I’m 65 and find that I get very sleepy in the afternoon or after I eat unless I keep moving. I make my living as a writer and find that on days when I don’t get a physical workout in and I’m sitting at the computer writing most of the day, I am exhausted and feel like I am 100. On days when I get up and go for a brisk walk or a run or go to a weight training exercise class that gets my heart rate up, I have a lot of energy all day. It’s the old physics rule of inertia: “An object in motion tends to stay in motion, an object at rest stays at rest.” It always surprises me (although this has been happening to me for 40 years now) how much energy I have for the rest of the day after an hour of intense exercise. A leisurely stroll won’t do it though. I go to a Group Power class at my gym every Monday, Wednesday and Friday at 5 pm and the people in the class range from their twenties to seventies. Those of us who are in the older group go religiously to avoid becoming frail (we do 160 squats over the course of the hour along with other weight exercises for the entire body). One is a medical researcher and another is an attorney, both still working — and they swear that this class keeps their minds sharp while it keeps their bodies strong. I have osteoporosis (have broken 14
bones in the past ) and this class has strengthened my bones (along with Reclast) considerably. Recent research now suggests that regular exercise also leads to milder cases of Covid if you get it. It truly is the fountain of youth for me. I also agree with the person who posted that white sugar, flour and other refined or over-processed foods cause a quick surge of energy and then profound fatigue. Salads, nuts, beans and other whole foods make a big difference in my energy levels as well. These are lifestyle changes that work for me but make sure there isn’t a medical problem by doing a thorough physical checkup with your doc as well - especially if you are out of shape, before embarking on a new exercise plan. Build up slowly— incrementally day by day. The first three
months of my weight class, I used light weights and only did as many reps as felt comfortable and didn’t let my ego push me too far too fast— older tendons and ligaments need slow, smooth movements and
excellent form to avoid injury. I hope this helps!