If you have room in your home, "weights not only take your higher-intensity-based workouts to another level, but they also help you to build strength" said Tess Glynne-Jones, head trainer at Rowbots. "It's really tricky to get any form of pulling into your session when working with bodyweight. However, as soon as you use dumbbells — like Blk Box Dumbbells (£10 and up) — you suddenly open the door to a whole library of pulling movements that are key players when it comes to strengthening the posterior chain (back of the body). This will improve your posture, which is particularly beneficial for those of us who spend the majority of our days sitting down."