Should I exercise?
Exercise is essential, Brother - but functional exercise, not vanity. Your ancestors moved for survival, not to look good in a mirror. Calisthenics, bodyweight training, and walking in nature build functional strength that serves you. Avoid pumping iron in a gym just to look like you can fight. Be able to fight. Be able to run. Your temple should be a weapon, not decoration. Discipline in movement is discipline in life.