A client performing a push-up with a 4-3-2-1 repetition tempo spends how many seconds on the concentric phase?

In the context of repetition tempo during strength training, the numbers represent the duration of the concentric, isometric, eccentric, and isometric phases, respectively. In this case, the sequence is a 4-3-2-1 tempo, where:

• The first number (4) indicates the duration of the eccentric phase, which is when the muscle lengthens during the lowering of the body.

• The second number (3) denotes the isometric phase, representing the pause at the bottom of the movement.

• The third number (2) corresponds to the concentric phase, which is when the muscle shortens during the upward push of the body.

• The final number (1) signifies the isometric phase again at the top of the movement, where there is a brief pause.

Thus, according to this tempo scheme, the concentric phase of the push-up lasts for 2 seconds. This understanding is essential because it influences workout planning and clients' ability to control their movements effectively, ensuring proper muscle engagement and technique during exercises.