close-up of a young caucasian woman`s hand in the gym uses a sports watch, a black pulse wrist on the back of a treadmill in a sp

active adult app athlete beautiful black brutal button cardiovascular caucasian control daytime exercise exercising female fit fitness gps gym hand health heart hitch hobby lifestyle monitor navigator pulse push rate room running shockproof smart sport sports sportsman sporty standing stopwatch technology timer toned track training treadmill use watch waterless woman workout young