"Hexagonal rubber dumbbells. From traditional weightlifting to functional movements, there are so many different exercises you can do with these. By using one dumbbell for smaller muscle groups and isolating, and using two dumbbells for bigger muscle groups and doing compound lifts, 15 kg dumbbells hit that sweet spot that challenges me in both ways. The isolation exercises I prioritize are bicep curls, triceps extensions, front raises, lateral raises and rear flies..."