Your first few steps trigger the release of energy-producing chemicals in your cells to fuel your walk . Your heart rate revs-up from about 70 to 100 beats per minute (bpm) , boosting blood-flow and warming muscles .
Any stiffness subsides as joints release lubricating fluid to help you move more easily . As you get moving , your body burns 5 calories per minute , compared with only 1 per minute at rest . Your body needs more fuel and starts pulling from its carbohydrate and fat stores .
Minutes 6 to 10
Heartbeat increases and you’re burning up tp to 6 calories a minute as you pick up the pace . A slight rise in blood pressure is countered by the release of chemicals that expand blood vessels , bringing more blood and oxygen to working muscles .
Minute 11 to 20
Your body temperature keeps rising , and you start to prepire as blood vessels near the skin expand to release heat . As your walk becomes brisker , you’ll be burning up to 7 calories a minute and breathing harder . Hormones such as epinephrine and glucagon rise to release fuel to the muscles .
Minutes 21 to 45
Feeling invigorated , you satrt to relax as your body releases tension , thanks in part to a dose of feel-good chemicals such as endorphines in your brain . As more fat is burned , insulin (which helps store fat ) drops — exellent news for anyone battling excess weight or diabetes .
Minutes 46 to 60
Your muscles may feel fatigued as carbohydrates stores are reduced . As you cool down , your heart rate decreases and your breathing slows . You’ll be burning fewer calories but more than you were before you started . Your calorie burn will remain elevated for up to 1 hour .