Today I walked for an hour at the gym. I prefer walking outdoors but it's been raining here.
Walking is great because it's easy on your joints. You don't need a gym or other workout stuff. You only need a comfortable pair of shoes. Walking keeps me leaner but strength training is most important. As we age we need to lift more frequently. I used to sort of be afraid of weight lifting, but after working on proper form and hitting it regularly and consistently, I've gotten used to it, much like brushing your teeth every day. Just getting off the couch and walking to the front door would be beneficial for most Americans!