1. The Multiple Sclerosis International Federation. Atlas of MS. 3rd edn. Multiple Sclerosis International Federation, 2020.
2. Kister I, Bacon TE, Chamot E, Salter AR, Cutter GR, Kalina JT, et al. Natural history of multiple sclerosis symptoms. Int J MS Care. 2013;15:146–58.
3. Petajan JH, Gappmaier E, White AT, Spencer MK, Mino L, Hicks RW. Impact of aerobic training on fitness and quality of life in multiple sclerosis. Ann Neurol. 1996;39:432–41.
4. Feltham MG, Collett J, Izadi H, Wade DT, Morris MG, Meaney AJ, et al. Cardiovascular adaptation in people with multiple sclerosis following a twelve week exercise programme suggest deconditioning rather than autonomic dysfunction caused by the disease. Results from a randomized controlled trial. Eur J Phys Rehabil Med. 2013;49:765–74.
5. Briken S, Gold SM, Patra S, Vettorazzi E, Harbs D, Tallner A, et al. Effects of exercise on fitness and cognition in progressive MS: a randomized, controlled pilot trial. Mult Scler J. 2014;20:382–90.