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marylin monroe
Showing posts with label 6-pack. Show all posts
Showing posts with label 6-pack. Show all posts

Optimal Fat Loss - Best Time, Intensity and Equipment: Medium Intensity Aerobic Exercise in the PM at 60% For Obese and >60% For Lean To get Shredded. Vibration Training Won't Help, Though.

Although I suppose that what I am about to tell you won't settle the everlasting debate on the effectiveness of early morning cardio training on an empty stomach (or even cardio training in general) for fat loss, you may nevertheless be interested to hear the results of a a study which has recently been published in the Journal of Human Sports & Exercise (Mohebbi. 2011).

Figure 1: Percentage of VO2Max for maximal (red) and minimal (green) fatty oxidation (main axis) and maximal fatty oxidation (secondary / right axis) absolute values in mg/min/fat free mass (data adapted from Mohebbi. 2011)
Mohebbi & Aziz recruited 12 normal-weight and 10 obese men for their study and measured maximal fat oxidation (MFO) in the course of a standardized treadmill incremental running exercise, where speed and increment were increased at 3 minute intervals. MFO was determined by VO2 / VCO2 measurements during the last 2 minutes of each exercise stage. With the participants performing the same exercise protocol twice, once in the AM (8-12h fasting) and once in the PM (5-6h fasting) the study design allowed to assess both, the effects of exercise time, as well as those of the exercise intensity on fatty acid oxidation in lean, as well as obese individuals. The main results were as follows:
fat oxidation rates and energy expenditure in both groups in the evening were higher than morning; there were no significant differences in MFO between obese and normal groups. Furthermore, the fat oxidation rate in low intensity exercise (<60% VO2max) was similar in obese and normal weight groups, but in high exercise intensities, in normal weight men were significantly higher than obese men.
Obviously, these results have practical implications in terms of exercise time and intensity which also depend on the training status / body composition of the individual. For "optimal" fat loss while training in a "fasted" (or at least not a postprandial state)...
  • normal weight men optimally train in the PM at an exercise intensity >60% VO2max
  • obese men optimally train in the PM at an exercise intensity of approximately 60% of their VO2Max 
The substitution of the good old treadmill for one of those fancy XXL-vibrators, which are used by more and more gym owners to rip off lazy... ah, I mean attract new clients, would turn out to be pretty useless, however. Published in the same journal is a paper by Cochrane (Cochrane. 2011) in which the author warns that in contrast to claims from the popular press, which say that "10 minutes of VbX [vibration exercise] is equivalent to one hour of traditional exercise", just hopping onto a giant vibrator although it may "increase whole and local oxygen uptake", even when executed ...
[...] with additional load, high vibration frequency and/or amplitude [...] cannot match the demands of conventional aerobic exercise. Therefore, caution is required when VbX programmes are solely used for the purpose of reducing body fat without considering dietary and aerobic conditioning guidelines.
Image 1: Not so innovative as you may have though:
"Vibration is life", advertisement dating back to 1910!
(Der Spiegel, 1/1999, p.145).
Fat or lean, lazy or not, you better get your asses off your vibrating couch and out into the park, because - guess what - you do not even need a treadmill to get in shape. Apart from some running shoes (some may argue running barefoot would be even better), nature already provided you with all the tools it takes to strip off the unaesthetic and oftentimes unhealthy fat-pads and get your six-packs summer-ready. You're still reading? What are you waiting for? Go for it!

On a side note: Isn't it interesting that the results of this study suggest that higher intensities become more and more effective, the leaner / fitter you get? Well, guess why most studies on obese people showed benefits of light intensity steady state cardio, while more recent studies on fit people or even athletes suggest that high intensity interval training (HIIT) is far superior to "recompose" your body.

Integrated Core Exercises for Six-Pack Abs: New EMG Data Questions Efficacy of Crunches, Extensions & Co.

Image 1: Jersey Shore or a fortified core,
what do you chose? (img mediabistro)
If you train in one of the mainstream gyms, you will probably already have realized: It is May, and the beach season is approaching! Now, that it is almost too late for the chubby coach-potatoes to get in shape, they finally realize that their never-existent six-pack is buried under several layers of flabby adipose tissue... so what do they do? Right, they perform the most ridiculous contortions, .. ah, pardon, "ab-exercises" you can think about and talk to their pre-obese neighbor on the right about how they feel their abs working during their latest and greatest Men's Health, Shape and Co "Jersey Shore Ready Beach Workout 2012" ;-)

Strong core and six-pack abs, anyone?

