If you have little time to work out, machines can prove to be better value. Machines are also much safer and take the strain as opposed to your back which, if you are unaware that you might be performing actions poorly, may get damaged. Diagrams can show you how to operate them efficiently and effectively. Being more stable and supportive, they are great for helping you if you have injuries. Lifting weights with your legs is much easier using machines and dumb bells can be uncomfortable on your legs. It might however be tricky to determine exactly which positions the machines ideally need to be in and where to position your body for the best results. You may have to wait around at the gym for machines to become free whereas dumb bells are available in much greater amounts so you can usually find the equipment you want more quickly and you can of course exercise anywhere! Aligning your body with these weights can be tough and injuries can occur but overall results are good and it can be more enjoyable to work out in this manner than through using machines which may get tedious.