Try to exercise once a day, if not more than once a day. You don’t need a bike, a gym or weights to exercise. You also don’t even need to go outside!
Every morning I pull 5 coins out of my wallet and put them on the table. Then throughout the day I work out and each time I do, I put a coin back in my wallet. I make sure to exercise at least 5 times a day. Now these are extremely short work outs that take 2-3 minutes to do.
I have two work out sessions and I rotate them each day.
Day 1: I do 40 push-ups and then I lift a 5 liter water jug 20 times. I filled one of my water jugs with tap water and I keep it in a corner and never drink it. This 5 liter jug of water can be used for a lot of different exercises.
Day 2: I do 10 sit ups, 30 bicycle crunches, 10 second leg raise (lie down, put your arms at your sides and lift your legs, then hold this position), then I do 30 ab twists (sit on the ground, put your hands together and then rotate quickly from the right and left side of your body) and then I finish it with a 30 second plank.
Both very simple and short exercise routines that anyone can do.