In the last blog, I highlighted how your strength is not from your muscles, but from your brain and nerves that connect it to your muscles. It turns out, that ‘waking up’ of nerve fibers activates your whole body and your well-being in very unique ways. Let’s take a look.
Your muscles. Your muscles are made up of lots of muscle fibers. Imagine each of those fibers like rowers on a boat; the more people rowing, the more strength and power the boat has. If the exercise is with light resistance, only a small amount of muscle fibers is activated. If the weight is heavy, more muscle fibers are called into action. As your muscles get fatigued during an exercise, your nervous system will call upon more muscle fibers to help out.
Your bones. Every day your body is both making and losing bone cells. Around age thirty we seem to start losing more bone cells than we are making. The rate at which that happens depends on how often you are telling your bones to make new cells. When muscles contract, they tug on your bones. When that tug happens, it’s like your muscles are tapping on the shoulder of your bones, saying, ‘hey, stay strong, I need you!’ This sets in motion the immediate signal to your bones telling them to make new cells. Your muscle contraction is what slows the loss of bone. The stronger the contraction, the greater the trigger for new bone cells.
The catalyst: How often do you hear advice to get enough calcium for your bones and protein for muscles? Well, if you put all the ingredients for a cake into a bowl, but never put it into the oven, would you end up with a cake? No. Those ingredients need a catalyst, heat, to make them work together to produce a cake. Getting enough of the right nutrients is only part of building strong muscles and bones. Strength training is the catalyst that makes the nutrients work for your bones and muscles!
Your metabolism. When you challenge your muscle fibers, they go through changes like tiny tears in the fibers and use of the fuel stored right in muscles. It takes them about 24-48 hours to repair and refuel after that use. As they repair from those small tears, they gain strength. While they are refueling and repairing, they are more ‘metabolically active’. That means they are burning more calories for a day or two after you do strength training—up to about 15% more!
Your blood sugars. When your muscles contract, they use fuel stored in your muscle fibers and in your blood system. The fuel is glucose (sugar) and fats from your blood system. Each time you contract your muscles, they are ‘soaking up’ blood sugar and using it. That means that sugar is not hanging out in your blood, affecting every other cell in your body. Because strength training causes the longer-term repairs I mentioned, it also causes longer-term use of blood sugars for hours after you finish. This is why strength training is one of the best ways to manage high blood sugar levels.
And more… There are many more cascades of real-time changes that happen each time you perform strength-training exercises that are similar to those that happen with cardio. For example, brain chemicals are released that improve a sense of optimism, focus, and calm. Nitric oxide is released which helps keep blood vessels relaxed, regulating blood pressure and reducing strain on blood vessel walls that could lead to cardiovascular disease.
Unique benefits, unique barriers. These are just the highlights of the unique and powerful Real-time Results of strength training. So why are 80% of people not doing it regularly? If you are one of them, stay tuned. Next week we will look at the specific road blocks to motivation to strength train.
Bottom Line: Your brain signals your muscles to contract, pulling on bones, and creating movement. This simple progression of events, when done in a way that is challenging for each one of the steps in the process, creates the catalyst for strengthening and maintaining your bone, muscle, and metabolism.
How can you start this domino effect of health and well-being for yourself today?