Full Body Workouts: Split Body or Full Body Workouts Result in Similar Gains
Casey Viator was a beast, yet he trained three times a week, working the whole body in one workout lasting about 2 to 2½ hours. Who trains like that these days? Nobody in the current bodybuilding circles follows full body workouts anymore. Regular resistance training has consistently been shown to produce rapid and marked increases in both muscle strength and hypertrophy across a wide variety of populations. Optimization of muscular adaptations is influenced by the prescription of resistance training variables including load, volume, and rest interval. There has always been a debate among bodybuilders as to how many days per week is optimal for muscle growth and strength. For years, bodybuilders did workouts three days per week, whole body training. Then, gradually in the 80’s and especially the 90’s people started to move into body part splits and training a muscle once per week. A recent survey of 127 competitive male bodybuilders found that more than two- thirds of respondents trained each muscle group only once per week. Compared to full body routines, it is believed that a split routine allows total weekly training volume per muscle group to be maintained with fewer sets performed per training session and greater recovery afforded between sessions.
Full Body Workouts: Untrained Athletes Respond Better to Training Frequency
Many studies have equated training volume when examining the effects of different workout frequencies, periodization models and loading protocols, as well as comparing differences in full-body (FB) and split-body (SB) training. Now, the pendulum has swung back in the other direction, and high-frequency training is more popular. In 2011, researchers compared training three vs. four times per week on strength and body composition in middle-aged women. One group trained three times per week doing three sets of 8 exercises while the other group trained four times per week on an upper/lower split doing three sets of 6 upper body exercises or 6 sets of 3 lower body exercises (i.e. both groups did 72 sets per week – same volume). After eight weeks, there was no significant difference in strength or lean muscle gained.
Full Body Workouts: Whole vs. Split-Body Training- Study # 1
A new study published ahead of print in the Journal of Strength and Conditioning Research sought to compare traditional hypertrophy training (body part split, muscles trained once per week) to a higher frequency training protocol (full-body workouts, muscles trained three times per week). A split body routine (SPLIT) where multiple exercises were performed for a specific muscle group in a session with 2-3 muscle groups trained per session, or; a total-body routine (TOTAL), where 1 exercise was performed per muscle group in a session with all muscle groups trained in each session. Twenty well-trained college-aged males were split into one of the two training programs. The training program lasted eight weeks and involved three training sessions per week on non-consecutive days. The groups were matched for baseline strength and body mass. Before and after the training program, the researchers evaluated muscle thickness of the forearm and the vastus lateralis (i.e. quadriceps) in addition to 1 rep max in the bench press and parallel back squat. Volume was equated, and nutrition was monitored to control for confounding variables. Collectively, these results suggest that training muscles three times per week is likely superior to training them once per week for strength and hypertrophy gains.
After the eight week training period the results tended to favor the higher frequency training group. 1RM bench press improved by 10.6% in the high-frequency group (3 days per week training) compared to a 6.3% increase in the body part split group. Improvements in 1RM squat strength did not differ between groups (~11% increase in both). Though not all reached significance, muscle thickness measures were greater in the high-frequency training relative to the body part split group. Collectively, these results suggest that training muscles three times per week is likely superior to training them once per week for strength and hypertrophy gains. The authors suggest periodizing training by varying training frequency to maintain the effectiveness of the stimulus. In sum, the researchers found that training muscle more frequently resulted in greater gains in strength and muscle hypertrophy.
Full Body Workouts: Whole vs. Split-Body Training- Study # 2
A new study in the Journal of Biology in Sport examined the effects of two equal-volume resistance training protocols upon strength, body composition and salivary hormones in male rugby union players. Using a crossover design, 24 male rugby players completed either a:
– 4-week full-body (FB). The prescribed exercises included; back squats, leg curls, leg press, bench press, bent-over row, pull downs, shoulder press, bicep curls and calf raises.
– 4- week split-body (SB) training protocol of equal volume during the competitive season.
The groups then crossed over to complete the other training protocol after an 8-week washout period. Training involved eight repetition maximum lifts for selected exercises, performed for 3-6 sets with rest periods of 60-90 seconds between sets and exercises. At the end of the study, both training methods increased 1RM strength to a similar extent and facilitated positive changes in body composition (bodyfat and lean muscle mass) after only four weeks. The full-body and split-body protocols improved upper (7.3% and 7.4%) and lower body 1RM strength (7.4% and 5.4%), whilst reducing body fat (-0.9% and -0.4%) and fat mass (-5.7% and -2.1%), respectively. The two training protocols improved various aspects of body composition (i.e. bodyfat decreased, fat-free mass increased), with full body training producing more favorable bodyfat and increases in fat-free mass. This could be due to the activation of more muscle groups per training session.
This study was fascinating because I would have assumed that the split body training would have resulted in greater increases in muscle mass and strength, but both full and split body routines resulted in similar increases in muscle mass and strength. Based on the suggestions, full body routines may be something to try out for a few weeks for variety.
Crewther BT, Heke TOL, Keogh JWL. The effects of two equal-volume training protocols upon strength, body composition and salivary hormones in male rugby union players. Biol Sport. 2016;33(2):111–116.
Schoenfeld, B. J., Ratamess, N. A., Peterson, M. D., Contreras, B., & Tiryaki-Sonmez, G. (2015). Influence of Resistance Training Frequency on Muscular Adaptations in Well-Trained Men. The Journal of Strength & Conditioning Research. Ahead of print.
Candow, D.G., & Burke DG. (2007). Effect of short-term equal-volume resistance training with different workout frequency on muscle mass and strength in untrained men and women. Journal of Strength and Conditioning Research, February, 21(1), 204-207.
Fry, AC, Schilling, BK, Staron, RS, Hagerman, FC, Hikida, RS, and Thrush, JT. Muscle fiber characteristics and performance correlates of male Olympic style weightlifters. J. Strength Cond Res. 17: 746-754, 2003