Caption:Think you need to join a gym to get fitter and stronger? You’re wrong, says an Auckland personal trainer.Photo credit:Jordan Opel / UnsplashPersonal trainer Kyra Seiler.SuppliedStart small for exercise success, personal trainer Kyra Seiler says.Jonathan Borba / UnsplashResistance and strength training will keep you fit into old age.Kelly Sikkema / UnsplashWalking is good exercise, but you need to make it more than a stroll.Social Cut / UnsplashExercise should be challenging, but not damaging.Cole Keister / UnsplashYes, you can lunge your way to better health and fitness.Big Dodzy / UnsplashThere are more benefits to exercise than just looking good.Big Dodzy / Unsplash