Dylan Gee 🇬🇧🇳🇿 on Instagram: "5 minute core workout for Tennis players 🎾 45 seconds on 15 seconds off 1. Plank 2. Side plank 3. Mountain climbers 4. Russian twists 5. Bird dog *side plank switching sides after 30 seconds #tennisfitness #tennisplayers #tennisworkout #tennis🎾 #tennislove #tennislover #tenniswithdylan"