Sian, Tanvir S, Inns, Thomas, Gates, Amanda, Doleman, Brett, Gharahdaghi, Nima, Atherton, Philip J, Phillips, Jon N, Phillips, Bethan E, "Short-term, equipment-free high intensity interval training elicits significant improvements in the cardiorespiratory fitness of young adults irrespective of supervision", Frontiers in Sports and Active Living, 2021