Arnold sought out alternative exercises that worked a target muscle from slightly different angles. When using dumbbells rather than the barbell on overhead presses, for example, he deliberately lowered the weights several inches below the bottom position of the barbell movement, and he brought them together at the top to elongate the range of motion.
If someone else wants to use the equipment too, you can offer to let them “work in with you” – which means they do their sets while you rest, and vice versa. If you’re not comfortable with this (and chances are for your first few workouts you won’t be), it’s okay to say no or not offer. If you say no, be nice about it. Say something like “I’m almost done, just one more set and it’s all yours!” If you are comfortable with it, usually you and the other person will work together to change the weights in between each set.
If this happens, the key is to not delve into what psychologists call catastrophising, or thinking the worst. Just because you cheated on your cut, don’t tell yourself, “Okay I’ll get back to my diet tomorrow / 3 days from now / next week.” This kind of thinking will mean repeated cheat meals until you get back on track. Forgive yourself for the mistake and then get back on your cutting diet.

When lifting it is essential to focus your mind completely on the muscle group you are attempting to work on. This makes sure that you are actually using the target muscle to lift the weight rather than accessory muscles or even momentum. This skill will develop with time, and as you progress in making that mind to muscle connection, your workouts will become much more productive and efficient.