It is defined as "the capacity [maximum amount that can be contained] to resist strain or stress".
Strength is what each person strives to achieve as we journey through life with varying forms of what the end goal is.
If you have been exposed to the fitness world in any form you will note the truth in that statement. The fitness industry has put out products for "strength" such as Dancing to the Oldies with good ol' Richard Simmons, Denise Austin's Buns of Steele, to today's Crossfit and HIIT programs.
Despite these diverse avenues to achieve "strength", there is one key factor that must be applied.
When you think of training, likely you block out an hour of time to go to the gym, sweat it out, shower, and move on with your day. While this is the norm, it isn't necessarily the best practice especially given the fact most people spend the other 23 hours of life being sedentary.
This is where the concept of grease the groove (GTG) comes in. Originally termed by StrongFirst founder Pavel Tsatsouline in his book Power to the People, GTG is where you practice a movement you seek to be stronger in multiple times a day.
What you think of yourself plays a huge role in what you are capable of. I see this in the gym quite often and I see a lot of coping mechanisms at play too making lifting weights more than just picking something up and setting it down, it is a battle of strength, courage, and mental fortitude. All of these factors eventually bring me, as your trainer, to ask you the question, "are you able to do this?"