If you want to get better results during your "time exercises" - RANDOM STOPWATCH / TIMER is your BEST CHOICE.
Training with the same weights after some time does not give results. The same applies to training on time. This stopwatch allows you to determine a random time of the exercise. Thanks to this your body never knows how long it takes to train and is not able to get used to the effort.
Enjoy your exercises in a new better way !!!.