Doing all your weekly weightlifting in just one day can still make you stronger and fitter, even if you've never worked out before. This means you don't need to train multiple times a week to see real results, as long as you do a full-body routine.

Doing short, simple strength workouts just twice a week might be enough to build muscle and get stronger — even if you're already used to longer, more intense routines.

Doing just one set of strength exercises a few times a week can still build significant muscle strength and improve daily physical function, whether you are new to working out or already experienced. Cutting down on the number of sets does not stop your muscles from getting stronger as long as you are working the big muscle groups.

If young guys lift weights all over their body 3 times a week for 9 weeks, they'll get stronger — no matter if they switch up their exercises or stick to the same ones.

If you take a one-week break from lifting weights halfway through a 9-week workout plan, you might lose a little bit of your strength gains in your legs, but your muscles won’t shrink any more than if you kept going, and your endurance and power won’t be affected.

If you're someone who's been lifting weights for a while, splitting your workouts into 2 days a week works just as well as doing them 4 times a week — as long as you're doing the same total amount of exercise over time.