Suspended Fitness is a brilliant and versatile type of training, however it should never be the ONLY training method used with clients, as there are other complimentary training options that are necessary.
Analogy:
Imagine that Suspension Straps are a swiss army knife (multi tool), and that a Barbell is a hammer.
A swiss army knife is a wonderful tool that you can do many jobs with, but if you have to hammer nails into hard wood, a hammer is a much better tool for the job!
This is the same for your suspension straps, they are versatile and a great fitness tool, but a complete toolbox must also have complimentary tools to best suit the training requirements of different users.
Here are some additional complimentary tools that work well with suspended fitness: