"Pure strength training" refers to a form of exercise that focuses solely on building physical strength. It involves performing specific exercises that target different muscle groups and progressively increasing the amount of weight lifted to enhance strength and muscle development.
Full definition
This is an excellent 30 days program that you can easily introduce into your current routine if you want to take a break
from pure strength training and move a little more into endurance and conditioning.
Some say this is a nice side effect
of pure strength training, but it's the other way around: Gains in muscle size is necessary to gain a certain level of strength.
If you can only get to the gym 3 days a week, use those days to do
your pure strength training.