When skeletal muscles are trained by adding physical stress to them this is called?

When skeletal muscles are trained by adding physical stress to them, this is called resistance training. Resistance training is a type of exercise that involves the use of force or resistance to build muscle mass and strength. It can be done with weights, resistance bands, or even body weight exercises. Resistance training is an important part of any fitness program, as it can help to improve muscle strength, endurance, and power. It can also help to improve bone density, reduce body fat, and improve overall health.