Written by justis berg
24 March 2011


I recently received an e-mail stating that “99 percent of all bodybuilders are training wrong!” I clicked on the link and the article made some interesting points, which made me really think: “What is the optimal amount of times a week to train each body part?” The article claimed that whole-body workouts were the lost key for muscle growth. The article stated that when the Weider family introduced split-system training (i.e., upper body one day, lower body the next day), this was the birth of overtraining for bodybuilders.

Weider athletes such as Schwarzenegger and Sergio Olivia were known to perform 30 to 40 sets per body part. The Weider System was the exact opposite of the Arthur Jones training system, which advocated High-Intensity Training acronym HIT. Jones believed that short, intense workouts provided a superior return to the athlete than what was then the standard weight-training workout, one that was long and involved the lifting of a high volume of weights. He specified 16 different Nautilus machine exercises, with 1 set of each exercise performed to failure (where the athlete could no longer perform the exercise), three times per week.

Jones thought that bodybuilders trained with too many sets; he thought the high volume used by bodybuilders creates such a drain on the central nervous system that this inhibits them from training any sooner than a week or so later. Proponents of the Arthur Jones training system advocate the whole-body training routines are superior because:


Ø    A full-body workout recruits more motor units or muscle groups per workout than split training.

Ø    Full-body workouts elicit greater increase in testosterone and GH than split routines.

Ø    Each body part is trained more often and yields a greater anabolic effect.

Ø    A body part is usually recovered within 48 hours; therefore, not training that muscle again within 48 hours is wasted time off.

Ø    Protein synthesis rates for muscles can be increased for 48 hours after a muscle is trained and then starts to drop.

Advocates of multiple training sessions per body part, such as twice a week compared to once per week, claim that it takes advantage of the anabolic effects of resistance exercise. The anabolic effects of resistance exercise are elevated rates of protein synthesis in the muscle, which lasts about 48 hours. Then, it stops and everything is back to normal. If you go on to wait an entire week before training again, you simply won't grow as fast as you could. Based on this premise, it seems that once-a-week training is not optimal for muscle growth, but before a bodybuilder decides to try to train more, a bodybuilder needs to ask, “Have I recovered from my previous workout?”

Training Frequency Is Recovery Dependent

Traditionally, I have trained one body part per week; however, a training partner and I decided to try the old-school training and try the whole-body, three-day training routine. After a few weeks, the pounds started dropping while my training partner’s lifts kept going up. We were doing the exact same routine; he was getting stronger and I was overtraining. What the hell was going on? It made me realize how different our genetic recovery capacity was; additionally, he is 10 years younger than me.

Another example of superb recovery capacity was an interview with “World’s Strongest Man” competitior Mariusz Pudzianowski; he does two workouts a day, one is strongman training and one is in the weight room. His workouts consist of back squats one day, deadlifts the next day, front squats the next day. He trains his shoulders by doing behind-the-neck jerks, where he works on speed and explosiveness, three times a week. He starts with push jerks, working up to 405 for a very easy and fast 2 reps. He then squats high bar, Olympic style, up to 2 easy, quick sets of 585 for 3 reps. Guys who have trained with him say that his work capacity and recovery ability are totally out of this world. They also commented that most strongmen would not be able to train in this fashion without overtraining. Each person recuperates at different rates from workouts differently. Some people are blessed with great genetic potential for recovery, while others need longer.

