Most of my clients need to improve their balance, core strength, and alignment. All of these issues can be addressed with functional exercises. Although the machines are useful for strength gains, I suggest using a variety of tools instead if you are trying to make functional gains. Medicine balls, TRX straps, stability balls, the bosu, rocking boards, foam rollers...the list goes on and on. There are many ways to change up the routine and have some fun during your workouts if you are trying to gain functional strength.