So often training is about repetitions. Pick up a weight, do some repetitions. Jumping jacks for 60 seconds, as many repetitions as you can manage. Reps, reps, reps. But you can train without repetitions. Its called isometric training, its a great strength builder, and it adds a bit of variety to your usual training regime. Its really very simple, all you do is hold yourself in position.
When maintaining a static hold, your muscles accumulate “time under tension.” You can feel your muscles working, and draining of energy. I also like the mental focus, it creates a muscle to mind connection as you struggle to keep yourself in place. Also, because you’re not moving, you’re not putting movement pressure through your joints. With repetitions, you can sometimes cheat the movement by letting the momentum carry you through, you’ll have no such help with a static hold.
Isometric training, a good to addition to any workout routine. Below are a few examples.