Can we slow the aging process? What is the relationship between caloric restriction and overall health, longevity, and aging? Here, Peter Attia, MD, interviews Steve Austad, Ph.D., a distinguished professor of biology at the University of Alabama, to discuss key moments in the scientific exploration of these questions. Attia argues, “The worse the diet, the more beneficial the caloric restriction. The better the diet, the less of an impact the caloric restriction has.” Attia suggests this means “dietary restriction might be as important if not more important than caloric restriction.” The most important element to restrict? No surprises here: sucrose.

What makes rowing popular with elite athletes and CrossFitters is exactly what many in the general fitness population dislike about it: your weaknesses cannot be hidden on the rowing machine. It is a human polygraph of physical and mental performance. Stroke for stroke, you are provided with feedback that both reveals any weak spots and very visibly demonstrates the relationship between performance and proper technique.  —Angela Hart, "Rowing Technique," CFJ

Kipping comes in a myriad of styles, and each athlete has a signature kip, but in its most elegant form the kip is a transference of movement first generated in the horizontal plane, where it comes cheap and easy, to the vertical plane, where momentum and a perfectly timed pull from the back launch the athlete forcefully upward.

The overhead squat "develops the squat by amplifying and cruelly punishing faults in posture, movement, and stability."