19 Core-Strengthening Exercises
Have a Weak Core? Here Are 19 Strength Moves You Need to Do, Stat
19
The seated knee tuck "engages and strengthens the innermost core muscle, the transverse abdominus (TVA), that wraps around your torso," said NASM-certified personal trainer Chris Lee of Hau.fit. You can either hold the tucked position for a tough isometric move, or perform reps as explained below.