Hypertrophy-Specific Training

Utilizing lactic acid as a stimulus for tendon repair/health
Now HST incorporates a few other things such as higher reps (for lactic acid) to prepare the muscles and tendons for future heavy loads. This serves as "regular maintenance". Without it, you increase your risk of chronic injuries and pain. The metabolically-taxing reps enhance healing of strained tendons.

Compound Exercises
HST also suggests using compound exercises to maximize the effects of loading on as much muscle as possible per exercise.

Progressively Adjusting reps to accommodate Progressive Load
HST suggests that you use 2 week blocks for each rep range. Why? It has nothing to do with adaptation. It is simply a way to accommodate the ever increasing load. Of course, you could adjust your reps every week (e.g. 15,12,10,8,5,etc), but this is more complicated and people might not understand. Often times, in order to communicate an idea you must simplify things, even at the expense of perfection. If people can't understand it, they won't do it. What good would that do or anybody? Then, over time, people figure out for themselves the other possibilities that exist within the principles of hypertrophy.

Low volume per exercise (average volume per week)
HST suggests that you limit the number of sets per exercise per workout to 1 or 2. This is based on "some" evidence that sets beyond the first "effective" set do little more than burn calories. There is nothing wrong with burning calories, but when you get to be my age you just don't have the exercise tolerance that you once did. Using hormone replacement (HRT) therapy would of course, increase the number of sets you could do without undue stress.

Some may question the validity of HST not utilizing more than 1 or 2 sets per exercise. The number of sets is set low to accommodate the frequency necessary to create an effective and consistent environment to stimulate hypertrophy. Over the course of a week, the volume isn't that different from standard splits (e.g. chest should tri, back bi, legs). (see table below)

Instead of doing 6 sets on bench in one workout, those sets are spread over the course of a week (2 on Mon, 2 on Wed, 2 on Fri). Either way the muscle sees 6 sets each week, however, with HST the distribution of the loading sessions creates a consistent environment conducive to hypertrophy. When you do all six sets at once, you put unnecessary drain on the central nervous system (CNS) and invite centralized overtraining symptoms and burnout.

HST utilizes, when practical, eccentric workouts for 2 consecutive weeks. This suggestion is only for exercises that can be performed in eccentric fashion without risk of injury. Eccentric sets are performed with weight that exceeds their 5 rep max. This is done to extend the progression in load, began at the beginning of the HST cycle, for an additional 2 weeks. The fear of over training is no greater during these two weeks than previous weeks if volume is controlled for. Recent research has demonstrated this. (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17, to name a few) Clearly, the effects of eccentric muscle actions on muscle tissue are one of the most well researched subjects in exercise physiology.

As the research continues to explore the facets of load induced muscle hypertrophy, HST will apply the new knowledge and become even more effective. For today, HST represents the state of the art and science of hypertrophy.

I have now used these principles myself, and have used them successfully to train competitive bodybuilders for some time. It is not "specifically" designed for competitive track athletes, Powerlifters or Olympic lifters, although I have had many athletes from different sports apply HST to their off-season training with ground breaking results. It is designed according to research looking specifically at muscle hypertrophy, not muscle performance.

This subject deserves a lot more attention than I am able to give it here. I will cover the topic more thoroughly in the future, including the references that first shed light on the principles that gave rise to HST. In the meantime, if you want to grow as fast as possible, you must apply currently know hypertrophy-specific training principles.

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References:

1: Nosaka K, Newton M. Repeated Eccentric Exercise Bouts Do Not Exacerbate Muscle Damage and Repair. J Strength Cond Res. 2002 Feb;16(1):117-122.

2: Nosaka K, Newton M. Concentric or eccentric training effect on eccentric exercise-induced muscle damage. Med Sci Sports Exerc. 2002 Jan;34(1):63-9.

3: Proske U, Morgan DL. Muscle damage from eccentric exercise: mechanism, mechanical signs, adaptation and clinical applications. J Physiol. 2001 Dec 1;537(Pt 2):333-45.

4: Nosaka K, Newton M, Sacco P. Responses of human elbow flexor muscles to electrically stimulated forced lengthening exercise. Acta Physiol Scand. 2002 Feb;174(2):137-45.

5: Allen DG. Eccentric muscle damage: mechanisms of early reduction of force. Acta Physiol Scand. 2001 Mar;171(3):311-9.

6: Clarkson PM. Eccentric exercise and muscle damage. Int J Sports Med. 1997 Oct;18 Suppl 4:S314-7.

7: Paddon-Jones D, Abernethy PJ. Acute adaptation to low volume eccentric exercise. Med Sci Sports Exerc. 2001 Jul;33(7):1213-9.

8: Nosaka K, Sakamoto K, Newton M, Sacco P. How long does the protective effect on eccentric exercise-induced muscle damage last? Med Sci Sports Exerc. 2001 Sep;33(9):1490-5.

9: McHugh MP, Connolly DA, Eston RG, Gleim GW. Exercise-induced muscle damage and potential mechanisms for the repeated bout effect. Sports Med. 1999 Mar;27(3):157-70.

10: Nosaka K, Sakamoto K, Newton M, Sacco P. The repeated bout effect of reduced-load eccentric exercise on elbow flexor muscle damage. Eur J Appl Physiol. 2001 Jul;85(1-2):34-40.

11: Rennie MJ. How muscles know how to adapt. J Physiol. 2001 Aug 15;535(Pt 1):1.

12. Nosaka K, Sakamoto K. Effect of elbow joint angle on the magnitude of muscle damage to the elbow flexors. Med Sci Sports Exerc. 2001 Jan;33(1):22-9.

13: Lieber RL, Friden J. Morphologic and mechanical basis of delayed-onset muscle soreness. J Am Acad Orthop Surg. 2002 Jan-Feb;10(1):67-73.

14: Nosaka K, Clarkson PM. Influence of previous concentric exercise on eccentric exercise-induced muscledamage. J Sports Sci. 1997 Oct;15(5):477-83.

15: Carson JA. The regulation of gene expression in hypertrophying skeletal muscle. Exerc Sport Sci Rev. 1997;25:301-20.

16:. Lieber RL, Friden J. Mechanisms of muscle injury after eccentric contraction. J Sci Med Sport. 1999 Oct;2(3):253-65.

17: Nosaka K, Clarkson PM. Muscle damage following repeated bouts of high force eccentric exercise. Med Sci Sports Exerc. 1995 Sep;27(9):1263-9.