The Power of Cross Training

The Power of Cross-Training

Chiropractic Care Optimizes the Benefits of Exercise

Cross-training places numerous physiological demands on your cardiorespiratory and musculoskeletal systems, as well as on your digestive, hormonal, and immune systems. These demands are necessary for your ongoing health and well-being, following both the principle of "use it or lose it" and Wolff's Law (bone remodels along lines of physiological stress). But in order to maximize our cross-training gains, we want to make sure that our body's underlying structure is intact. Our various physiological systems must be able to communicate with each other efficiently, and each system must be able to receive and transmit information to the master system, the nerve system. Regular chiropractic care helps ensure these necessary interactions are taking place, consistently and over time. By detecting and correcting spinal misalignments and by removing nerve interference, regular chiropractic care helps optimize all physiological functioning and helps you get the most out of your cross-training activities.

Cross-training refers to a combination of different methods of exercise. Specifically, cross-training refers to the combination of strength training and cardiovascular training in your overall exercise program. Whether you're a 14-year-old just starting out on your first fitness program, or whether you're a 74-year-old who hasn't exercised in more than 40 years, cross-training will provide optimal results for the time and effort you spend on exercise.
In cross-training, it's not that you're doing aerobic and strength-training activities simultaneously. Rather, you're incorporating both methods in your weekly exercise regime. One week you might do three sessions of strength training and two sessions of cardiovascular activity. The next week you could do three sessions of aerobic exercise and two sessions of strength training. The result is that, overall, approximately half of your exercise time is devoted to each of these two methods.
The remarkable outcome of combining two distinctly different training modes is that both sets of results are enhanced.^1,2 Doing cardiovascular exercise on alternate days makes you stronger. In other words, your muscular strength and size are greater than they would be if strength training were your only form of exercise. Correspondingly, doing strength training on alternate days provides you with heightened cardiovascular gains. Specifically, your stroke volume (the amount of blood pumped on each contraction of your heart muscle) and vital capacity (the amount of air you can take in on each breath) are greater than the results you would have obtained by only doing aerobic exercise.
The benefits of cross-training are automatic. There's nothing you need to do intentionally to achieve these gains, other than engaging in your cross-training program five days a week. When you train your heart and lungs by doing cardiovascular (really, cardiorespiratory) exercise, your skeletal muscles automatically participate in your walking, running, biking, or swimming activity. When you do strength training, exercising your chest, back, shoulders, arms, and legs (on different split-training days, of course), your heart and lungs automatically participate, pumping the extra blood and breathing in the extra oxygen required for any vigorous physical activity.
The synergy created by the cross-training format potentiates the results obtained from each method.³ The improved performance of your heart and lungs, derived from aerobic training, enables greater strength training gains. A stronger musculoskeletal system, derived from training with weights, causes your heart and lungs to become more efficient to meet new demands. A positive feedback loop is established from which you obtain improved health and enhanced wellness and  well-being.
The best time to begin your new cross-training program is today. Start slowly, increase duration and intensity gradually, and evaluate your gains at 6- and 12-week intervals. Your chiropractor is experienced in exercise rehabilitation and will help you design a cross-training program that works for you.
¹Fournier SB, et al: Improved Arterial-Ventricular Coupling in Metabolic Syndrome after Exercise Training. Med Sci Sports Exerc  2014 May 27. [Epub ahead of print]
²Kolka C: Treating Diabetes with Exercise - Focus on the Microvasculature. J Diabetes Metab 4:308, 2013
³Dos Santos ES, et al: Acute and Chronic Cardiovascular Response to 16 Weeks of Combined Eccentric or Traditional Resistance and Aerobic Training in Elderly Hypertensive Women: A Randomized Controlled Trial. J Strength Cond Res 2014 May 19. [Epub ahead of print]

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Heavy Lifting

Chiropractic Care and Core Training

Core training focuses on the deepest muscular layers of your body, including small muscles such as the multifidi and intertransversarii that lie directly on the spinal column and help move individual spinal vertebras. In order to train these deep muscles properly, the spinal vertebras need to be able to move freely throughout their full range of motion. This is where regular chiropractic care comes in. Chiropractic care identifies, analyzes, and corrects sites of limited spinal mobility, making it possible for you to optimally train your core muscles. Returning to fitness requires an ongoing commitment of time and effort. In order to get the most out of your investment in yourself, it’s important to make sure that your body will respond effectively to your exercise activities. Regular chiropractic care helps ensure that you’ll achieve such success.

All of us who’ve experienced a back injury of one sort or another have been told at some point to “avoid heavy lifting.” That type of advice appears to be a no-brainer or at least redundant, as no one whose back is hurting is going to try to pick up an air conditioner or even a 100-foot reel of garden hose. In this context, it’s important to remember the words of Shakespeare’s Cassius: “The fault, dear Brutus, is not in our stars, but in ourselves”. The problem isn’t the heavy lifting, as such. The real problem is in us, that is, in our overall level of conditioning or physical fitness.
Most back injuries don’t occur as a result of heavy lifting, but rather are caused by a seemingly innocuous event such as bending over in the shower to retrieve a bar of soap that has fallen to the floor. Other likely pain-producing scenarios are bending over to place a bag of groceries in the trunk o f a car bending over to tie a loose shoelace. None of these circumstances involved lifting extraordinary weight.  Rather, the common elements are lack of flexibility and lack of appropriate muscle tone and strength to support the weight of your body in a forward flexed position.
The problem isn’t lack of big muscles. Picking up a bar of soap or positioning a 15-pound grocery bag doesn’t require bulging biceps or massive lats. The problem is lack of conditioning. Most of us no longer do actual physical work on a regular basis. We spend the large majority of our day sitting, either working, reading, or watching entertainment on television or other devices. The result of such lack of activity is twofold. Muscles lose strength and muscle fibers are replaced by fat. Additionally, tendons and ligaments contract and become tight, losing their necessary composition of elastic fibers. The functional loss associated with these physiological changes is profound. We experience these change every time we feel a twinge, or worse, in our backs.
The fix is easy and primarily focuses on building up core muscle strength.^1,2 Core training is directed toward your deep abdominal muscles. The main such muscle is the transverses abdominis, which surrounds your entire waist, protecting and supporting your lower back. You can think of this critically important structure as your internal weight belt. Activation of the core muscles is required for all effective physical activity.³ Without this essential foundation, any minor attempt at work, even bending over to pick up a pencil, can lead to disaster in the form of excruciating back pain.
Core training includes exercises such as the scorpion, lying windmill with bent legs, pushups, squats, and the plank. Many good books and numerous online videos are available to provide instruction in the performance of core exercises. Your chiropractor is experienced in rehabilitative exercise and will help guide you to the training methods that are best for you.
¹Inani SB, Selkar SP: Effect of core stabilization exercises versus conventional exercises on pain and functional status in patients with non-specific low back pain: a randomized clinical trial. J Back Musculoskel Rehabil 26(1):37-43, 2014
²Brumitt J, et al: Core stabilization exercise prescription, part 2: a systematic review of motor control and general (global) exercise rehabilitation approaches for patients with low back pain. Sports Health 5(6):510-3, 2013
³Wang XQ, et al: A meta-analysis of core stability exercise versus general exercise for chronic low back pain. PLoS One 2012;7(12):e52082. doi: 10.1371/journal.pone.0052082. Epub 2012 Dec 17