Dylan Gee 🇬🇧🇳🇿 on Instagram: "Gym exercise to level up your groundstrokes! 🎾 This is one of my favorite drills for improving rotation and learning to drive through your legs. I like using a heavier resistance in the gym to really build that power, but you can also do a version of this on court with a medicine ball. For maximum explosiveness, I usually keep the weight under 3kg. And yes, lifting heavy is great for us tennis athletes! 🎾 #tennis #tennisfitness #tennisplayer"