Training platform Runna has announced new features intended to let runners better adapt to hot weather.

Adapt to Heat is a new set of features available within the Runna platform that lets subscribers tailor their training to changing — and increasing — outdoor temperatures.

Runna will show a color-coded time chart to indicate when it’s best to head out for a run to avoid peak temperatures. And changes to Runna’s algorithms will slow structured workout paces down in hot weather to help better-balance perceived, and actual, exertion during a workout.

Strava , which owns Runna, has also released some data that shows people have already altered the timing of their sessions, as well as leaving outdoors running for other pursuits this year.

Based on UK user stats, Strava says it saw a 32 per cent increase in pre-7am workouts during the recent June heatwave. Indoor activities also went up 12 per cent, while running activities in general went down by 16 per cent, offset in part by a 14 per cent increase in biking sessions.

All of this is largely in line with what one might intuitively expect, but the Adapt to Heat initiative should help those in active run training feel less blindsided by heatwaves, which are only set to become more common.

Runna isn’t the only fitness tech player that actively recognizes higher outside temperatures. Higher-end Garmin watches have done since 2019 with a stat called Heat Acclimation.

This registers a percentage acclimation score, racked up when you train in ambient temperatures of 22 degrees centigrade or higher. In classic Garmin fashion, though, there’s no overt pandering to the wearer for heat, but you will get some of the same effect by having heart rate rather than pace as the core structured workout metric.

Other features coming soon to Runna include Upcoming Plans, which lets the more organized or ambitious runners work out plans for multiple events and training blocks throughout the year. Post-event recovery plans for coming too — both of these updates are due in August.

Runna launched in the UK in 2021, and its acquisition by Strava was announced in April 2025. Runna is a paid platform that comes with a $19.99 a month subsription attached. Alternatively, you can pay $119.99 a year.