best static holds
Static holds are difficult, but they are important for achieving high strength and endurance. You can perform many exercises that are isometric, including the fold-over and the plank. This way, you can build a foundation for explosive movements.
Another great option for static hold bicep curls is a double weight stack or dumbbells. You can also use a weight machine for double stacked biceps.
A static pull up hold also strengthens the muscles in the back, including the latissimus dorsi (the large back muscle behind your arms). It strengthens your chest, upper back, and shoulder muscles. The muscles in these areas contribute to good posture, which is important for a healthy life.