I recently did a challenge that was 100 push ups a day AND 100 pull ups a day for a whole month. It was pretty tough at first, but after about a week of it I felt like I could keep going on autopilot.

Push-ups are a reliable snapshot of upper-body muscular endurance and trunk stability. For men in their mid‑40s and beyond, they also track capacity that protects shoulders, supports daily tasks, and ...