The author explains that muscle atrophy comes from inactivity, citing astronauts and personal experience of starting with simple walks before progressing to jogging and cycling. He highlights the benefits of aerobic exercise popularized in the 1980sâhow regular activity keeps people fit, strong, and youthfulâand stresses that gradual increases in intensity are key, using his own story of injuries and recovery as an example. The post concludes by urging readers to plan for challenges, use proper gear, listen to pain signals, and steadily raise their fitness level so that exercise can renew oneâs youthfulness and vitality.






















