Running

Running: race preparation and workout analysis

Prepare for your next race with event details, a calendar and prompts to check your history and review each week. Choose an article below to start.

More to explore

Race preparation

São Paulo Marathon

São Paulo Marathon 2027: how to prepare with AI

Prepare for the São Paulo Marathon 2027 with AI. Race details, a calendar and prompts to review your running in ChatGPT, Claude or Gemini.

Read article↗Barcelona Marathon

Barcelona Marathon 2027: start time, course, bib pickup and calendar

Barcelona Marathon 2027 on March 14: 8:30 a.m. start, 6-hour limit, pacers, bib pickup dates and a week-by-week calendar, plus AI prompts to check your own runs.

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Health references

Keep exploring your health data

VO₂ max

VO₂ max chart by age: read your Apple Watch estimate

Compare VO₂ max medians by age and sex, understand the Apple Watch estimate and use your own history to put a change in context.

Read the reference↗Resting heart rate

Resting heart rate: reference ranges and your own baseline

Understand adult resting heart rate ranges, distinguish them from exercise zones and compare Apple Watch records with your own baseline.

Read the reference↗Daily steps

Steps per day by age: evidence beyond 10,000

See what studies say about daily steps by age, why 10,000 is not a universal target and how to compare your own weekly step counts.

Read the reference↗Heart rate variability

HRV on Apple Watch: understand SDNN and your baseline

Understand HRV in milliseconds, SDNN versus RMSSD, measurement context and how to compare your Apple Health history without a universal score.

Read the reference↗

Apple Health → telo → AI

Start with a record you know.

Choose your records on iPhone. Connect your assistant. Check the first read.

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