The article posted today on is a refreshing example of a study author admitting to the limitations of a study or body of work. It's a lesson in the importance of carefully critiquing research quality, reliably, and validity. Not all "research" is created equal.

In response to the question of whether to jog lightly, strenuously, our not at all: jogging junkies may want to use caution if they are in the "strenuous" group because we simply do not completely understand the long-term effects of chronic strenuous running on the cardiovascular system. We do, however, know that chronic/repetitive activity of the same motions can create musculoskeletal dysfunction/pathology.

These facts should act as a reminder for endurance runners: accumulating less hours/miles on the pavement and adding high quality resistance training into your routine will pay off. This will move you out of the potentially dangerous strenuous jogging group while making you a faster, more efficient runner while helping you to avoid nagging injuries. 

One of the best young runners in the world is managing miles and doing dead lifts on the way to winning races. 


@tdathletesedge #TDAE #running

Tim DiFrancesco, PT, DPT, ATC, CSCS is the Head Strength & Conditioning Coach for the Los Angeles Lakers and Founder of TD Athletes Edge, where he provides fitness, recovery and nutrition guidance to aspiring and professional athletes. For training advice, visit and follow him on Twitter/Instagram through @tdathletesedge.


Mikkola, J., Vesterinen, V., Taipale, R., Capostagno, B., Hakkinen, K., & Nummela, A. (2011). Effect of resistance training regimens on treadmill running and neuromuscular performance in recreational endurance runners. Journal of Sports Sciences, 13. Retrieved April 7, 2015, from

Weil, E. (2015, March 4). Mary Cain Is Growing Up Fast. Retrieved April 7, 2015