I do calisthenics, aka body-weight training. Not the crazy crossfit incarnation, instead classic ladders, intervals of pushups, pullups and some variations. Add

I do calisthenics, aka body-weight training. Not the crazy crossfit incarnation, instead classic ladders, intervals of pushups, pullups and some variations. Additionally a plank before bedtime and some hiking (~2000km/year) + deep squats to counteract sitting. Most important is to find something you can make into a lasting habit (for years). Otherwise you will end like most people with dieting do.