Entrenador dando instrucciones de entrenamiento en el gimnasio . - Foto e imagen de stock

Young adults doing powerlifting on machines in fitness clu

Sport, fitness, lifestyle, technology and people concept - men with personal trainer exercising on treadmill in gym

Sport, fitness, equipment, technology and people concept - men with tablet pc computer exercising on gym machine

Sport, fitness, equipment, technology and people concept - men with tablet pc computer exercising on gym machine

Sport, fitness, lifestyle, technology and people concept - men with personal trainer exercising on treadmill in gym

Group of young people running on treadmills in a fitness center

Young man training in the gym.

Young sporty man portrait working out in the gym preparing wheights for squats. Concept of active lifestyle.

Young man lifting the barbell in the gym with instructor.

Group of sporty young friends portrait working out in the gym. Concept of active lifestyle.

Young sporty woman portrait working out in the gym with dumbbel. Concept of active lifestyle.

Young man exercising with dumbbells in a gym, focus on the weight

Young sporty man portrait working out in the gym. Concept of active lifestyle.