A Squat to help a squat?
A lot of people think that if you do an exercise at the gym that is similar to what you do outside of it, that it will transfer over and help you do that outside thing better. “If you gain a lot of Strength in a similar movement at the gym, it’ll make it so much easier with whatever comparable thing you are doing outside of it.” While this is true to an extent, it is only going to help so much.
Take Squats for example. Squats often get compared to a lot of outside activities because they ARE similar. You might squat down and pick things up a lot throughout the day, perhaps at work or around the house. I know I have done Squats with this in mind. I knew machines would help my Legs, but Squats would apply to the other stuff more. This is in a way true because of all the different muscles that work together, and cause your body to improve on sending the various signals to contract these muscles and rush the blood around to where it needs to go.
Even isolation exercises are going to make those muscles more helpful in other moves using them though. A stronger muscle is a more functional muscle. It can push out more effort if it is stronger and help more with any action using it. You are able to work each muscle by itself (though not truly) OR with other muscles and still receive benefits both synergistically and individually. A squat at the gym might carry over well to a squat outside of the gym, but just making all the muscles involved stronger will too, despite how you train them. The struggle is getting good at having the muscles work together, which takes a compound type of movement.
Regardless, a lift outside of the fitness center is going to be different no matter what. An object might have greater dimensions, or perhaps just be harder to hold onto. Nothing will completely transfer over, but it can still help.