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Should you do cardio before or after your weight workout? Many prefer to do their cardio before lifting to get it out of the way and as a general warm-up. I do endorse a 5 minute pre-workout general warm-up for safety' sake, but for maximum fat loss, post weight training aerobics should be the mainstay of your program.
The funny thing about being on the cutting edge of weight loss science is that people are reluctant to believe you until someone with a M.D. says it is so. Well, wonder of all wonders, it just so happens that a recent study suggests that the best time to do cardio is after a weight workout and that how long you rest between the two can make a difference in both hormone release and fat burning.
This is not new information to bodybuilders who specialize in rapid fat loss year in and year out. My experience as a competitive bodybuilder is what prompted me to use this style of training for fat loss in my clients.
The study was presented at the 2006 ACSM meeting and featured 10 healthy men who did three types of exercise routines on different days: 1) Endurance exercises only 2) Endurance exercise after weight training and a 20 minute rest 3) Endurance exercises after weight training and 120 minutes rest
The weight training workout consisted of six exercises each done for three to four sets of 10 reps. Pretty standard fair and similar to the second phase of the Fat to Fit Program. The cardio exercises consisted of stationary cycling for an hour at low intensity (50 percent of maximum heart rate.
For maximum fat loss I would suggest a higher intensity level and a more High Intensity Interval Training style as opposed to the low intensity approach used in the study.
Doing the weight workout before aerobics led to marked increases in lactate, norepinephrine and growth hormone levels. These are all great things when it comes to maximum fat loss. Before the endurance exercise started those in the 120 minute rest group showed the highest levels of free fatty acids in the blood, while those in the 20 minute rest group showed higher levels of norepinephrine and growth hormone.
During the endurance and weight training exercises, blood levels of free fatty acids and glycerol were higher in both weight training groups than in the endurance only group. The bottom line is that those in both weight training groups were burning more fat during the aerobic exercise than the aerobics only group.
You can compound the case for post workout aerobics further by adding in the fact that not only did the group that did weight training first burn more fat during their cardio but also burned more calories in total by virtue of an increased overall daily metabolism increase and calories expended through the actual resistance training itself.
The study clearly shows that doing a weight workout before aerobics leads to hormonal changes that increased fat oxidation (read weight loss or fat burning) during the following aerobic workout.
Here is another angle to the story. Imagine yourself doing 30 minutes to an hour of aerobics and then going on to do your weight training. How much energy do you really have left to do justice to your weight training? After all that cardio, you have burnt through your glycogen stores (which are the muscle preferred source of fuel) and will not have the energy to stimulate the most outrageous fat burning method available to you. An all day long, increased metabolism, because you stimulated your muscles.
It kind of makes you smile when you find out information like this doesn't it?
The physiological mechanisms that cause DOMS or PEMS are not completely understood but the leading hypotheses are: (1) the Connective Tissue Damage Hypothesis, (2) Skeletal Muscle Damage Hypothesis, and (3) The Spasm Hypothesis.
Connective Tissue Damage Hypothesis. In a 1997 study, Brown, Child, Day and Donnelly reaffirmed an early study done by Abraham suggesting that DOMS or PEMS is due to a disruption in the connective tissue of the muscle and tendinous attachments.
Skeletal Muscle Damage Hypothesis. In a 1986 study, Clarkson et al found that serum creatine kinase concentration was elevated with concentric, eccentric and isometric contractions, with greater perceived muscle soreness associated with the eccentric contraction. In a 2000 article entitled “Effects of Plyometric Exercise on Muscle Soreness and Plasma Creatine Kinase Levels and its Comparison with Eccentric and Concentric Exercise" (The Journal of Strength and Conditioning Research: Vol. 14, No. 1, pp. 68–74), the authors found Clarkson’s study not only proved to be true but also concluded that plyometric activities had incurred perceived muscle soreness than concentric contractions.
Spasm Hypothesis. In a 1980 study, Devries proposed that DOMS or PEMS is due to a restriction in blood supply, generally due to factors in the blood vessels, with resultant damage or dysfunction of tissue called ischemia. As you continued to workout, further ischemia would result in more damage and "soreness." This theory was further proven by work done in 2000 by Barlas, Walsh, Baxter, and Allen.
Sources: ISSA Complete Guide to Fitness: Edition 8.1.5, Unit 15, pp. 415DOMS or PEMS seems to be a side-effect of muscle tearing and repairing that occurs after a workout. It's an unfortunate side-effect as well because you are very sore and it takes 2 or more days for the soreness to go away. Soreness should not be a goal of training. Many people experience soreness when they do a particular exercise with a moderate to heavy weight and get a good, deep stretch. Not every person experiences muscle soreness. In fact, many do not yet they continue to make fantastic progress.
Forget soreness as an indicator or progress and use the most underutilized piece of equipment in the gym to tell you EXACTLY where you are, where you've been and if you are making forward movement.
What's the piece of equipment'A training journal!Your goal should be to improve on your last efforts. Getting a little bit better with each step and each workout. If you track your progress in some type of journal, it’s easy to see if you are improving. It's even more beneficial to track some of your body measurements (fat loss, weight gain, size on arms and legs).
Use your journal to track your progress and your perception of how you feel. When you are done with a workout, you should feel better. Not so fatigued you can’t drive home. And not puking or so nauseous that it's difficult to impossible to eat post-nutrition foods. You want to push yourself and get better but blasting yourself to the point of fatigue and overtraining where you are tired 2 days later or getting so sore it takes 7 days to walk again, is not good training. It will affect your recovery and that ultimately affects your next workout like a domino effect.
Soreness is not an indicator of a good workout. That myth has been around forever. Getting tired is easy. Getting better is not. I’ve never seen any proven scientific results that says soreness is a must in order to get better or stronger or bigger.