If you are out of shape, do one set of pushups once a day (however many feels comfortable even if you have to cheat a bit). Start small, even just a couple, and

If you are out of shape, do one set of pushups once a day (however many feels comfortable even if you have to cheat a bit). Start small, even just a couple, and gradually increase the reps over time. You will be blown away by the results after even 2-3 months. Probably works best if you are scrawny to start with but I imagine any out of shape person would benefit. Given it takes less than 1min per day, everyone has time for something like this.