training was mirrored across Europe, where temperatures reached higher averages. Early morning activity uploads increased by 68% in France and 72% in Germany.
The data also highlighted a distinct shift in discipline selection. The overall share of running activities declined by 16%, while cycling activities saw a 14% increase. Strava suggested the rise in riding may be attributed to the cooling effect of higher ambient airflow while cycling compared to running, or athletes substituting hot public transport commutes with a bicycle.
Summary of activity metrics recorded during the June 2026 heatwave period:
- Share of activities starting before 07:00: +32%
- Share of activities that were runs: -16%
- Share of activities classified as indoor (no GPS): +12%
- Share of activities classified as strength: +8%
- Share of activities that were rides: +14%
