Hi @Michelle M There is a bit of a movement issue that is causing you to fatigue earlier than necessary. Your legs are bent, and stay bent, prior to passing beneath your body as the legs come down. Having bent legs as they pass beneath you interrupts a fluid swing of the legs and pulls on your body more abruptly. This also interrupts the momentum of the downward swing of the legs and leaves you with less ROM (arch) to use to build swing into the following rep. Straight leg T2B isn't for everybody or every occassion, so if you are one of those who need to bend your knees to reach the bar with your feet, I would still suggest you swing your legs straight as they pass beneath your body (both the forward/upward and backward/downward directions) as I show in this video. That will help the fatuge factor and get you some more reps before running out of gas. https://youtu.be/z8LQ2t8SWWU Furthermore, yes you did lose a bit of rhythm. Now, when you lose rhythm on a longer set it's totally understandable because the muscle cant contract as quickly as needed, thus your legs move slower and that throws the rhythm balance off. But, as you jumped into your second set you stretched your body in a more vertical position than I would suggest. Try aiming your feet further forward in front of you before moving into the arched position on that first rep, and make sure this is something you consider regularly because it might be a habit of yours. If you continue to have an issue, watch this video and mentally reflect back to it when you think this circumstance might come up again. https://youtu.be/oIePDIx6iFo Here's one more video for good measure https://youtube.com/shorts/j46cq585Ljw?feature=share