The 4 Principles of Functional Training – Principle #3 Balance vs Bulk
Concerned about developing large and bulky muscles? Functional training techniques help you create a leaner, tighter and more-integrated physique. Machine-centered training, and an isolated body-building style of training for 8-15 repetitions per set generally will cause what is known as sarcoplasmic hypertrophy, where the belly of the muscle increases in size, causing unnatural “bulking” of the muscle.
Instead, work in ranges of 3-5 reps with functional movements to achieve better strength gains and tone, while improving your joint health.