You don't need weight to strengthen and define your arms. Muscle-building moves like diamond push-ups, pike push-ups, and bench dips prove it. Getting away is essential for our well-being, but so ...
The 1-3-5 rule is essentially a very structured to-do list. Instead of a list full of tasks in bullet point form, the 1-3-5 rules introduces a hierarchy: You name one large task, three medium tasks, ...