Tools like dumbbells or weighted bars that oppose the force the muscles generate with concentric or eccentric contraction.
Yes I do, they are used to oppose the force generated by my muscles through concentric or eccentric contractions!.
I love to exercise. I feel so sluggish on days when I don't work out at the gym. Interesting, are you working on physical fitness for sport, or your occupation or some daily activity? Just to be fit, it actually feels great to work out and have a purpose doing something. I may add strength training too however I'm not certain yet what it'll build on me. Since strength training would induce muscle contractions, it'll build anaerobic endurance, strength as well as skeletal muscle size. That's great, what tools are needed for it?
It utilizes the force of gravity in the form of weighted bars, dumbbells or weight stacks in order to oppose the force generated by muscle through concentric or eccentric contraction.