Most of the aforementioned spring-break warriors would be better off dieting hard, and lifting heavy, but I don't have to tell you that, right? Lean or about-to-be-lean as you are, you are probably more interested in which ab-exercises will complement your balanced workout routine best, right? According to the latest research from scientists at the Pennsylvania State University and Le Mills International in Auckland City, NZ, these are not the classic crunch, the oblique crunch and the extensions, everyone is doing for the rectus abdominis (what people usually call their "abs"), the obliques and the musculature of the erector spinae (Gotschall. 2012).
Figure 1: Normalized EMG data for the different exercises and muscle groups (data adapted from Gotschall. 2012)
The EMG measurements Gotschall et al. recorded for healthy college students (10 men, 10 women) suggest that integrated core exercises, rather than isolation movements, are the way to go to maximally stimulate your "abs", your obliques and your lower back. As the data in figure 1 goes to show, not just one, but all of the integrated core exercises shown in figure 2), i.e. (exercise descriptions are quoted directly from Gotschall. 2012) ...
  • Int. Hover with Lateral Arm Reach. Each participant began the exercise in a prone position with the shoulders superior to the elbows, forearms flat with the surface of the floor, shoulders and hips at an even height from the floor, and feet wider than the hips. There [sic!] were instructed to move a single hand laterally from the start position across the floor until the elbow was extended and return to the start position at the cadence of the metronome. 
  • Int. Balance Mountain Climber Plank. The participants were instructed to start with their shoulders, elbows, and wrists aligned from superior to inferior with their feet hip width apart. We provided the cue of flexing the knee to the opposite elbow at the cadence of the metronome and maintaining a flat upper body while twisting the lower body. 
  • Int. Side Hover. Each participant began the exercise in a side position with the shoulders superior to the supporting elbow, supporting forearm flat with the surface of the floor, and feet stacked. We then instructed them to hold the nonsupporting hand superiorly above the head arm for 20 seconds. 
  • Int. Pointer. The participants started in a quadrupedal stance with both hands and knees flat on the surface. We then instructed them to contract their gluteal muscles to lift a single leg and opposite arm to the height of their shoulders at the cadence of the metronome. 
... were superior to their classic counterparts, the isolation crunch, the oblique crunch and, of course, the notorious back extensions done lying on one of those exercise mats.
Figure 2: The integrated core exercises; for a detailed exercise descriptions see text above (img Gotschall. 2012)
The normalized EMS values of the respective target muscles, the rectus abdominis (crunch), the obliques (oblique crunch) and the musculature of the eretor spinae (extensions) were...
  • +225% and +250% higher for the int. hover and the int. m.c. plank than for the crunch
  • +9% higher for the int. side hover than for the oblique crunch, and
  • +66% and +41% higher for the thoracic and lumbar erector for the int. pointer vs. extensions
As you may already have recognized, the additional activation during the side hover, as compared to the oblique crunch, is not only comparably low, the int. mountain climber plank, the int. hover with lateral arm reach and even the standard crunch elicit a +36%, +30% and still +6% higher EMG activitity of the abdominal oblique than the purported "gold standard", trainers in most commercial gyms still prescribe as the "go-to exercise for your obliques".

High EMG values don't equal six-pack abs & 'integrated' exercises  require core stability

Just because the EMG activity that is the electrical potential the scientists measure by the means of surface electrodes is higher for a given exercise than for another, this does not mean that the results you will get from this particular exercise are necessarily going to be superior to those you would see if you performed the 'non-integrated' variety. If you read through the descriptions the scientists give as far as the execution of the exercise is concerned, you may also realize that many of the "spring break warriors" are probably not even able to perform those "integrated exercises" correctly, because they require a non-negligible core-strength to begin with; a foundation, the average Facebook addicted 2012 couch potato is lacking and which obviously cannot be build on the 1000-crunches-a-day people like "The Situation" apparently really believe they had build their abs with.
ChestBicepsBackCoreLegsTricepsShoulders
EMG data for all body-parts -> The SuppVersity EMG Series - Click on the desired body part to see the 'optimal' exercises.
If you can do those movement properly (note: even if you have the strength it will take some practicing to acquire the skills!), fine, do them! If you can't or just started training with your cousin who is raving about the ab-workout he has heard the aforementioned media-personality talk about in one of his YouTube vidoes, you better start (him) out with 'less-integrated' versions of those exercises, such as the "boring"
  • regular plancks, for the rectus abdominis and the obliques, and
  • classic pointers, for the musculature of the erector spinae.
And don't worry, in view of the fact that none of these exercises, advanced or not, are going to shed the flab that may still be covering your muscles, anyways, you and your cousin can, with a clear conscious, take your time, to fortify your core. Not for the next beach season, and not just to build the foundation which will allow you to increase your deadlifts, your squats, your bend-over rows, your pull-ups and all the other movements of which people often don't even realize how much core stability they require, but also and most importantly to be able to walk upright and without pain to the day you depart this life.