Even if you are just doing low intensity walking, doing it every day is infinitely better than doing something more strenuous only occasionally. But the real rewards come when you not only commit to intense workouts, but you also commit to being consistent with those workouts.
Regular exercise improves your heart health, brain health, muscle and bone health, diabetes, and arthritis. Beyond those, it also reduces stress, boosts moods, increases your energy, and can improve your sleep. And exercise prevents death from any cause (“all-cause mortality”).