Question

Lauren wants to strengthen her core and lower back muscles. She currently performs three sets of six-inch holds for about 10 seconds on each lift. She decides to increase to 15 seconds per lift. This type of change is an example of a(n) frequency change intensity change type change time change

Answer 1

IT IS TIME CHANGE! I just took two different quizes with this and it is indeed time change

Answer 2

The answer is Intensity change. Lauren used this kind of change to improve or to build a muscles in her training in building muscles. If your goal is to build muscle, then you definitely need more (and some individuals grow only if you add even more volume than that). Most of bodybuilding routines nowadays are plain old high-volume training.