How does a human lift a weight? Can we relate the dynamics of the lift to the molecular actin-myosin interactions responsible for muscle contraction? We address these questions with bench press experiments that we analyse with a theoretical model, based on the sliding filament theory. From the agreement, we show that there is a link between the dynamics of a gesture at our macroscopic scale and the physiological processes at micro/nanometric scale. And we use this link as a non invasive tool to reveal physiologic characteristics of muscles of people revealing their myotypology (slow/fast twitch fibers) or possible deseases.