Dr. Perlmutter demonstrates triceps extensions, an incredibly important exercise for building a strong body. You can read more about this exercise in The Grain Brain Whole Life Plan, in which Dr. Perlmutter shares his favorite exercises for strengthening and toning your body.
Livestrong offers some further guidance on why strengthening your triceps is critical for your health:
The triceps help stabilize your shoulder joint and they act as an extensor of the elbow and shoulder. As your triceps become stronger with these exercises, the strength and stability of your shoulders and elbows increase. The functionality, flexibility and range of motion of your arm increases the more you work and strengthen these muscles. As a result, your performance improves in sports that require arm movements and upper body strength such as tennis, swimming, volleyball and basketball.