Testosterone Enhances Muscle Recuperation

Training frequency is recovery dependent. If you are using anabolics, then you can more than likely train with greater frequency and recuperate faster. If you are using testosterone, you may well be able to train each muscle twice a week. For an excellent review on the physiology of how anabolic agents increase muscle recuperation, read Dr. Lynch’s 2008 article7 titled, “Anabolic agents for improving muscle regeneration and function after injury.” Administration of testosterone increases muscle mass in elderly men1, 2 or men administered catabolic drugs such as glucocorticoids3,4 as well as preserves muscle mass in burn patients.5 These studies have also suggested, through analyses using isotope tracers, that increases in muscle mass were attributable to reduced rates of protein catabolism.1, 2, 5

It was just recently reported that testosterone suppressed the activation of a major catabolic protein called Muscle Atrophy Factor.5 Many beginning bodybuilders think that there is a “secret” training routine that the pros are using. A person who is natural should not try to follow the training routine of a Team MD bodybuilder. Take a look at the study below, showing how testosterone levels dictated levels of muscle regeneration and repair.

Ø    A preliminary study examined the effect of two doses of nandrolone deconoate (2mg/kg and 6mg/kg) on regeneration and satellite cells in mouse skeletal muscles following intense muscle damage. The mice using 6mg/kg experienced enhanced muscle regeneration; however, regeneration was not improved in injured muscles of mice treated with a lower dose of 2mg/kg nandrolone deconoate. Thus, the higher dose (6mg/kg) of the anabolic steroid was required in mice in order to produce a beneficial effect on muscle regeneration after severe muscle damage.8 The study suggests greater testosterone enhances muscle recuperation.

The point I am trying to make is that just because Ronnie Coleman trained each body part twice a week does not mean you can train this way. Your ability to train depends on a number of factors…I often wondered why some people such as powerlifters can train one body part a week and be massive. Both Ronnie Coleman and Dorian Yates were mass monsters, but their training routines were completely different. Ronnie trained each body part twice a week, while Dorian trained each body part once a week. Each man, probably through trial and error, found a system that worked for his genetics.


Ronnie Coleman

Monday: Back, biceps, shoulders, calves, abs
Tuesday: Quads, hamstrings, abs
Wednesday: Chest, triceps, calves
Thursday: Back, biceps, abs
Friday: Quads, hamstrings
Saturday: Chest, triceps, shoulders, abs

Sunday: Rest


Dorian Yates
Monday: Delts, traps, triceps, abs
Tuesday: Back, rear delts
Wednesday: Rest
Thursday: Chest, biceps, abs
Friday: Rest day
Saturday: Quads, hams, calves
Sunday: Rest


MGF and IGF-1 Expression after Muscle Damage

A recent study released in the Journal of Physiology helped me understand what happens to muscle growth factors after one intense bout of exercise, and more importantly what happens to the growth factors in the recovery period. IGF-1 is a growth factor found in circulation (produced in the liver) and locally in muscle. The researchers looked at the three isoforms produced in muscle (IGF-1, IGF-1Ea, IGF-1Eb and MGF) that each may contribute in some extent to muscle regeneration. IGF-1Eb may be involved in hypertrophy or muscle regeneration; however, the physiological role of IGF-1Eb in human skeletal muscle is currently unknown. MGF is a splice variant of IGF-1Ea that stimulates satellite cell activation and muscle hypertrophy following muscle stretch or muscle damage.10 The study had young subjects (average age of 20 years old) perform 30 sets of 10 maximal eccentric contractions with 1-minute rest periods. Bring the pain!

Muscle biopsies were taken both immediately before and after exercise. The study found that MGF expression (a potent muscle growth stimulator) peaked at 24 hours, but then IGF-1 isoforms were still elevated after muscle damage, suggesting muscle repair was still occurring. Another interesting point was that after intense muscle damage, MGF was activated while serum IGF-1 levels showed no change! Additionally, the Journal of Hormone and Metabolic Research reported that strength training was increased after 12 weeks, despite unchanged levels of serum IGF-1 in men.13 It seems that peripheral changes in IGF-1 may not be as important for muscle growth as once thought...getting back to recuperation.

