By Paul  |  PM Fitness, Wheathampstead One thing I've noticed over the years is that people can reach their 40s, 50s or 60s and start believing they've left it too late to improve their fitness. Perhaps they haven't exercised properly for years. Maybe they've started noticing a few more aches and pains, feel less energetic or find everyday activities a little harder than they used to. And sometimes the thought of walking into a busy gym is enough to put them off altogether. But here's something I always like to remind people. Your age doesn't have to determine how strong or capable you can become. Why does strength matter as we age? As we get older, we become more susceptible to losing muscle mass and strength, particularly if we're not physically active. It can happen so gradually that we barely notice it. Carrying the shopping might feel a little harder. Getting up from the floor takes more effort. Or you might start avoiding things because you're not ...