Device to detect hand movement incase if am caught in a distress suitation

Looking for a solution to detect the hand movements (or even speech saying "Help") so that it can sense the suitation and can send a notification that i need help by sharing the whereabouts (GPS coordinates).

If someone tries to kidnap, can we make some gesture, incase if we are not allowed to speak, can we build a system to detect those gestures and could send a notification to concerned Police.

Is that bodily sensor be recommended to capture movements and process the data and send notifications.

May please advice on the feasibility.
Thank you,
Senthilnathan