composite image of instructor with fitness class performing step aerobics exercise

20s 30s abstract action active activity adult aerobics athletic attractive background beautiful blue body care caucasian class club copyspace design equipment exercise exercising female fit fitness flexibility flexible glowing group gym happy health healthy instructor leisure lifestyle light male man mid motion out physical pink pretty room shape shapes slender slim slimming smiling sport sportswear sporty standing step stepping strength stretch stretching studio toned train trainer training vitality wellness woman working workout young