Is it safe to?Reviewed: Jan 25, 2026~1 min

Is it safe to use a treadmill during a thunderstorm?

Short answer

⚠️Depends / use caution

It depends. Using a treadmill near storm-exposed windows during a thunderstorm may be unsafe, especially if outlets are not protected and water intrusion is possible.

Context

People worry about electrical hazards and potential for equipment damage or personal injury when exercising during storms, especially in home gyms with older wiring or windows vulnerable to leaks.

When it might be safe

If windows are well-sealed and cannot leak
If treadmill is plugged into GFCI-protected outlet
If surge protector is used and wiring is up to code

When it is not safe

Non-GFCI outlets increase risk of electrical shock
Rain may leak through window and reach outlets or treadmill
Thunderstorm-related power surges can damage treadmill
Old wiring may provide inadequate protection

Possible risks

Electric shock from water contacting outlets or treadmill cords
Equipment short-circuit or malfunction due to moisture
Increased fire hazard from electrical faults
Personal injury from treadmill stopping suddenly if power surges

Safer alternatives

Wait until storm passes before using treadmill
Move equipment away from windows during storms
Install GFCI outlets in garage or basement gyms
Use battery-powered fitness equipment during adverse weather

Bottom line

If water could reach electrical outlets or your treadmill, it’s best to wait out the storm or move equipment. Upgrading to GFCI outlets, checking window seals, and using surge protectors can help, but heavy rain and exposed setups in older homes still present real risks.

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