Training questions, answered with the research
One question per guide, the answer first, and the studies behind it.
Is the Apple Watch accurate for weight lifting calories?
Not very. In 2026 lab tests the Apple Watch read heart rate well during lifting but put sessions at about double the calories measured.
Lifting with Apple Watch and iPhone
Your Watch, Health and Lock Screen in the gym.
Hypertrophy programming
Sets, effort and progression, from the research.
Rest between sets
How long to rest, and why.