Physical Fitness - Late 40s

I bike. A lot. And I can smoke most people half my age.
I can still run, although the odometer has climbed to a point that I pay for a legit workout where I really push.
But I can bike all day.

Walking is the most underrated activity, it's easy on joints and knee's and provides moderate physical activity. Another thing to consider is living an Atkins lifestyle, note I said lifestyle and not diet. Meaning your cut out your fast burning carbs and sugars which your body typically converts and stores as fat, try to get a good mix of pork, chicken, fish, beef everyday with a solid anything green veggie, green veggies are complex carbs that your body digests very slow. On an Atkins lifestyle you can look to loose anywhere between 3-4lbs the first week and if maintained considerably more each week, because all your feeding yourself is complex carbs and protein and our bodies process protein better than any other source. Note you will need to drink allot of water, initially you will get headaches due to not having that insulin/sugar high, I drink allot coffee so I'm usually good. You can still have sweets just try to manage them on a certain day. Last the most important part is to make sure your eating at least 4x a day, that way your never hungry instead you continue to feed your body which never stops the digestive system and your metabolism speeds up to continue to digest all the food. Literally on an Atkins lifestyle you could do nothing but eat your body will loose fat on it's own, because your body uses Carbs for energy, if you restrict those carbs your body still has to pull something to produce energy, in this case your body naturally will burn the fat for energy vs muscle and you get skinnier and healthier, also Atkins is proven to lower your HC1/HC2 and blood preasure, once you get your lifestyle under control it's easier to add jogging and weight lifting maybe even Yoga for flexiability to your life as you will be lighter and tighter.....hope this helps.

How do you keep in shape after all these years? Well, I guess you can say my shape is oval. My thoughts? See meme above. :) Seriously, I would like to get back into running. I use to love doing it. However, because of my knee and lower back (thanks Air Force), I'm not able to do it any more. But the plus side is I'm still the same weight I was when I as active duty.