The point to think about is that if you tried to retrain legs after an exercise protocol 48 hours after exercise, you would still be in the recuperation phase and start overtraining. Your training frequency depends on your recuperation!  The more muscle damage you create during exercise, the more recovery time will be needed before you can train again. In the study mentioned above, after intense eccentric exercise, muscle recovery was still not complete after three days. It’s interesting that most of the studies suggest that with eccentric exercise and muscle damage, muscle growth factors are expressed shortly thereafter. It’s interesting that Olympic lifters can train six days a week. In training, however, Olympic lifters rarely perform more than 5 reps per set (most sets are for 1-3 reps) and the eccentric portion is all but eliminated, because the bar is dropped to the floor at the end of every lift. Low mechanical work plus no eccentric equals the capacity to train the lifts extremely often. It’s interesting that when comparing muscle recuperation times for concentric and eccentric exercise, it takes longer for muscle to recuperate from an eccentric bout than a concentric bout.11


Whole-Body Routines Are Great for Football Players/Athletes Not Bodybuilders!

Training frequency is also dependent on the level of nervous system fatigue that is induced during each training session. If you do not tire out the nervous system, you can obviously train more often. I imagine that if you perform 1 set of exercise as Jones recommended, you could probably train again 48 hours later, but is one set capable of stimulating muscle growth?

The research clearly states that satellite cells are activated in response to muscle damage and multiple sets clearly induce more muscle damage and satellite cell activation. Based on the research, multiple sets are superior to single sets for stimulating muscle growth. Yet, one of the most recent reviews (published in the Journal of Strength and Conditioning Research) concludes that multiple sets work better.12 The data shows that single- and multiple-set programs produce similar results during shorter studies using untrained individuals. However, trained subjects using multiple- rather than single-set programs gain strength faster. Larger muscle groups also tend to recover more slowly than smaller muscle groups. For example, the smaller arm muscles (i.e., biceps and triceps) can be trained more frequently (two to three times per week), while the larger muscles in the legs take longer to recover and will respond better to one to two workouts per week.

Everyone Is Different!

So, what frequency do I recommend? Well, I have no definite answer because this all depends on your training age, exercise volume, nutrition, anabolic use, supplements and sleep. It is well known that muscle with type I fibers such as calves and the abdominals can be trained nearly every day, whereas type IIb muscle fibers in the legs need longer recovery times. Older athletes do not recover as quickly from exercise as younger athletes, so they may opt for a once-a-week training system, whereas a younger 18-year-old can perform each body part twice a week.

I think whole-body training sessions are great for athletes, not bodybuilders! Football players often train this way during the season with great success, but this is for athletic purposes, not bodybuilding. If whole body part sessions did work and are so great, then why aren’t professional bodybuilders using them? I think a complete body workout may be good for a beginner or competitive athletes looking to maintain strength during the season, but not for bodybuilding. Bodybuilders must perform some trial and error to determine whether once or twice a week is beneficial.


Key Points:


Ø    Training frequency is recovery dependent.

Ø    Testosterone accelerates muscle repair and turns off catabolic genes.

Ø    After intense muscle damage, MGF is activated, while serum IGF-1 levels showed no change!

Ø    Type I fibers such as calves and arms can be trained more frequently than type II explosive fibers (legs).




