 The new Opti Fitness range from Argos is an affordable and fun alternative to the gym. This exercise is super super hard but it's a good one because you do five areas at once. Your shoulders, obliques, legs, arms and core so you're hitting five areas in one go. Lie on your left side, two feet apart, same direction and parallel to each other. Lift your hips so you're balancing on your forearm and on the side of your left foot, feet stacked. Extend the right arm straight up in line with the shoulder, palm facing forward. The Opti Vinyl dumbbells are also great for the roundhouse curl and raise. I always try and push myself with this one and increase my reps to see real results. Both partners need dumbbells. While you squat down lowering weights towards the floor, get ready to duck. Your gym bud performs a roundhouse kick over your head. As you stand up you perform a bicep curl. Why not have a great playlist prepped? It will keep you both motivated.