milan2099 // Getty Images Fitness Build Your Best Body in Your 40s Build Your Best Body in Your 40s Your prime starts here. Build muscle, burn fat, and get fitter than ever with our best training plans and tools for fitness in your 40s. 1 min read Start a Workout Plan The surest path to peak performance in your 40s? Follow a plan. Our step-by-step training programs for guys in their 40s show you exactly what exercises to do, when to rest, and how hard to work. Lose Weight Burn fat and build muscle with this 4-week plan from 45-year-old trainer Cory Gregroy. Get The Plan Build Muscle Build strength and muscle that will last for decades with our most complete training plan. Get The Plan Get Fit Again Get back in shape no matter how many weeks (or years) you’ve been out of the gym. Get The Plan Grow Your Arms Add strength and size to your tris and bis with this 4-days-a-week made-for-dads plan. Get The Plan Walk Off Weight Shed pounds and boost your cardiovascular endurance with this walking plan.…