Essay on My English

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1. Define the three energy pathways. For each pathway, identify two exercises that utilize the pathway. If you were training to run a marathon, which pathway would be the focal point of your training? What types of activities would you incorporate into your marathon training and why? How will an understanding of energy pathways help you in your future training endeavors? Three different metabolic energy systems power your workouts — and your day. Here’s how each one works, and how to make the most of them all. Most of us understand our bodies about as well as we understand our cars. We know we’re supposed to take them out for a spin once in a while, and keep them well fueled. But when it comes to grasping precisely how that fuel gets…show more content…
FIRST RESPONDER: THE ATP-CP ENERGY SYSTEM Whether you’re running a 40-meter dash, jumping up to answer the phone, or catching a child falling off the monkey bars, the adenosine triphosphate–creatine phosphate (ATP-CP) system is first to respond. Among your three energy systems, it’s the one most prepared for emergencies. It kicks in whenever the oxidative system, your body’s normal method for providing energy, isn’t up to the demands you’re placing on it. All three of your energy systems ultimately run on ATP: It’s the fuel source for all your physical functions, from eating to breathing to running hill sprints. Your glycolytic and oxidative systems (which we’ll cover shortly) make most of this ATP to order, cobbling it together from the food you eat and the air you breathe as need arises. But a small quantity of ATP is socked away in your muscles for when you need to expend a short burst of energy in a hurry. Let’s say you’re doing a single barbell squat with close to max weight. As you power the weight up, the muscles of your hips, thighs and lower back immediately burn through their ATP stores. Once the ATP has done its job, it’s either further broken down or recycled (with the help of another substance, creatine phosphate, or CP), so it can provide more energy to your working muscles. How fast does the ATP-CP system gear up? Blink and you’ll miss it. “Once you begin hard activity,” says Christopher Scott, PhD, associate professor in the

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