  1. Ferrando AA, Sheffield-Moore M, Yeckel CW, Gilkison C, Jiang J, Achacosa A, Lieberman SA, Tipton K, Wolfe RR, Urban RJ 2002 Testosterone administration to older men improves muscle function: molecular and physiological mechanisms. Am J Physiol Endocrinol Metab, 282:E601–E607
  2. Urban RJ, Bodenburg YH, Gilkison C, Foxworth J, Coggan AR, Wolfe RR, Ferrando A 1995 Testosterone administration to elderly men increases skeletal muscle strength and protein synthesis. Am J Physiol, 269:E820–E826
  3. Reid IR, Wattie DJ, Evans MC, Stapleton JP 1996 Testosterone therapy in glucocorticoid-treated men. Arch Intern Med, 156:1173–1177
  4. Crawford BA, Liu PY, Kean MT, Bleasel JF, Handelsman DJ 2003 Randomized placebo-controlled trial of androgen effects on muscle and bone in men requiring long-term systemic glucocorticoid treatment. J Clin Endocrinol Metab, 88:3167–3176
  5. Ferrando AA, Sheffield-Moore M, Wolf SE, Herndon DN, Wolfe RR 2001 Testosterone administration in severe burns ameliorates muscle catabolism. Crit Care Med, 29:1936–1942.
  6. Zhao W, Pan J, Wang X, Wu Y, Bauman WA, Cardozo CP. Expression of the muscle atrophy factor muscle atrophy F-box is suppressed by testosterone. Endocrinology, 2008 Nov;149(11):5449-60.
  7. Lynch GS, Schertzer JD, Ryall JG. Anabolic agents for improving muscle regeneration and function after injury. Clin Exp Pharmacol Physiol, 2008 Jul;35(7):852-8. Review.
  8. Souza R, Goncalves W, Dal Pai-Silva M, Gallacci M. Influence of anabolic steroid treatment upon muscle regeneration and satellite cells of mice following envenoming by Bothrops jararacussu snake venom. Toxicol Lett, 2007; 172: S237
  9. McKay BR, O'Reilly CE, Phillips SM, Tarnopolsky MA, Parise G. Co-expression of IGF-1 family members with myogenic regulatory factors following acute damaging muscle lengthening contractions in humans. J Physiol, 2008
  10. Hill M & Goldspink G (2003). Expression and splicing of the insulin-like growth factor gene in rodent muscle is associated with muscle satellite (stem) cell activation following local tissue damage. J Physiol, 549, 409-418.
  11. Linnamo V, Bottas R, Komi PV. Force and EMG power spectrum during and after eccentric and concentric fatigue. J Electromyogr Kinesiol, 2000 Oct;10(5):293-300.
  12. Wolfe, B.L., LeMura, L.M., & Cole, P.J. (2004). Quantitative analysis of single- vs. multiple-set programs in resistance training. Journal of Strength and Conditioning Research, 18, 35-47.
  13. Schiffer T, Schulte S, Hollmann W, Bloch W, Strüder HK. Effects of Strength and Endurance Training on Brain-derived Neurotrophic Factor and Insulin-like Growth Factor 1 in Humans. Horm Metab Res, 2008 Oct 29.



Speaking of MGF….


Researchers from Italy provided more evidence that GH by itself is highly overrated as a doping agent. Previous research showed that GH could elevate MGF animals that were GH deficient. Researchers studied the effects GH, testosterone, or a combination of GH and testosterone in both GH deficient and normal rats. Take a look at the chart below.





Low GH Rats



GH Alone


No Effect

Testosterone Alone

No Effect

No Effect

Testosterone and GH

No Effect

No Effect




Normal Rats



GH Alone

No Effect


Testosterone Alone

No Effect


Testosterone and GH

No Effect



They found that GH increased MGF in GH-deficient rats, but GH had no effect on MGF in normal rats and even worse, it increased myostatin! Testosterone decreases myostatin in normal rats and had no effect of MGF. The researchers speculated that myostatin levels increased (negative feedback) as a counter-regulatory mechanism to reduce the anabolic actions of GH. This may be the reason that GH is a poor anabolic agent, as the anabolic actions of GH are offset by a rise in myostatin. Testosterone, on the other hand, resulted in anabolic action by reducing myostatin. The researchers again concluded that GH by itself has minimal anabolic actions in normal rats.


Rigamonti AE, Locatelli L, Cella SG, Bonomo SM, Giunta M, Molinari F, Sartorio A, Müller EE. Muscle Expressions of MGF, IGF-IEa, and Myostatin 
in Intact and Hypophysectomized Rats: Effects of rhGH and Testosterone Alone or Combined. Horm Metab Res, 2008 Oct 7.